Car Maintenance

Help! I Mixed Antifreeze. Now What?

August 14, 2022 by Denver Express Car Care

Antifreeze is also known as engine coolant. It’s a colored liquid that is mixed with water and added to your car’s engine to help regulate the temperature under extreme heat. As the temperature outside changes between hot and cold, antifreeze is pumped throughout the engine block to help maintain an even temperature.

Antifreeze does more than regular temperature. It’s also designed to keep the engine block safe and operating well. By maintaining it properly, you’ll prevent corrosion from occurring within the system itself.

Yet don’t be fooled into thinking antifreeze is antifreeze. Pick up a bottle and they all are the same. There are different types of antifreeze, and mixing them could be dangerous for your car.

Have you mixed antifreeze? Now what? There are a few things to know if you’ve grabbed the wrong bottle and filled up the reserve with the wrong substance.

How antifreeze works

Some substances, like motor oil, can be added directly into the reservoir as is. Antifreeze needs to be mixed with water, usually in a 50/50 ratio, before being added to the reservoir inside the engine.

Antifreeze is made up of a base chemical called ethylene glycol. It has a much lower freezing point than water. When the antifreeze mixture is added into the engine block, it is pumped around the engine by the water pump. As it passes through hot components of the engine, it absorbs the heat as the liquid is transferred into the radiator. The temperature of the antifreeze is then cooled by the cold air supply that rushes through the radiator as the car drives along. If it has trouble keeping up, an internal fan turns on to control the air movement. After passing through the radiator, antifreeze moves back into the engine where the process begins once again.

Types of antifreeze

There are two major types of antifreeze. One is a green coolant, the other is an orange color. You can find less common types that may be blue, pink, or gold. To ensure you add what’s best for your car’s engine, ready your owner’s manual and follow manufacturer’s guidelines. The easiest way to identify your car’s antifreeze is by color. Yet checking with specifications ensures you purchase what’s best for your vehicle.

Green antifreeze uses an inorganic additive technology, also known as IAT. Phosphates and silicates are mixed in with the ethylene glycol to help protect the metals that exist within the vehicle’s cooling system from being corroded.

Orange antifreeze uses an organic acid technology, or OAT. They are created for today’s newer models that have more nylon and aluminum parts in them. The organic acids are designed to prevent corrosion. OAT antifreeze promises full cooling coverage up to 150,000 miles or so, but it doesn’t consistently deliver. It’s best to keep an eye on it and have it inspected from time to time to ensure it’s operating well.

While less common, other colors of antifreeze such as blue, pink, or gold exist and deliver cooling qualities to other types of cars and trucks. The difference is in the additives they use within the antifreeze mixture itself.

Antifreeze is antifreeze … Or is it?

If you search online, you’ll find people on both sides of the issue. Some say you can mix antifreeze without an issue. Others tell you it’s a big problem. Which is true?

Mixing antifreeze is a bad idea and can cause serious damage to the engine block. What can happen depends on what types you mix together, as each mixture provides different qualities to your vehicle. If the chemical composition is the same but the brand is different, no harm will come to your vehicle.

The most common mixup is with the green and orange antifreeze. When green and orange mix, they form a thick coagulant that gums up and sticks inside the system. The damage can happen swiftly. It shortens the lifespan of the coolant and starts impacting the engine block almost immediately. If it continues to operate, it risks damaging the entire cooling system. It can cause problems with the radiator, water jackets, heater core, and in severe cases, the head gasket.

How often does a car need new antifreeze?

Antifreeze isn’t a fluid you add and change out frequently, like you do motor oil. It’s a good idea to have antifreeze levels checked periodically. You can do so at the start of summer and winter, when antifreeze will be put under more extreme stress. You can also do so if you’re heading out for a road trip, to ensure everything in your vehicle is working well.

Your car’s owner manual will provide precise information on when and where to have antifreeze levels checked and changed.

It’s usually when you’re on a road trip or outside of your normal routine where you might be tempted to use whatever you can find. If your car is overheating and you’re tempted to add more antifreeze, before risking adding the wrong liquid, you can add distilled water instead. The most common composition of coolant is made from 50 percent antifreeze and 50 percent water. A car will never run with 100 percent antifreeze. Adding water will reduce the freezing point, but it can get you safely to a mechanic where the entire system can be evaluated.

A coolant flush

Coolant flushes are necessary when you start noticing an issue with your vehicle’s function, status, and performance. You may notice you car is in need of a flush if it:

Overheats – this is a sign of excessive heat in the engine. The engine doesn’t have the proper heat balance that coolant provides.
Ages – if you’ve been driving for more than five years without an issue, it may be time to check the condition of the coolant and flush it out to remove debris and other contaminants.
Warning signals – the check engine light is a clear indicator that something is wrong internally.

Mixed antifreeze is a problem

If you’ve accidentally mixed antifreeze types, your best course of action is to bring it in and assess the damage. A coolant flush can remove the current mixture and allow you to start fresh with a clean mixture recommended by your vehicle’s manufacturer.

It allows your car to continue operating well.

Have you ever mixed antifreeze before?

What It Costs If You Neglect Car Maintenance

August 10, 2022 by Denver Express Car Care

What are the most neglected car maintenance items? According to one survey, they include:

Wheels out of alignment
Skipping out on regular oil changes
Letting tires wear out and going bald
Missing the check engine light
Ignoring sluggish brakes that just don’t feel right

Of course, as busy people, we have our reasons:

We’re too busy to take the car in … maybe later
Money is a problem … waiting until next payday looks better
The repair isn’t that urgent … What’re a few more weeks going to do?
The repair will take how long … I can’t live without a car for that long!

Do you see yourself in any of the situations above? We’ve all been there a time or two.

But waiting to fix a car maintenance item is never good for your vehicle. It turns a simple, inexpensive issue into a full-blown problem. What started out as low-key – scheduling an oil change – turns into an expensive endeavor – a blown head gasket.

If you thought an oil change was expensive, wait until you deal with a head gasket replacement.

Oil changes, by far, are the most neglected car maintenance item for car owners. A few thousand miles can slip by quickly when you’re busy and have a lot on your plate. Manufacturers give a window of several thousand miles for scheduling an oil change, and many people press the limits.

