Express Car Care of Denver

"Denver's Best Auto Repair and Quick Lube"

Simple Answers: Air Conditioner

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Question:  Why isn’t my air conditioner blowing cold air?

Express Car Care Answer:  Your air conditioner uses refrigerant to create cold air.  The most common reasons drivers lose their cold air have to do with the refrigerant.

The first reason is not enough refrigerant.  Refrigerant is a gas in the air conditioning system and if there are small holes in a hose, seal or coupler, enough gas can leak out and prevent the system from creating cold air.

Another potential problem for auto owners is contamination.  Over time, the inside of the rubber hoses can deteriorate, and little bits of rubber can clog up various filters and other parts of the vehicle air conditioning system, preventing proper circulation of the refrigerant.  A component of the system could also be worn or broken.  So the first step for drivers who can’t cool their vehicle is a thorough air conditioning inspection, looking for leaks and worn parts.  In fact, Federal law requires an inspection before adding refrigerant.  Some states do not allowing topping off a leaking system.

Once any repairs are made, refrigerant is added.  At the same time, special oil is added to the system.  This oil cools and lubricates various components as it circulates along with the refrigerant.  If you have a refrigerant leak, you also have an oil leak – and it’s important that both be replenished for proper function and protection of your A/C system.

Sometimes overlooked by drivers is the fact that a worn serpentine belt ( which drives the A/C compressor) leads to belt slippage which puts additional strain on the compressor.  Replacing your serpentine belt and belt tensioner on schedule at Express Car Care will extend the life of your A/C compressor and other belt driven accessories.

Come in and see us.

Simple Answers About Winter Tires

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Question:  What is the benefit of winter tires?

Express Car Care Answer:  This is a really good question.  Most new vehicles in Denver come with all-season tires that work pretty well in winter conditions that many drivers may encounter.  First, let’s talk about the things that dedicated winter tires do really well, we’ll touch on all-season tires, and then you should have enough information to help you in your tire selection.

The first thing to take into account about winter is fairly obvious, it’s cold.  The rubber compound used in summer and all-season tires gets a bit hard when the temperatures drop below 45 degrees Fahrenheit or 7 degrees Centigrade.  Winter tires, on the other hand, stay more pliable when the thermometer takes a dip.  This means better dry road traction in the cold.

Ice and snow is the next thing drivers need to consider during the winter.  Some drivers live where there is a lot of snow, a lot of the time.  Extreme winter condition snow tires have a tread design that cuts into and expels deep snow for maximum traction.  These tires have a mountain and snowflake icon on the sidewall of the tire.

If you live in an area where the ice and snow are more moderate, you can still benefit from having winter tires.  Their tread has many small “cuts” called sipes that really help them get a grip on ice.

Now, all-season tires are a year-round compromise between high summer performance and high winter performance.  They just don’t perform as well in extreme conditions as the tires that are dedicated to either summer or winter driving.  For example, winter tires offer 25% to 50% more traction than all-season tires.  And studies have shown that all-season tires can take upwards of 40% longer to stop than winter tires.  This could be enough of a difference to prevent getting stuck or getting in an accident.

So what’s the best tire for you?  Talk to  your service adviser about the conditions you drive in throughout the year and how important performance is to you.  For many drivers that put a premium on handling performance, dedicated summer tires in summer and dedicated winter tires in winter are what they need to satisfy their performance needs.  Other drivers don’t have that same need and all-season tires work well for them.

Whatever you choose, winter tires or all-season, we are ready to mount them for you, come on in and see us.

 

Guide to Battery Maintenance

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In today’s Express Car Care auto care blog, we are focusing on battery maintenance.  Eventually your car battery will fail and you will need to replace it. In fact, 70% of batteries don’t even make it four years.  There are some things drivers can do, however, to make their battery last a little bit longer.

It’s all about the flow of electrical power.  When you start your vehicle, the battery uses power to get your engine cranking.  As your engine runs, your alternator generates electricity to run all your electrical systems:  lights, several computers, anti-lock brake system, traction control, power windows, electronic fuel injectors, stability control, air conditioning, – the list goes on.  Any leftover electricity goes to recharge your vehicle’s battery.

