Express Car Care of Denver

"Denver's Best Auto Repair and Quick Lube"

Changing Serpentine Belt

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Have you ever gone in for a routine oil change and the technician has recommended changing the serpentine belt?  What was your reply?  Did you decline the service with the idea that they were just trying to make more money?  If your trusted technician recommends changing the serpentine belt, you might want to do it and save yourself a lot of trouble later.

First of all, exactly what is a serpentine belt?  The serpentine belt is what powers the alternator, water pump, power steering, and air conditioning.  Making sure your serpentine belt is in good condition and working correctly is essential in keeping your vehicle moving.  A single belt, winding its way through a maze of pulleys drives  every single engine accessory at the same time.  This belt has a lot of responsibility.  Changing Serpentine BeltEvery time the  belt passes around a pulley, it bends and flexes.  This produces heat which causes the rubber to harden over time.  The wear process can be greatly accelerated if the belt is loose or slips because any added friction makes the belt run even hotter.  If you want to lengthen the life of the serpentine belt it is important to make sure it is properly tensioned and that the proper tension is maintained throughout its service life.  Some signs that the tension isn’t correct can be a squealing belt, severe cracking on the belt, or a battery that keeps running down because of a slipping belt.  If you are experiencing any of these symptoms or if your technician recommended changing your serpentine belt the last time you visited him, it’s time for a change.  Don’t take the chance it won’t break on you, because when it snaps, all drive power is lost.  The water pump quits circulating coolant through the engine, the alternator quits producing amps, the power steering pump stops assisting steering and the air conditioner quits cooling.  We don’t want you to suffer the same consequences one of our customers did.  They were told their serpentine belt had a lot of cracks and needed to be changed.  They didn’t want to spend the $90 to $120 dollars that it costs to change the belt and left without the service.  Two days later their car was being towed into our shop and their costs were now much more than the cost of changing the serpentine belt because of the collateral damage the broken belt had caused!  Don’t let this happen to you!  Make that initial investment that will end up saving you money down the road.

Fuel System Cleaning

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We are asked quite a few questions when we recommend a fuel system cleaning.  The most frequently asked questions are:  ” I haven’t noticed any problems so why do I need this service?”  The answer to this question is that most vehicles are equipped with a “knock sensor” which decreases the engine’s performance to prevent harmful knocking conditions.  You might not notice the reduced performance and fuel economy because it happens gradually.  After the fuel system cleaning you may notice a dramatic increase in the performance and fuel economy of your car.

We are also asked, “why does my car need a fuel system cleaning?”  Our cars have fuel systems that have fuel injectors, intake ports, intake valves, combustion chambers, throttle body and an intake manifold.  Each of these areas can have deposits build up that can create problems in the engine.  If you have experienced rough idling, engine stalling or hesitation, loss of power or engine knocking, the problem might be in your fuel system. Fuel System Cleaning

Another question we get is,” what’s the difference between a fuel system cleaning and a tune-up?”  When you have the fuel system cleaned there aren’t any parts replaced.  When you have a tune-up the spark plugs are usually replaced.  The fuel system service cleans the existing parts in the engine so they run like they were new.  Since we haven’t replaced any parts we’re often asked what we actually do to the car.  What our technician will do is attach cleaning tools to the fuel system that clean deposits from the fuel injectors, intake valves and the combustion chamber.  The deposits are also removed from the air intake system.   These deposits occur as a by-product of burning gasoline and need to be removed on a regular basis.  We recommend that you have a fuel system cleaning every 36,000 miles to keep your car running at it’s best.

Quick Oil Changes

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At this time in history it seems that we are moving faster than ever and everything we want, we want it quick!  We even want quick oil changes!  Is there anything wrong with that?  I don’t think so.  There are certain advantages to visiting a quick lube for an oil change.  Of course the most obvious advantage is time.  The average quick lube shop takes 14 minutes to perform a full-service lube, oil and filter change and multipoint inspection.  Fourteen minutes every few months isn’t much time to spend on maintaining your vehicle.Quick Oil Changes

Another advantage of the quick lube is convenience.  It isn’t difficult to find a quick oil change shop, they seem to be on every corner.  That doesn’t mean it’s recommended to pop into just any quick lube.  It’s important that you do some research on the shop that you want to visit.  Find out if they use quality oil and if their service techs are properly trained.  Also make sure they are held accountable to perform quality work on your vehicle.  Most quick oil changes are accompanied by a multipoint inspection.  These inspections can catch things such as headlights or other small bulbs that need to be replaced as well as air filters and cabin air filters(the filter that works for your heat and AC inside the car, although not every car has one.)  An inspection can also alert you to a major repair that might be necessary soon.  (This is the time you want to make sure that the shop you are dealing with is reputable and trustworthy so they aren’t trying to sell you repairs you don’t really need.)  If your quick lube also has an auto repair shop, (like ours) you can set up an appointment to have your car repaired.  One stop shopping!  Getting a quick oil change in a shop like ours is even more convenient because we can also perform major services like a transmission flush or a coolant flush at the same time we’re changing the oil.  So if saving time while maintaining your car is important to you than quick oil changes is the answer you’re looking for!  What do you think?