Yet neglecting an oil change can increase buildup and friction within the engine compartment. Over time, that wastes gasoline, decreases fuel efficiency, and risks blockage deep in the system. When that happens, friction builds, heat accumulates, and various engine components break down.

What It Costs If You Neglect Car Maintenance

You may think you’re saving money by pushing the timeframe between oil changes, but what you’re really doing is increasing the likelihood of a bigger problem down the road.

Ignoring car maintenance comes at a price. Let’s look at the costs of not taking care of your vehicle:

It impacts the life of your vehicle

Today’s vehicles are made up of more than 10,000 components, all acting together to create an efficient machine that gets you to where you’re going. Fluids, filters, belts, hoses, parts, systems, and individual components all will wear down over time. Some need replacing frequently. Others may last the life of your vehicle. Yet each part is dependent on the quality of another. If one isn’t feeding the systems correctly, it puts added stress onto that part.

The standard vehicle today has an average life of about 12 years, and is expected to keep running up to 200,000 miles. On average, a car will start costing you more money the older it gets and the more mileage you put on. One of the ways to counter that is through regular inspections, ensuring individual parts are in good working condition before they have a chance to impact others within the system.

It increases the cost of future repairs

Studies consistently show that cars on the road today operate with

Low or dirty engine oil
Low or contaminated brake fluid
Dirty air filters
Low coolant
Old windshield wipers and low washer fluid
Old

These basic items might not seem like a big deal, but simple, low cost items can quickly add up.

Oil changes – if you go months without changing the oil, you may end up by the side of the road, having to tow your vehicle in because it no longer runs. Upon further inspection, the mechanic discovers the engine has seized. Your options are replacing the engine, or buying a new car. That’s a big deal considering today’s average new car price is $47,148. Compare that to an oil change every 5,000 miles or so at a fraction of the cost.

Brake maintenance – brake pads have a built in mechanism to warn you of potential problems. When they start squealing, it’s an indicator that the brake pad is nearing its end-life, and needs changing soon. If you ignore the problem, the metal from the brake pad wears into the metal of the brake rotor. It continues to burn through the rotor and down into the ventilating fins. Instead of a simple brake pad replacement, you’ll be looking at thousands of dollars to fix multiple problems within the brake system.

Belts and hoses – these components can last a long time. But when they do start wearing out, you’ll hear squealing noises indicating a potential problem. If belts don’t have proper tension, it’s like having no belt at all. Many cars operate with a single serpentine belt. If it quits working correctly, it impacts the water pump, which quits circulating coolant throughout the engine, which stops the alternator, shuts down power steering, and shuts down your air conditioner. Fixing the belt is easy and a fairly straightforward process, depending on your vehicle. Replacing multiple systems is a costly experience that can quickly run into thousands of dollars. Timing belts can also be expensive if they slip or break, sending a piston into an open valve. If this happens, it can cause the engine to self-destruct. The cost of a timing belt is far less than dealing with a non-operational vehicle that needs a new engine.

Fluids and filters – these are simple routine maintenance items that are often spotted during regular inspections. When you schedule visits with a mechanic you can trust, they will help you keep your car in good physical condition, replacing parts and filling up fluids before further damage can be done.

It reduces risk

If you’ve ever been stranded on the side of the road, you understand risk.

Where were you heading? You might be late for a meeting at work. You might miss a flight if you were heading to the airport.

Now what? You may be facing towing expenses. You may have to deal with a mechanic who doesn’t have your best interests at heart.

Nobody likes facing repair bills. But neglecting car maintenance items only puts off the inevitable.

If you’ve been neglecting scheduling a visit, wait no more.

Call us today, and we’ll inspect your vehicle. We’ll help you make the best decisions for the future of your vehicle. And help you bring it back to the best condition possible.

How To Keep Your Car’s Air Conditioner In Top Shape As The Heat Climbs

July 24, 2022 by Denver Express Car Care

Summertime here in the Rockies has started to feel like endless days in the 90s and 100s, as heat settles across the land with little relief. You’re using your air conditioner like never before …

But what about inside your car? There are rumors out there that running the air conditioner makes your gas mileage fall. If you use your AC frequently, it will impact the overall health of your car.

Are those myths? How do you keep your car’s air conditioner in top shape even as the heat continues to climb?

Using your air conditioner when you first get in the car

Getting into a hot vehicle is never fun. It’s hot, stifling and can take a lot out of you. Yet pre-cooling your vehicle isn’t the answer. Instead of turning on the AC and letting it idle until cool, put the fan on high and open the back windows for 20 seconds allowing the hot air to flow out the back. The air conditioner is powered by an engine in operation. It puts added stress on the system when you idle, trying to get the car cooled before you move. Give your AC unit the support it needs and start driving before you turn it to full speed.

How To Keep Your Car’s Air Conditioner In Top Shape As The Heat Climbs

Schedule regular maintenance at the start of each season

When you establish a relationship with a reputable mechanic, you can feel comfortable bringing the car in for sound advice. We recommend scheduling seasonal visits twice a year to get your car ready for summer and winter driving. This will allow us to ensure every component and system is in optimal condition, ready to work hard for you as we have record-breaking events. For the air conditioner, it ensures your antifreeze is topped off, and that the appropriate coolant is being used within the system.

Change the AC filter as needed

Your owner’s manual is filled with important facts and information about how best to operate your vehicle. The more familiar you are with it, the more you can use it to schedule regular maintenance items and stay ahead of your car failing at inopportune times. Most AC filters last around 30,000 miles. The AC filter is typically located behind the glove box, and is something easy to change. If it’s been a while, changing it out will help increase airflow, reduce unpleasant odors, as well as reduce dust from settling into the interior of your car.

What to do when you notice odors

Any sign of odor or a strange smell is reason to be concerned. It can be annoying at best, dangerous at worst, and something you should act on immediately. There are a few odors that might suggest urgent issues:

A must smell could mean mold entering the cooling system’s evaporator. Try running the heater for a while to dry out the evaporator core and see if it disappears.
A sweet smell may signal an antifreeze leak. It’s time to bring it in for professional evaluation.
A gas smell coming from the AC unit could be an indicator of a gas leak. It could be something as simple as an unsecured gas cap, or a sign of a bigger hazard.