Now, if you were on a long road trip, no sweat – you’d have plenty of time to fully recharge your battery.  But not if you’re making stops around town.  Every time you start your engine, your battery takes that big hit again.  Multiple starts – multiple hits.  By the time you get home, you have less than a full charge.

When the battery is continuously in a discharged state, it loses its ability to fully recharge.  This starts a downward spiral in your battery life.  Now when your battery is on its way to getting this bad, your alternator is working overtime trying to keep it charged.  This causes your alternator to wear out prematurely.  A lot of experience technicians suggest replacing your battery after five years, even though it hasn’t yet failed, just as a maintenance item to extend the life of your alternator.

There is something simple you can do to help your battery last longer – by hooking up a battery charger once a month in the summer and every three months in the winter.  This will ensure your car battery routinely has a full charge.  You can do this less often in the winter because the electro-chemical process slows down when it’s colder and less damage is done when your battery is low.  Computerized battery chargers are real easy to use because they monitor and control the charging rate to keep the battery from overheating while it’s charging.

We recommend that you ask your service adviser to test your battery, so you know how much life is left.  If it’s good but needs a battery maintenance service, he’ll have it cleaned up and make sure the connections and cables are good.  If it looks like you ought to replace it, he’ll help you with a battery that’s right for your vehicle and your driving needs.  Give us a call.

Express Car Care Technician Training

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Our vehicle is a very important part of our life and when it breaks down drivers need to get it back on the road as soon as possible – with the problem fixed right the first time.

If you’ve ever checked into some of the training Express Car Care technicians receive, you may be surprised at how much knowledge and skill goes into diagnosing and repairing a modern day vehicle.

Our engines are more and more powerful, fuel efficient and reliable.  This is all due to engineering.  But the advances in technology come at the price of simplicity.  Modern cars are so much more complex from a mechanical and electronics standpoint, that it can make a drivers head spin.  Vehicles have several networked computers controlling most of the engine functions and many other vehicle functions as well.  Most drivers take all of this sophistication for granted – but somebody has to fix it when it breaks.

It requires a high level of commitment on the part of your friendly and knowledgeable pros at Express Car Care as well.  In addition to the auto mechanic training, there’s also the financial commitment to purchase the diagnostic and repair tools that are needed to complete the repair.

The ability to repair your vehicle requires a strong combination of training and resources and at Express Car Care we are committed to both.  So try to relax the next time you bring in your vehicle for our services.  You’re in good hands.

PCV Valve Replacement

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The PCV valve is a small, inexpensive part that does a big job for Denver and our environment here.  PCV stands for Positive Crankcase Ventilation.  The crankcase is the bottom area of the engine that holds the oil.  When the engine’s running, fuel is burned to generate power.  Most of the exhaust from combustion goes out through the exhaust system.  But some exhaust blows by the pistons and goes into the lower engine, or crankcase.

These hot gases hold about 70 percent of the fuel that hasn’t burned.  This can dilute and contaminate the oil, leading to damaging engine oil sludge.  It can also cause engine corrosion.  At high speeds, the pressure can build up to the point that gaskets and seals start to leak.  Over time, the vented gases will gum up the PCV valve and it won’t work well.  That can lead to oil leaks, excessive oil consumption, and reduced fuel economy.

Fortunately, it’s very easy to test the PCV valve, and it’s quick and inexpensive to replace at Express Car Care in Denver.  Even so, it’s often overlooked because many drivers don’t know about it.  Check in your owner’s manual or ask your service adviser.  If this is the first time you’ve heard of a PCV valve, you might be in need of a replacement.

For the price of a couple of burger combo meals at your favorite drive-up window, you can avoid some very expensive deep engine repairs.  So don’t hesitate to ask questions about PCV valve replacement, give us a call.

Keep It Straight-Wheel Alignment

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Have you ever been in your local grocery store and had one of those shopping carts?  You know, the one with a messed up wheel that wobbles like crazy.  Your cart shakes and pulls to one side and if you’re not careful, it’s clean up on aisle nine.