Shocks and Struts: More Than a Comfortable Ride

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Shocks and struts serve the same purpose,their main function is to keep your car from bouncing.  A car has front and rear springs to cushion it over rough road conditions.  Shocks and struts are designed to help keep your tires on the road.  There is a slight difference between a shock and a strut.

Shocks and Struts: More Than a Comfortable Ride

Installed Shock

Shocks are usually used to depress leaf springs and are usually a single cylinder in the open and a strut is normally surrounded by the coil spring and is bigger and more complicated.  Because of that, it usually costs more to replace a strut than a shock.

Shocks and Struts: More Than a Comfortable Ride

Installed Strut

Shocks are normally used in the rear suspension on a car and struts are on the front.  Some trucks have shocks on both the front and rear.  But they both achieve the same thing.  They control the action of the spring to resist bottoming out, like when you hit a pothole, and keep the movement of the springs under control as they rebound.  Since we have so much road construction going on in our area, potholes are in abundance and if your car continues to bounce long after you’ve hit one, you should have your car inspected for possible shock or strut replacement.

Worn shocks and struts not only affect the comfort of your ride and control of your car, but they affect its braking effectiveness too.  Here is a checklist for the signs of worn shocks or struts:

  • Do you experience excessive bounce ( 3 or more bounces) when crossing an intersection or dip?
  • When stopping quickly, does your car rock back and forth several times?
  • While applying your brakes firmly at higher speeds, does your vehicle have a tendency to drift left or right?
  • When changing lanes quickly does your car rock or sway from side to side?
  • On a tight curve like a freeway ramp, does your car lean and sway giving it an uneasy and disconnected feeling?

If you experience any of these signs you should have your car inspected by a trusted service technician, (like us)!  They can help you correct the problems , prevent further damage to your car, and restore that comfortable ride we are all looking for!

Fact Vs Fiction With Your Car Engine

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In these days of endless information on the internet and Wikepedia, it’s more important to make sure the information we get is based in fact not fiction. It’s fact vs  fiction! We should separate fact from fiction in all areas of our lives including taking care of our cars engine.  With the help of Consumer Reports, I’ve compiled a small list of fact vs  fiction.

Fiction: You have to let your engine warm up for several minutes before you can start driving.

Fact: This advice was true in the past but today’s car engines warm up more quickly when they’re driven.  The sooner they warm up, the sooner they reach their maximum efficiency and performance.  But you shouldn’t rev the engine high during the first few miles while it’s warming up.

Fiction: Switching between conventional oil and other types of oil is bad for my engine.

Fact: Mixing or switching between types of motor oil isn’t harmful to your engine because conventional, synthetic, synthetic blend and high mileage oil are all compatible.

Fiction: If regular-grad fuel is good, premium must be better.

Fact: Most cars will run just fine on regular-grade (87 octane) fuel.  A higher octane fuel (premium) is often recommended for high compression, hotter running engines.  So if your car is designed for 87 octane, you don’t need to use premium, it won’t improve your car’s performance.

Fiction: There isn’t any difference between conventional and synthetic motor oil.

Fact: There aren’t any real differences in the stock base used to make synthetic and conventional oils, but there are differences in the processes used to make each oil and the additives  that they each contain.

Fiction: We should inflate our tires to the pressure shown on the tire’s sidewall.

Fact: The PSI figure on the side of the tire is the maximum pressure that the tire can hold safely.  The automaker’s recommended pressure is usually found on a doorjamb sticker, in the glove box, or on the fuel-filler door.  Check you tire pressure when the tires are cold for an accurate reading.

Fiction: A dealership must perform regular maintenance to keep your car’s factory warranty valid.

Fact: As long as the maintenance items listed in the car owner’s manual are performed on schedule, the work can be done at any auto repair shop.  Just keep accurate records and receipts in case of a warranty dispute on a car repair.

I’m sure this list is incomplete and many more facts vs  fiction could be added.  If you have some to add or any questions that you would like answered, please write a comment and share them with us.  We will do our best to answer them for you.

Motor Oil Types-How to Choose the Right One for Your Car

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When you walk into a quick-lube and ask for an oil change today, you will usually be asked what type of motor oil you want to use.  Because cars have changed, the motor oil we put in them has changed too.  Here are the motor oil types available and a brief description of the difference between them.  This information should help you choose the right motor oil for your car.