Keep inducts clean

There’s a reason it’s a good idea to keep your car clean during the summer and winter. If you allow buildup of water, snow, and dirt at the base of the windshield, it can impact the inducts. Moisture can sit there and build, blocking airflow and possibly causing mold or other pollutants to settle in. As these contaminants continue to grow, it enters through the air conditioner every time you use it. Keep this area clean by washing it regularly.

Run your AC periodically on defrost mode

When you turn the defrost mode on in the winter, have you noticed it kicks the air conditioner into gear? That’s because when the system is in defrost position, the AC compressor turns on. This draws outside air in and sends it through the AC evaporator to remove moisture from the air supply before sending it back to the heater core. By turning the defrost system on periodically throughout the summer, you’re allowing the system to run at maximum fan speed and coolness setting, helping clean out moisture and preventing mildew. What works to remove moisture from your windows during cold winter months also works well keeping your inside air supply cool, dry, and comfortable in the summer months.

Don’t leave the air conditioner on recirculation

While the most common AC buttons are to adjust temperature and fan speed, you’ll also see switches to move from fresh air to recirculation. Fresh air allows outside air to flow in. Recirculation continuously recirculates air throughout the inside cabin. While you may wish to recirculate when you’re behind a smelly diesel truck, move back to fresh air when you can as it provides more circulation throughout the inner cabin. Recirculation pulls air from the front and re-cools it. That makes the air flowing towards the back warmer as it’s recirculated back up front. With a full car and passengers in the back as well as the front, a constant input of fresh air will give you the best results.

What are the most common air conditioner issues?

Like many other systems in your car, the air conditioner components wear down over time. Common issues can be:

Refrigerant leaks
Cracked or broken cooling fans
Condenser and compressor malfunctions

A refrigerant leak is easy to spot. It’s a fluorescent yellow-green color that’s easy to detect as it leaves traces underneath your car.

Cooling fans can slow down or stop altogether for a variety of reasons. It can blow a fuse, have an electrical short, or be cracked by hitting debris on the road.

A broken condenser can be caused by a damaged part, component failure, or debris moving in through the grill and damaging the part.

In all cases, the faster you act, the less damage may occur.

Whether you’re performing preventative maintenance, ensuring your air conditioner is running well, or you have a problem with your system and it’s not keeping you cool, schedule an appointment today to get your AC system back in good working condition.

And stay cool no matter how long this current heat wave lasts this summer.

Does Your Car Still Use a Muffler?

July 14, 2022 by Denver Express Car Care

I was surprised by the question: Does a car still use a muffler?

And yet it makes sense. Years ago, it was common to see commercials on television touting muffler repair and replacement. Cars weren’t as sturdy. Owners anticipated having to replace parts of the exhaust system every few years.

Today, however, that has changed. Most modern vehicles have a stainless-steel or aluminized-steel exhaust system designed to last for a lifetime.

What is a muffler?

A muffler is designed to muffle the sound created by a rumbling engine. Engines operate with a lot of power. That energy creates continuous pulsating sounds that reverberate through the exhaust valves. It creates thousands of pulses per minute, which could create a very noisy environment without the muffler in place.

A muffler is designed as a noise canceler. If you were to open a muffler up, you would see a series of tubes, baffles, and chambers all working to reflect the sound waves as they move in from the engine. They are reflected back and forth in such a way to decrease and cancel each other out.

Mufflers are created differently. Some are designed for quiet, reducing the noise to a minimum. Others are created with lower tones and different zounds. If you hear a growling noise from some vehicles, it’s the way the muffler was designed.

Why mufflers grow noisier with age

When you drive a vehicle off the showroom lot, it’s a solid machine that works at optimal performance. From there, every bump in the road or slamming on the brakes starts wearing on the various components. This doesn’t happen all at once. Unless you’re in an accident, it happens slowly over time.

This is normal.

Over time, the engine starts to wear down. Even if you bring your car in regularly, various parts continue to wear down. Belts can wear and extend. Joints can wiggle loose. Efficiency can degrade.

As the pieces no longer fit together quite as tightly, you’ll notice it in performance. You may hear noises you’ve never heard before.

Every noise you hear is an indicator of something not working quite the way it was designed. It might not impact your car … at first. But over time, it can start causing damage within the system.

Oil is one of the most important foundations for an engine’s good health. While there may be some debate on whether to change it out every 3,000, 5,000, or even 7,000 miles or more, err on the side of changing it more. Oil is a lubricator that keeps your engine cool and working well. As oil degrades, it won’t perform well, which causes the engine to have to work harder for performance.

This is where problems begin.

A muffler takes that noise and muffles the sound. More sound means more work. And because a muffler degrades over time too, you get the two components countering each other.

Common muffler problems

The most common muffler problem is rust. As water trickles through the exhaust system, it causes condensation to build within the system. As some of it accumulates, it causes rust over time.

Moisture can accumulate from other resources too. During our snowy winter months, ice and snow can build up underneath your vehicle. Rain can splash up during the rainy summer months. This can also build up over time and cause rust, especially along joint and connection lines.

Another common problem exists when holes or loose parts exist within the exhaust system. This happens over time. Hitting a bump or a pothole causes friction in connections. Every rock kicked up as you drive can ping the muffler. While you might not see damage the first month after you purchase a vehicle, or even after the first year, damage accumulates over time. It’s the constant wear and tear that eventually causes a problem. And if a crack exists in the muffler or tailpipe, it needs to be replaced.

How to know your muffler needs replacing

Like other parts on your vehicle, there are telltale signs a muffler gives you, signaling it isn’t working properly.

The easiest is by producing more noise. Since a muffler’s main objective is to remove noise, you’ll notice if it’s no longer performing optimally. When a muffler is damaged, it can’t provide noise reduction. You’ll hear it every time you start your car and drive. It won’t be something you can ignore, as it will only worsen over time.

The engine can also misfire. A misfire shows up as a sudden loss of speed, yet the engine recovers quickly and moves on. It feels like it stumbles, catches, and recovers. This happens as exhaust moves through the system, it catches in the muffler without moving smoothly through the system. This catch causes it to hesitate, showing up as a misfire.