Wheel alignment on your vehicle is a lot like that.  One or more of your wheels can get out of alignment and you feel a vibration in your steering wheel, which may also be off-center.  Your vehicle might pull to one side and your tires start to wear unevenly.  If you’re not paying attention you could chew through a tire in a few months.

Sometimes wheels get knocked out of alignment by something big like hitting a curb on a bumpy road or slamming into a pothole.  But everyday driving takes a toll too and vehicles naturally lose alignment over time.  That’s why we recommend an alignment check at regular intervals.  At Express Car Care, we offer a full menu of quality auto repair and maintenance services, including wheel alignment.

In your alignment inspection, your friendly and helpful technician will check your tires and your suspension system for damage.  He’ll test your alignment to see if it’s within specifications.  If not, he can make the necessary adjustments to get the wheels of your vehicle all pointing the same direction again.

If your vehicle pulls to one side, or you feel a vibration in the steering wheel, if your tires seem to be wearing abnormally, talk with your service adviser.  You may need to put an alignment inspection at the top of your to-do list.

Give us a call or come in and see us.

Maintenance Free Myth

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Myths start with a grain of truth and are then built up and circulated around with a lot of imagination and very elastic logic.  Unfortunately the internet is a breeding ground for automotive myths.  Some car bloggers recall the vehicles of yesteryear and declare their modern descendants to be virtually maintenance free and that anyone who says otherwise is out to rip you off.

Let’s examine a couple of the more popular myths going around and look at the truth behind them.  The first one is that the chassis no longer needs lubrication for suspension, steering and the drive line.  They declare that any service center who has charged you for lubrication is a charlatan.  The truth on which the myth is based is that most vehicles come from the factory with sealed joints and cannot be greased.  However, there are still some grease points on some cars.  A grease fitting may have been installed in conjunction with a repair.  And most trucks and truck based SUVs still require chassis lubrication.  This is because they are more heavy duty, and proper greasing is still required to keep them running.  Talk to us at Express Car Care in Denver.

Another common myth is that modern cars don’t need tune-ups.  Do cars need tune-ups?  That depends on your definition of a tune-up, which has changed as the technology has progressed.  Before engine control computers, electronic ignition and fuel injection, a tune-up meant replacing mechanical parts that wore out.  You’d manually adjust fuel and air mix and timing.  When those adjustments were off, spark plugs would fail and need to be replaced.

That definition doesn’t apply to modern vehicles.  Auto service centers generally consider a tune-up to be the major service visit recommended by your vehicle’s manufacturer.

Of course you can’t lubricate a sealed joint, or adjust a carburetor if your car doesn’t have one.  You don’t need to change spark plugs every year if your manufacturer says they can go longer.  What are these car bloggers getting so worked up about?

The danger with these maintenance free myths is that they prevent drivers from taking care of the routine preventative car maintenance that manufacturers DO recommend.  Below is a partial list of things you still need to do to take care of your car.  How many of them are really any different today than they were 20 or 30 years ago?

Oil change, cooling system service, transmission service, tire balancing and rotation, wheel alignment, suspension service, power steering service, brake service, engine air filter, fuel filter, belts, hoses, windshield wipers…

You get the picture. Your car or truck is still a machine that needs to be maintained and your technicians have always adapted to keep pace with automotive technology. Don’t let yourself be fooled by those maintenance free myths.

Differential Service

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When you take a corner in your car, the outside wheels have a little bit longer distance to cover than the inside wheels.  This means that the outside wheels have to turn slightly faster than the inside wheels.  This mechanical magic is made possible by the differential.

The differential is what allows the drive wheels to rotate at different speeds during turns without the wheels sticking or jumping.  If your vehicle is a rear-wheel drive, the differential is located on the rear axle.  If you’ve noticed a bulge in the middle of the axle when you’re driving behind a truck, that’s the differential.

If your vehicle is a front-wheel drive, the function of the differential is handled by the transaxle.  Of course, an all-wheel drive vehicle has a differential on both axles.  They also have a center differential or a transfer case between the front and rear axles to compensate for speed differences between the front and rear.

Because all the power of the engine is transferred through the various differentials, you can imagine how strong they need to be and that they’re built to last a long time.  That’s why it’s so important to keep your differential properly lubricated.  Differential fluid cools and protects the gears.