Conventional Oil-This is the standard car motor oil.  All leading brands carry a motor oil for service level “SL”.  “SL” refers to a group of lab and engine tests that the oil is put through in order to meet the standards of the American Petroleum Institute (API).  This oil works well in just about every light-duty car on the road.  When you choose this oil it is important to change your oil and filter regularly.Motor Oil Types-How to Choose the Right One for Your Car

Full Synthetic Oil-This motor oil is made for high-tech engines like BMW, Lexus, Corvette, or Mercedes-Benz.  It has superior sludge and varnish protection which keeps the engine cleaner.  It protects your engine from becoming to hot under severe driving conditions and also protects it in cold temperatures because the oil flows faster when the engine is started.

Synthetic Blend Oil-These have a mixture of synthetic oil and organic oil and are formulated to give engine protection for somewhat heavier loads and higher temperatures.  They evaporate less which increases fuel economy.  This type of motor oil is popular with people who drive SUV’s and pickup trucks with heavy loads.  Synthetic blend oil costs less than full synthetic and just slightly more than conventional oil.

Higher Mileage Oil-We are driving our cars longer now and if your cars odometer reads more than 75,000 miles, this type of motor oil would be a wise choice.  This oil is formulated with seal conditioners that restore their shape and increase their flexibility.  Rubber seals are designed to swell enough to stop leaks, this oil helps them do that.  Higher mileage engines can perform differently than new ones, causing oil consumption, decreased engine performance and more rapid oil breakdown.  By choosing higher mileage oil you can reduce oil consumption, improve horsepower and prolong the life of the engine by cleaning buildup and sludge from your older engine.

When you’re trying to determine which type of motor oil to choose for your car, don’t forget to check your owner’s manual and talk to your service technician.  They can give you the best advice for your particular situation!

Car Maintenance Checklist

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Living here in Colorado, we can never tell for sure when the snow might arrive.  In order to prepare your car for winter driving, here is a recommended car maintenance checklist.

  • Check the Hoses-Visually inspect hoses for cracks, leaks or loose clamps and feel them to check for spots that might be brittle or spongy, that means they need to be replaced.  Antifreeze can’t do it’s job if the hoses that carry it through your system are damaged.
  • Flush the Cooling System-The additives contained in the engine coolant (antifreeze) that lubricate and protect engine parts from rust and corrosion are depleted over time.  It’s recommended to have the cooling system flushed and new coolant added every two to five years depending on the car manufacturer.
  • Test the Electrical System-Have your car’s battery tested and make sure that there isn’t any corrosion on the terminals or clamps.  Check all the cable connections to make sure they’re tight.
  • Adjust the Alternator Belt-The alternator is the source of electrical power when your car is running, it also charges the battery.  The alternator belt needs to be adjusted properly.  For older model cars this is done manually.  Newer cars usually have automatic tensioners.  Have the belt checked for wear and cracks which signal it’s time to have it replaced.  It’s a good idea to have a trained auto technician do these services.
  • Windshield Cleaning Tools-Make sure the windshield fluid reservoir is filled with a non-freezing solution.  Check the pump and sprayers to see if they are working properly.  If your wiper blades leave spots or streaks, they should be replaced.  You might want winter wiper blades that have a rubber boot to prevent ice and snow from building up.
  • Check the Tires-Make sure your tires have an adequate tread depth.  You should replace worn tires right away.  Putting snow tires on for the winter is a very good idea.  Check the tire pressure.  When the temperature drops the pressures in your tires will too, so check the tire pressure more often in the winter months than you do in the summer.
  • Brake Inspection and Flush-If you have any existing brake problems, they will get worse in the winter when your traction is reduced.  Have the brakes inspected to make sure they are working properly.  Brake fluid absorbs water and then collects in the system, it can cause rust, fluid leaks or damage to parts.  To prevent this from happening, most manufacturers recommend that the brake system be flushed every two to three years.  Check your owner’s manual for your car’s recommendations.

If you apply this car maintenance checklist, you can keep your car running and hopefully keep a smile on your face all through the winter months.

What Is Antifreeze?

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Antifreeze is the colored fluid, usually red or green, found in your radiator.  It can also be referred to as coolant and serves a few purposes.     What Is Antifreeze? The main purpose for placing antifreeze/coolant in your radiator is to keep the water that is in the engine from freezing in cold temperatures and boiling over in hot temperatures.  The engine of a car produces high levels of heat when it is running, the fluids flowing through the radiator system help to draw some of the heat away from the engine so it doesn’t overheat.  Antifreeze/coolant also has corrosion inhibiting chemicals that prevent rust build up that can take place in the engine of a car.  Radiators are usually filled with a 50/50 mix of water and coolant, since antifreeze/coolant doesn’t evaporate like water does it keeps the levels of evaporation to a minimum.   An added purpose of antifreeze is lubrication, it lubricates the moving parts it comes in contact with, like the water pump.