You can also notice it in your fuel economy. And with prices rising as high as they are today, you’ll feel it in your wallet. A good exhaust system is essential to a vehicle’s performance level. The muffler can easily be the starting point to losing efficiency. A crack or leak in the muffler allows exhaust to flow where it shouldn’t be. This cuts back on performance, requiring more fuel to get the job done. This means the fuel you put in will have to work harder for the same results. You’ll be filling up more often as you move through your weeks.

You might also hear a rattle if the problem stems from loose parts. A loose connection, a damaged part, or a small crack can allow different pieces to rub together, bang together as you hit a bump, or rattle as the car vibrates and moves.

How to fix a bad car muffler

Unfortunately, the only way to fix a bad car muffler is replacement. If it has a minor hole, a mechanic may be able to use adhesive material to patch and bond to the muffler’s surface. But beyond that, it’s better to replace the entire muffler. It’s the best way to ensure it works correctly with your system, providing both safety and fuel efficiency.

When was the last time you had your car’s muffler inspected?

Gas Saving Tips For Your Summer Travels

July 10, 2022 by Denver Express Car Care

How fuel efficient your car was even a few short months ago wasn’t that big of a deal. When gas prices were low, a swing of 5 to 10 miles per gallon barely registered in your mind.

Yet now, gas prices are rising … drastically. You notice it every time you pull into a gas station and fill up your tank. It’s difficult watching your final cost rise significantly upward, knowing there isn’t much you can do. Gas saving tips you read online never really amount to much … Do companies really think trading your car in for an electric car will save you money? Not when the average price of a car just rose beyond $47,000?

If your summer plans include road tripping, you want real gas saving tips you can use right now, with the car sitting in your driveway. Luckily, there are many things you can do that won’t break the bank.

Let’s start with the reasons why your car’s losing fuel efficiency

Sure, you can save a little bit of money by tracking gas prices with your favorite app, but that amounts to a few cents each fill up. The same applies to paying with cash.

Gas is an important part of keeping your vehicle fully operational. Have you ever purchased cheap gas and noticed your car ran rougher as it moved through the system?

The quality of gas is equally important. We suggest finding a reliable source that’s convenient for your lifestyle. Then use that source every time you fuel up. Do they have a loyalty program? This is the time to use it.

Depending on where you go on your summer road trip, you can sometimes find the same source along your drive. Many consumers use Costco for gas as well as other lifestyle choices. You can map out the best places to stop based on where a servicing station is convenient. It also works well if you need to pick up a few food items when arriving at your final destination.

While you can save some cash this way, it won’t make a huge dent in your fuel bill. This is when it comes time to ensure your car is in top condition, to ensure it’s using fuel as efficiently as possible.

Air filter

An engine needs both fuel and air to power the engine. Without the proper air supply, it won’t operate correctly. If the engine isn’t taking in enough air, it compensates for it by adding more fuel to the mixture. It will take more fuel to travel at the same speed.

This is why it’s vital to ensure the air filter is clean and capable of allowing a proper air stream into the engine. Clogged air filters are especially common in older cars that still rely on carburetors. While most manufacturers recommend replacing your air filter every 15,000 to 30,000 miles, it’s a good idea to check it regularly and replace it as you notice changes.

Fuel filter

A fuel filter blocks contaminants in the fuel supply, preventing them from traveling throughout the engine where they can cause harm. One of the biggest places contaminants can hamper fuel efficiency is by damaging fuel injectors. It can also lower fuel pressure, which further compromises your engine.

As your car ages, manufacturers suggest replacing a fuel filter every two years or 30,000 miles, whichever comes first. Check with your owner’s manual to follow recommendations. If you suspect a dirty fuel filter, bringing it in and letting a mechanic inspect it will ensure all parts of your fuel system are working as designed.

Fuel injectors

One of the most common reasons for a drop in fuel efficiency is a dirty fuel injector. Fuel injectors are tiny nozzles that spray fuel into the engine cylinder. This spray system must work precisely to mix with the air supply at the right time. Without it firing properly, it disrupts the fueling process.

When fuel injectors become dirty or clogged, the fuel spray is anything but precise. In some cases, the fuel injectors can be cleaned. Other times they may need replacing to ensure a proper spray pattern. Fixing the problem early will prevent it from escalating and damaging other parts of your vehicle.

Oxygen sensors

Today’s modern cars use an oxygen sensor to measure how lean or rich the exhaust gasses are as they exit the engine. These sensors register the results, then send a message to the computer system to adjust the amount of fuel that enters the engine.

When an oxygen sensor is dirty, it can lead to an inefficient amount of fuel entering the engine. Some estimate that fuel economy can be lowered by as much as 40 percent.

A faulty oxygen sensor is one of the more common reasons the check engine light will illuminate on your dashboard. It’s a good idea to bring your vehicle in anytime a light illuminates. A faulty oxygen sensor is an easy, affordable fix, and will help keep your fuel economy in check.

Tires

Low tire pressure can be a common occurrence as you drive on scorching hot roads. It’s also a common cause of lowering your fuel efficiency. Underinflated tires have more roll resistance with the road. It creates drag as you drive and lower the fuel economy over time.

Luckily, it’s also one of the easiest to fix. Pay attention to the dashboard. If it illuminates low tire pressure, inspect your tires for any signs of weakness. You should also check your tire pressure and fill it up with air as needed. Because tires can have a major impact on safety, especially as you road trip, it’s essential to pay attention to this throughout your trip.

Alignment

No matter how well you drive, you can’t avoid potholes, bumps, and other road hazards all the time. Each bump impacts your wheel alignment, and if it no longer sits straight, it’s costing you money at the pump.

Just like low tire pressure, a poorly aligned wheel creates resistance as it travels down the road. This continual pull hurts fuel economy too.

Now’s the time for a little TLC – before your road trip

With both your safety and fuel efficiency at stake, scheduling a maintenance visit before your next road trip just makes sense. You’ll stop any potential repairs from escalating, and ensure your vehicle is as efficient as possible.

It’s the best gas saving tips we can give.

How Exhaust Leaks Are Impacting Your Gas Mileage

July 7, 2022 by Denver Express Car Care

With gas prices climbing higher each day, it’s only natural to pay more attention to your gas mileage. When you watch your budget being eaten by trips to the gas station, fuel efficiency is of top concern.