Your service technician will check the differential fluid level and top it off if necessary.  With low fluid, the differential will run too hot and wear prematurely.  Ask your service adviser for the recommended time to change your differential fluid.  Fresh fluid will extend the life of your differential.  Your service technician will also inspect the u-joints, which connect your driveshaft to the differential and he may recommend service.  Some u-joints can be lubricated as part of a routine lube, oil and filter change as well.

Now , of course, differentials eventually wear out and need to be replaced.  You might notice a strange noise from your axle area as one of the first warning signs.  When the differential shows signs of failing, it’s important to repair it quickly.  If you leave it too long and it freezes up when you’re driving, you could lose control of your vehicle, as well as cause damage to other parts like the axle, driveshaft or transmission.

Multi-Tasking

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When asked, most people think they are good at multi-tasking.  Scientific studies, however reveal that only around 2% of the population can truly demonstrate the capacity to effectively multi-task.  For the rest of us who are not so biologically wired, no amount of practice can increase our effectiveness at multi-tasking.  Turns out, multi-tasking is almost a superpower.  Think of fighter pilots:  capable of maintaining their orientation in three dimensional space and performing specific and highly complicated functions while accessing life threatening situations and coming up with an appropriate response.  Admit it – you can’t do that.

Yet when it comes to driving, we seem to think we are very capable of safely operating a motor vehicle with a myriad of distractions.  Seventy-seven percent of young adults feel somewhat confident that they can safely text and drive while fifty-five percent claim it’s easy to text and drive.  Can they possibly be right?  Let’s look at some statistics.

Nearly 23% of all accidents in the United States involve cell phones.  Every day, 11 people are killed and over 900 are injured in texting related accidents.  In fact, texting while driving is six times more likely to cause an accident than driving intoxicated.  Just think back – have you had your own experiences?  How many “near misses” have you had as a pedestrian or in a vehicle that have involved a driver with a cell phone in their hand?

There are three types of driving distractions:

  • Visual (eyes off the road)
  • Manual (reaching for something or manipulating an object)
  • Cognitive ( mind off the task of driving)

Of course, texting or using a cell phone involves all three.  Eating, applying make-up, arguing and working on-board features like the stereo and navigation system are all very real distractions.  You may be interested to know that hands-free cell calls are not substantially safer than using a hand held phone.  Any time you glance away from the road (like looking at a text or incoming phone call) your eyes are off task for at least 5 seconds.  At 55 miles per hour (88 kilometers per hour), you will cover the length of a football field in that time.  Would you ever consent to strapping on a blindfold and driving off down the road for that distance?

So what do you do?  First, accept the fact that you are not part of the 2% of all the people on the planet who can truly multi-task (if you are one of the lucky one you would know by now because your performance does not degrade no matter how many additional tasks are added).  Next, don’t EVER drive distracted.  Incoming text – it will wait for later.  Juicy hamburger, eat it in the parking lot.  No exceptions, ever.

Advice on Your Cooling System

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Last week I was out running errands and my temperature warning light came on – total panic!  I pulled over and my car was overheating.  After I waited for it to cool down, I went right into my Denver service center to have them take a look.  My service adviser at Express Car Care told me my water pump was leaking and needed to be replaced.  He said water pumps just wear out and that they need to be replaced, because they have the important task of pumping the coolant that cools the engine while it’s running.

He told me they checked out my radiator hoses, serpentine belt and tensioner and that they were fine, but I was overdue for changing my coolant – embarrassingly overdue.  I didn’t realize there was a schedule in my owner’s manual for when to change my coolant.  My Express Car Care service professional said that the coolant actually becomes corrosive over time and could damage my radiator, head gaskets, intake manifold gaskets, heater core, metal cooling pipes, expansion plugs,…the list goes on.  That’s why they recommend changing the fluid on schedule.

So after they replaced the coolant with the kind my owner’s manual recommends and after learning a difficult lesson, I was on my way.  It feels good knowing my cooling system is healthy now and I don’t need to worry about it.  At least until my next scheduled coolant change.

Brakes Service

Oil Change

Suspension

Transmision Service

Engine Service

Auto Tips & Tricks