By properly servicing your car’s cooling system, (which includes changing the antifreeze at recommended intervals), you will help to avoid major engine problems.  If you wait too long to change the antifreeze/coolant, the used coolant can harm cooling system components because the corrosion inhibiting chemicals have been used up and are no longer able to do their job.  The idea is to change the coolant before the corrosion inhibitors reach dangerously low levels.

For regular antifreeze the vehicle manufacturers generally recommend coolant changes every 30,000 miles or every two to three years.  There are also “extended life” coolants that are designed to last 100,000 miles or five years.  But be aware that these “extended life” coolants only provide extended life when used in a clean system mixed with water.  If they are mixed with regular antifreeze or old antifreeze in a system, the corrosion protection is reduced to that of regular antifreeze.

If you are unsure as to whether or not the antifreeze/coolant needs to be changed you can have your service center test it to determine its condition.

What Is a Cabin Air Filter & When Should It Be Replaced?

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Many car owners have never even heard of a cabin air filter and would have no idea when it needs to be replaced if they had!  Hopefully the information here will answer the questions you might have about this unknown filter.

Cabin Air Filter

Dirty Cabin Air Filter

A cabin air filter is a part of your car’s ventilation system that removes pollutants from the air before they can enter the passenger compartment.  Cabin air filters can also be referred to as pollen or dust filters, interior ventilation filters, ACC filters, or passenger compartment filters.  A cabin air filter purifies the air as well as protecting the heater and AC components.  If the cabin air filter is dirty or clogged, the heating or air conditioning performance will suffer as well as the inside air filtration.  When this filter looses its effectiveness, you might notice unpleasant odors or reduced air flow from the cabin vents.  It is recommended to replace this filter at least once a year or every 12,000 to 15,000 miles.  It should be replaced more often if your car is driven in places with heavy pollution or dusty conditions.  Two types of filters are offered for replacement, single stage and multi-stage filters.  Single stage filters trap dust, large soot, and allergens.  Multi-stage filters use activated carbon that reduces toxic gases and odors as well as dust and allergens.  Multi-stage filters are usually the better quality filter and more often recommended.

This filter is a relatively new feature and not all vehicles have one.   If you own a 2000 or newer car, it probably has one.  Cars and trucks in the U.S. began using cabin air filters around 1995, so check your owner’s manual or talk to your repair technician.  Most repair technicians  will be able to tell you whether or not your vehicle has one.   The ease or difficulty of replacing the filter depends on the make and model of your vehicle.  You might have to have it replaced by a technician.  Once you know whether your car is equipped with one or not, then you’ll know if you need to add” check cabin air filter” to the list the next time your car is serviced!

Transmission Trouble

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Has your car lost its get up and go?  Here are five things to look for if you think your car might have transmission trouble.

  1. Lack of Response- Your car shouldn’t hesitate when shifting or refuse to go into gear.  If the engine speeds up when you step on the gas pedal but the car doesn’t, or if the car’s passing gear won’t engage, those could be signs of trouble.
  2. Whining, Clunking or Humming- Your car should shift quietly when it’s running correctly.  The sounds can vary but you should have your car checked if you notice new noises that can begin irregularly then grow in frequency.  If caught early you can avoid costly repairs.
  3. Grinding or Shaking- Your car should shift smoothly from gear to gear.  If you are experiencing any jarring or shimmying when your car shifts you might have transmission trouble.
  4. Check Engine Light- Newer cars have sensors that pick-up small irregularities in the engine and notify the computer that something is wrong.  These sensors can detect vibrations and early problems that you can’t even feel or see.  The check engine light can  also alert you to other issues that might be going on with your car.
  5. Leaking Fluid- Transmission fluid is vital to your car’s shifting ability and should be checked regularly.  The transmission fluid should be bright red, clear and smell sweet if parts are working correctly.  The fluid shouldn’t be dark in color or have a burnt smell.  Unlike motor oil, transmission fluid isn’t burned up so if the fluid level is low it is very possible you could have a leak.  The transmission fluid runs through a filter to help keep it clean.  This  filter should  be replaced according to your manufacturers recommendations so it doesn’t become clogged.   

Just being aware of the signs of possible transmission trouble and looking out for them can help you keep your car on the road and running smoothly.

Brakes Service

Oil Change

Suspension

Transmision Service

Engine Service

Auto Tips & Tricks