Will exhaust leaks impact gas mileage? Will exhaust leaks affect your vehicle’s performance?

While you may not have thought much about the process before, times are a-changing. Exhaust leaks can and will make you take more trips to the gas station. It impacts performance, and underscores your efficiency.

What do you need to know?

Understanding your car’s exhaust system

A car’s exhaust system is a variety of pipes, connectors, sensors, and mechanical devices designed to handle and dispose of exhaust fumes that are produced by the engine’s combustion process. The exhaust system is designed to:

Funnel potentially dangerous exhaust fumes away from the occupants of the vehicle
Reduce the noise levels of the internal combustion process
Reduce the toxicity levels of outgoing fumes that can be harmful to humans

Why exhaust leaks can be dangerous

The combustion process is a powerful force used to create energy, and make your car go. Car exhaust fumes can contain a variety of poisonous chemicals, including:

How Exhaust Leaks Are Impacting Your Gas Mileage

Carbon monoxide
Sulfur dioxide
Nitrogen oxides
Formaldehyde
Benzene
Soot

Each can be harmful to your health.

A properly working exhaust system ensures your vehicle is operating safely for you and those around you. When an exhaust leak occurs, it can allow dangerous gases to enter the atmosphere around it. If that moves into your vehicle, it quickly creates a hazardous situation. Many of these harmful gases are odorless, which means you won’t even realize their impact as you ride in the passenger cabin. Prolonged impact can make you sick.

You may have an exhaust leak if you notice …

For many drivers, an annual emissions test may be the first sign you receive that something is wrong. If you pull into your state’s testing center, it records an abnormal reading, alerting you to a potential problem. To continue legally driving, you’ll have to fix your exhaust system before getting your certification.

But that’s not the only way your vehicle alerts you to a potential problem. Exhaust leaks can give you other warning signs that give you advanced warning.

Engine noise – listen for a loud rumble that often occurs while accelerating. Depending on where the leak is, you may hear a variety of noises: popping, hissing, ticking, or buzzing. It usually sounds louder when you’re outside the vehicle, and it will get louder as you rev the engine.

Loud exhaust – over time, you get to know the sounds of your vehicle well. If you have a leak in the exhaust, it will make driving and accelerating louder than normal. You will know if you have a leak.

Loss of acceleration – anytime the system doesn’t work the way it should, it can impact performance. When you press down on the accelerator, you may notice your vehicle no longer accelerates the way it once did. It no longer has pick-up-and-go. This won’t go away. You’ll continue to lose power as the leak becomes more pronounced.

Vibrations – don’t you just hate rattles and vibrations, and you can’t seem to find the cause? Exhaust leaks allow air to escape from cracks or holes in the system. Depending on where it is, it can cause a variety of vibrations.

Noxious smells – some of the exhaust fumes are odorless. But that doesn’t mean you can’t smell it. One of the exhaust system’s functions is to give it an odor to make sure you smell it in the event something goes wrong. If you start to smell exhaust fumes moving towards the front of the cabin, you have a problem. You may notice it as a gas smell as well.

Reduced fuel economy – with today’s gas prices soaring sky-high, this might be one of your first clues if you monitor your mileage. Are you returning to the gas station more frequently? An exhaust leak may be the culprit. Exhaust leaks cause an air-to-fuel ratio imbalance that makes the engine less efficient. That increases the amount of gas needed for processing.

What’s causing exhaust leaks?

Just like exhaust leaks can spring to life for a variety of reasons, what causes them varies depending on your vehicle. It may be from:

Corrosion – the exhaust system rides close to the ground. It’s impacted by heat and cold, ice, rain, and snow. When you drive on a dirt road, rocks and gravel can pound against it. When you drive in the winter, salt, mag-chloride, and other chemicals can affect the metal. Heat can cause melted road tar onto the system. Go on a road trip? You may bring part of the experience home with you. Through all the miles your car drives, it can impact the system over time.

Damage – the exhaust system resides underneath the car, close to the ground. Potholes, road hazards, unpaved roads, and even normal driving conditions can all cause damage to the low-lying equipment. If a rock bounces up, it can damage the metal.

Failing joints, gaskets, and welds – every piece on your vehicle degrades over time. If it was installed correctly, it might last the manufacturer’s suggested time limits. If it was poorly repaired, it might show up sooner than expected.

Time and age – everything wears down over time. The older your vehicle is, the more room for problem areas can arise.

Fixing exhaust leaks

Exhaust leaks are a job best left to the professionals. That’s because it contains a variety of issues to ensure it’s brought back to good working condition. It may include part replacement, dealing with metal corrosion, or ensuring the system is functioning well. Everything from new parts to sealants may be used.

The exhaust system isn’t something you want second-rate. Your life could hang in the balance if something isn’t right.

Your best line of defense against exhaust leaks is to have your vehicle inspected on a regular basis. If you notice significant changes, schedule an inspection right away.

It’s the best way to keep repair bills to a minimum, and ensure you’re vehicle is always running smoothly.

Should You Consider a Transmission Rebuild?

July 4, 2022 by Denver Express Car Care

Your vehicle’s transmission is a vital part of operation. Without it, your car won’t go.

If your transmission has problems, it can be a safety hazard. Imagine getting in a situation where your car won’t change gears, or suddenly does as you’re driving down the road.

When you notice a transmission problem, a mechanic will inspect it and find what’s causing the issue. It might be a minor repair, or it could be more serious. That’s when you’re likely to have to make a decision: should you consider a transmission rebuild, or is it time for a new one.

Understanding a transmission

Think of a transmission as a car’s gearbox. If you compare it to a bicycle, it would consist of a gear shifter and chain mechanism.

The transmission components are mounted to the engine compartment so the gear and chain system can effectively convert combustion power from the engine into physical energy.

Fuel is ignited in the combustion chamber. As fuel ignites, it uses the heat to push pistons up and down in the engine cylinder, spinning the crankshaft. This crankshaft is what’s used to move the wheels.

Should You Consider a Transmission Rebuild?

It’s the transmission system’s job to ensure this energy force is kept under control. The transmission ensures energy is sent to the wheels at intermittent levels, depending on the speed you’re traveling at. Without it, it would be difficult to start and stop your car.

A transmission changes gears as the vehicle moves through different speeds. As you push down on the accelerator, let up and apply the brake, the transmission adjusts so that the engine’s revolutions per minute (RPMs) are kept relatively low. This provides better fuel consumption, and ensures the energy process doesn’t overload the engine. Think of it as a harnesser of energy, making the entire process work safely and efficiently.

Everything works well. Until it doesn’t.

What is a rebuilt transmission?

Transmissions are one of the most complex systems that make your vehicle operate. When something goes wrong with the transmission system, the repair process can escalate fast.

While mechanics will speak of a transmission as if it were one part, it’s actually a series of over 800 different components, each with its own unique make and model. Each part can be repaired or replaced. It’s a time-consuming and expensive process. Even for a highly trained mechanic, it takes time to ensure the right pieces are fixed, and the entire system is efficient once it’s put back together.

Inside a transmission are several major components:

Gear set – this allows the forward and backward motion.
Hydraulic system – transmission fluid moves through the system to help control gear movement. It helps with lubrication, cooling, and shift control.
Seals and gaskets – these components ensure lubricant stays where it’s supposed to be without leaking.
Pump and turbine – the engine and transmission work through a series of three fans, spinning as fluid is pushed through the system.
Throttle cable – this monitors speed and throttle position of the transmission to help determine the proper time to shirt.
Computer – modern day vehicles use a computer to control the process through a series of sensors.

A transmission rebuild would include working on any one or more of these components. If any part is damaged or worn out, the components would be in need of repair. It includes replacing a series of parts rather than replacing the entire transmission.

Rebuilt transmissions can involve major overhauls. It can include replacing several parts or systems within the transmission rather than installing a brand new one.

What happens during a transmission rebuild?

When a mechanic rebuilds a transmission, it involves removing the transmission and completely disassembling it. Each piece is inspected for damage or wear, and a decision is made on whether to keep it or replace it. If it’s kept, it’s cleaned and used as the system is being rebuilt. Clutches, seals, gaskets, and any other easily worn items will be evaluated during this process as well.

Why are transmission rebuilds popular? Because a rebuilt transmission can be considerably less expensive than replacing the entire system. Even a rebuilt transmission can cost several thousand dollars, depending on the problems. It’s a way to keep the costs as low as possible while bringing your vehicle back to drivable condition.

There is a break-even point where a transmission rebuilt and installing a new transmission meet. As parts and labor creep upward, there’s a point where it makes more sense just to replace it. A reputable mechanic can help determine that and make suggestions along the way.

Research shows that transmissions tend to fail between 80,000 and 150,000 miles. As you approach that mileage, you can start asking yourself questions.

How often do I bring the vehicle in for routine maintenance?
What problems have I had in the past?
How long do I plan on keeping this vehicle?

These questions can help you decide the best course of action. If your transmission has a history of problems, needing repair work frequently since you purchased it, it may point in the direction of replacement. If it’s never given you any problems before, rebuilding the transmission may be the solution.

Some common indicators of needing a transmission rebuild

Problems with your vehicle rarely occur instantaneously. Instead, you’ll start noticing problems build over time.

Transmission slipping – you’ll notice regular and sudden changes with gears shifting when it’s not expected. It might make a humming noise. It often happens with low transmission fluid levels, or lack of maintenance. The worse it gets, the more the gears are damaged. Too much damage would require a new transmission.

Gear shifting problems – your car won’t go without the ability to shift gears. When this starts to fail, you’ll notice it in several ways:

A jerking sensation as it moves between gears
Shifting without reason
Falling out of gear while driving
Hesitation before engaging

Burning smell – any burning smell should be checked out right away. It’s a sign of a component failing. The sooner you find the problem and fix it, the less at risk you are of the entire system collapsing.

Fluid leak – transmission fluid is a red color. If you notice it darkening, or leaking anywhere from the system, you’ll have cooling issues. Continuous leaks can result in low levels of transmission fluid, which means it’s not running through the system at optimal levels. It can damage a series of components.

Do you have transmission problems?

Whether a transmission rebuild is in your future, or a full replacement is necessary, it starts with a full inspection. Bring your vehicle in today, and we’ll help you make an informed decision.

6 Signs of a Bad Fuel Pump

June 28, 2022 by Denver Express Car Care

Today’s modern fuel pump is designed for effectiveness and efficiency.

An electrical fuel pump is used by all modern day vehicles that still rely on gasoline for power and energy. It works by utilizing a motor in the fuel pump assembly to draw in fuel you’ve previously pumped into the fuel tank. From there, fuel travels up into the fuel line, and into a fuel rail where it’s injected into the cylinder. It mixes with air and a spark to create combustion.

The pump contains a filter at one end to keep any impurities from moving past the fuel tank and into the fuel line. There’s also a fuel float that sits on top of the fuel supply and sends out a signal to the sensory board. It reads the resistance and relays the message to the fuel gauge, telling you how much fuel is left in the tank.

It’s a simple process, and when it works correctly, your entire system is an effective machine.

Yet because it’s part of a bigger picture, one piece among many in a vehicle with over 10,000 parts, one small failure can impact the entire system. And it’s often difficult to tell which component is failing.

Types of fuel pumps

Older vehicles relied on a mechanical fuel pump to achieve results. The mechanical pump would draw fuel in, trap it, then move the fuel toward the carburetor and engine. It was a cyclical movement, repeating the process repeatedly.

Electric fuel pumps use an injection process with high powered pressure. It’s accomplished by using an electrical process rather than mechanical. They come in several formats:

In-tank – the majority of fuel pumps reside inside the fuel tank. This helps protect the module, keeping it cool as it operates.
Inline – these are easier to replace as they are mounted outside of the fuel tank, somewhere between the gas tank and the engine.

While there are others, these two make up the majority in cars today.

How long a fuel pump lasts

While fuel pumps aren’t a part of a regularly scheduled maintenance routine, like any part on your vehicle, they won’t last forever.

Most manufacturers today will state that a fuel pump should last well past 100,000 miles. They aren’t part of a preventative maintenance package that should be replaced “just because.”

Yet they can and will fail the longer you drive your vehicle. Luckily, they start to give warning signs before they shut down completely.

That’s where paying attention to your vehicle can pay off. If you notice any of these warning signs, bring your car in for a full inspection. That gives you a chance to make the repair before it leaves you stranded, or causes even more damage down the road.

Engine faltering at high speed

As you pull onto the highway and drive consistently at higher speeds, you may notice your vehicle falters a bit before returning to its regular performance. This is a classic sign there may be something wrong with the fuel pump. This sputtering occurs as the pump struggles to keep a consistent stream of fuel moving into the engine for proper pressure. This causes a hit or miss chain as the fuel circulates, causing the engine to falter as it reacts.

Vehicle dies with a heavy load

Are you pulling a trailer, or simply have your car loaded down with materials? The extra weight could add pressure to an already faltering fuel pump, cutting off the fuel supply and making it sputter. When the fuel pump can’t supply the correct fuel supply to keep your vehicle operating, especially under more strenuous circumstances, it’s a sign something might be wrong with the fuel pump.

Low fuel pressure

Low fuel pressure can show up in many ways. Is your car misfiring frequently when you start it up for the day? Does it feel like the acceleration is compromised? Do you experience a rough idle when you leave your car sitting and running? Does the engine stall at different points of your drive? You should also pay attention to any dashboard lights that may illuminate any time your car is in operation. The Check Engine light can signify many different problems with the vehicle. The best way to find what it is will be to bring it in for a full diagnostics test, to get to the root of the problem.

Slow acceleration

If the fuel pump isn’t doing its job, it can’t effectively regulate the fuel supply. That means the system might be pulling too much gasoline at certain points, while not enough gasoline at other times. That can cause acceleration to be compromised. If you aren’t getting the necessary supply of fuel, your car won’t perform.

Loss of gas mileage

Tracking your gas mileage is an easy way to determine problems with the handling of your vehicle. By tracking numbers with every fill up, you develop a pattern for how your car operates. You’ll know if mileage suddenly decreases, you have a potential problem. Fuel pumps have a release valve that allows more fuel to flow into the engine if it fails to open. You’ll notice this by having to fill up more frequently. And at today’s gas prices, that can be a massive uptick in your budget.

Engine fail

If you face any of the above conditions regularly and continue to ignore them, eventually, your engine is going to refuse to start. If fuel doesn’t flow into the engine during the starting process, or flows unevenly throughout your entire driving experience, it’s going to impact all of the pieces in the system. That much stress on the fuel supply will cause the car to no longer start.

All signs point to a bad fuel pump?

Don’t ignore it. It won’t go away.

Instead, schedule a visit with one of our mechanics. We’ll inspect it, diagnose the problem, fix it, and have you back on the road in no time.

Give us a call today. Your fuel pump and your vehicle will thank you.

It Might Be a Clogged Fuel Filter

June 24, 2022 by Denver Express Car Care

Your car’s fuel filter isn’t a component you deal with regularly. In fact, it’s easy to ignore.

It’s hidden within your vehicle’s fuel supply system. It’s one of the easiest to overlook, yet also one of the least expensive parts you can maintain.

Most modern day vehicles have two fuel filters. The first is located in the fuel tank, often referred to as a strainer. The other is in the fuel line.

These fuel filters are made from plastic, metal, or coated pleated paper. Fuel filters are designed to trap dirt, debris, rust, and other impurities from the fuel supply, straining it out before moving to the rest of the fuel system. It protects the engine and fuel injectors from harmful particles.

These fuel filters are built with incredibly tight materials to block impurities from moving into the fuel supply. This is critical because modern engines are fine-tuned and can be damaged by even minor intolerances. Any foreign particles that do make their way past the fuel filter have the potential to cause blockages and damage to the engine.

The cost of the fuel filter is minimal compared with the potential damage it can cause.

How do I know if my fuel filter is clogged?

Like other parts and systems on your vehicle, a clogged fuel filter will give our warning signs when it’s compromised. This is where paying attention can help save time and money on potential repairs.

Poor engine performance – poor engine performance is especially noticeable when you push your vehicle while accelerating, or when you add more weight to your load. Do you notice hesitations, surges, or sputtering? This is often caused by fuel restriction. If the fuel supply can’t get through the fuel filter as designed, it will impact every aspect of the way your engine performs.

Trouble starting the car – a clogged fuel filter rarely makes it to the point where it causes problems when starting the car, but if you leave it unchecked, it could be part of the problem. A clogged fuel filter causes erratic flow of gasoline, which results in poor engine performance.

Misfire or rough idle – when driving on a clogged fuel filter, it can lower fuel pressure enough to cause the engine to misfire. You may also notice this in poor gas mileage. If you leave your car idling, it may feel a bit rough, or even cause the check engine light to pop on. If it gets to the point of triggering the sensor, it’s time for a visit to the local repair shop.

Stalling – if your car repeatedly stalls out while you’re moving throughout the day, it’s a sign of a clogged fuel filter. As a clog worsens, it impacts the delivery system of fuel. When fuel can’t make it through the system as desired, it impacts the way your car handles.

How long will fuel filters last?

In general, manufacturers recommend changing out a fuel filter about every 30,000 miles. Of course, it depends on your vehicle. Check your owner’s manual for more details.

This is where maintaining a log can help you with early maintenance. As you get closer to the 30,000 mark, you can start watching for potential problems. Or simply bring your vehicle in for inspection and replace the fuel filter at the first sign of a problem. Being proactive will always benefit you, and prevent problems while driving down the road.

Can you clean a fuel filter?

Many different appliances you use in your daily life have filters that can be cleaned instead of replaced. With a fuel filter, they are made from a thin plastic or paper material that is easily compromised as it’s used. While you will find search results online that direct you how to clean it. For optimal results, it’s better to replace it.

Some fuel filters have metal elements that will direct you in ways to clean it. But the majority of fuel filters are designed to be used once and then replaced.

Changing a fuel filter will impact fuel efficiency

Today’s gas prices are climbing higher and higher. If you’re tired of watching your gas payment take a bigger bite out of your budget, fuel efficiency may be something to think about.

A clogged fuel figure equates to poor fuel efficiency.

A clogged fuel filter allows impurities to flow from the gasoline you pump at the station to all of the various components in the engine compartment. Clogged fuel filters eventually cause engine damage, prevent smooth drivability, and decrease fuel efficiency.

When trying to make the most of every dollar you put into the tank, servicing your fuel filter first will keep the costs down overall.

While manufacturers suggest replacing it every 30,000 miles, you can make it a part of your regular maintenance schedule, replacing it every other year.

Pay attention to how you drive. The more strenuous your drive is on the engine, the more maintenance visits you should schedule. If you do a lot of hauling, drive gravel or dirt roads frequently, or push your vehicle more in your daily commute, staying proactive will ensure the fuel filter stays cleaner and your engine stays healthier.

What fuel filter is best for your vehicle?

Not every vehicle uses the same type of fuel filter. Using your manufacturer’s information will point you in the right direction.

Fuel filters include:

Primary fuel filter – used commonly in diesel fuel systems
Canister fuel filter – shaped like a canister with a filtration system inside
Cartridge fuel filter – they include a cartridge containing the filtration media, structural components, and the fuel filtering parts
Spin-on fuel filter – uses threads to attach to the engine compartment
Inline fuel filter – mounted on the fuel line between the gas tank and the engine
In-tank fuel filter – mounted inside the gas tank

That’s why most vehicle owners leave it to the experts.

If you’re having problems with your vehicle’s performance and you suspect it may be a clogged fuel filter, your best course of action is to schedule a maintenance visit.

We can assess the situation, find the problem, and help get you back on the road as quickly as possible.

What other questions can we answer for you?

This Is Why Your Transmission Is Slipping

June 18, 2022 by Denver Express Car Care

Your transmission is slipping. Even if you have no idea what that means, it just sounds bad, doesn’t it?

In the simplest terms, a car transmission is a gearbox. If you think of the gears and chain on your bicycle, that’s a good place to start.

The parts of a transmission are connected to the engine so that the gear and belt system effectively respond to the power produced by the engine, providing the transmission with momentum.

When you turn the key to start the car, fuel ignites in the combustion chamber. As it ignites, gas and heat expand and push pistons inside the engine’s cylinders. As they move up and down, they spin the engine’s crankshaft. This in turn connects and moves the wheels.

Most transmissions have five or six sets of gears and gear trains (belts or chains) that help a driver operate the vehicle at different speeds. As power moves based on how much gas you give it, the gears move accordingly. Without the transmission, the entire start and stop movement wouldn’t be possible.

How a transmission works

Cars will have a manual or automatic transmission. The only difference between the two is how much participation a driver has in the process. With a manual transmission, the driver pushes a clutch to engage the clutch plates and gear levels, then moves into the desired gear. An automatic transmission has an automatic clutch that performs each movement based on how fast you’re driving.

A gear lever selects and moves gears to connect with the appropriate gear. When engaged, this gear level moves a clutch plate into position to connect with larger gears. This process continues to change and shift gears based on your speed and actions, delivering power from the engine to each of the wheels.

This Is Why Your Transmission Is Slipping

Each gear is shaped with teeth to fully engage as they move. If you hear the engine making a horrible grinding sound, it may be because the clutch plate doesn’t align properly with the gear teeth. While it might be easier to hear if you’re driving a manual transmission, you still can’t ignore the grinding sound as it tries to engage while moving into a higher gear.

What does it mean when your transmission is slipping?

When a transmission is slipping, it can feel like the vehicle is slow in response time. When you press down on the accelerator, nothing happens. It may or may not be accompanied by a noise, such as a clunk, similar to what happens when it changes gears. You may also notice it while driving at a consistent speed, it suddenly slips into a different gear. This can be caused by several things:

Fluid – a transmission operates with transmission fluid to keep the gears well lubricated. If the levels are too low, or there is grime and dirt in the transmission fluid, it might prevent the gears from moving as they should.
Gears – gears work together with teeth grips, connecting with each other as they go around. If those teeth are worn down or contaminated, they may not fully connect and grip.
Transmission bands – these internal bands are used to engage and disengage the gears. Over time, these can wear down and become less effective.
Solenoid – this controls fluid distribution. If the proper levels of fluid aren’t circulating, it impacts every part of the system.
Torque converter – this is the connector piece between the transmission and engine. If it fails or doesn’t operate correctly, the transmission will not operate as designed.

Most transmission slippage problems are from low or worn out transmission fluid

It’s the number one reason vehicles experience transmission slippage. Luckily, it’s also an easy problem to fix.

Most manufacturers suggest replacing transmission fluid every 30,000 to 60,000 miles. Considering transmissions need full replacement around 100,000, that equates to two or three changes before it’s time for a new transmission. Depending on how much you drive each year, that could signal new transmission fluid should be checked and changed every two to three years.

Depending on how your transmission is designed determines how easy the process is. Many systems are completely closed and require professional servicing. Transmission fluid is typically translucent and dark red when new, but will grow even darker as contaminants are introduced.

Like motor oil, transmission fluid can be checked with a dipstick. Pull it out from the filler tube and look at the color. Transparent red means it’s like new. Dark brown signifies it’s time for a fluid and filter change. If it appears light pink, it signifies water or coolant has made it into the system. It’s time for a rebuild or repair.

Can you drive with a slipping transmission?

When trying to decide whether to continue to drive, think about all the things that might be wrong.

If it’s leaking transmission fluid, what’s happening internally without proper fluid levels?

If it’s making a funny noise, how are all the parts interacting?

If you feel the car not engaging at different speeds, does it put you at risk while out on the road?

Can you drive with a slipping transmission? Technically, the answer is yes.

Yet driving with a bad transmission will definitely put you and your vehicle at risk.

Continue to drive, and the damage may escalate. What might have been stopped with a minor repair can quickly escalate.

And if gears slip and won’t engage to help you keep your vehicle under control, it can put you at greater risk for an accident.

If you’re unsure of how bad your transmission problem is, inspecting it will pinpoint the issue and get you back on the road safely once again.

Stop by today and let us inspect your vehicle. We’re here to run diagnostics and fully check your issue to get to the heart of the problem. We’ll help you determine what’s wrong with your vehicle, find a solution, and keep your car operating as efficiently as possible.

Is your car experiencing transmission slippage?