Blog - Pawlik Automotive Repair, Vancouver BC

The Challenges of Air Conditioning Repairs

Air conditioning problems occur from one of two areas: the first and most common are mechanical problems and the second are electrical.
Vehicle Air conditioning system
While we attempt to accurately diagnose your air conditioning concerns first time around, using state of the art equipment and skilled technicians, due to the nature of A/C systems this is not always possible.

Generally speaking, electrical problems, once found and repaired give little problem later. Mechanical concerns however are another matter.
The mechanical components of your A/C system include: the compressor, accumulator or filter/dryer, evaporator core and condenser. These parts are all connected by hoses and lines.

Contained within the system is the refrigerant: a special fluid that can change its state from gas to liquid and in so doing, cools the inside of your car.

Leaks are the most common mechanical failure; however compressors will fail and blockages can occur in many areas of the system. Finding leaks and blockages can be time consuming and may require multiple diagnostic procedures, which may include multiple repairs.

It is impossible to be 100% certain of any A/C leak diagnosis due to several factors. These include hidden components such as the evaporator which is contained inside a box under the dash; or leaks that will only show up when the system is fully charged and operating. And sometimes, a leak may only occur when a vehicle hits a bump.

To ensure that we find your problem as efficiently as possible here is a brief outline of the tests that we do:

    Our diagnostic procedures start with a refrigerant identification to be certain that the installed refrigerant is either R12 or R134a. All other types of refrigerants and contaminated refrigerants must be properly disposed of.

    If the refrigerant passes identification then we test system operating pressures: if the pressures are low, there is likely a leak in the system. The refrigerant will then be evacuated and leak diagnosis will follow.

    We utilize several methods for leak detection: nitrogen gas, UV dye, electronic leak detectors & ultrasonic leak detection. Most leaks will be found with these methods however some leaks are very difficult to find due to specific conditions mentioned above (the evaporator for example, which is encased in a box under the dash on most cars).

    If leaks are found we will repair them, refill the system, reinspect for further leaks and if none are noted and the system operates as it should we will return the car to you.

From this, we provide our 1 year/20,000 km warrantee on the components we have replaced and repairs to the leaks that we have found. We cannot be certain that further problems and leaks may not be present: these may show up days, weeks or months down the road. As we always add UV dye to your system this may assist in us finding future leaks.

Further areas of mechanical problems are blockages in your A/C system. These may not be evident until all leaks are repaired and the system is fully recharged and tested. If system pressures are too high or low and/or interior cooling is inadequate, further diagnosis will be required.

As you can see, A/C repairs can be simple or complex, and sometimes require multiple diagnostic and repair procedures. You may perhaps wonder, why not just change the whole system and be done with it? While that is possible, it is cost prohibitive as the air conditioning system consists of many parts distributed throughout your vehicle.

Shocks and Struts

Shock absorbers, or shocks for short and Macpherson Struts, or struts for short are vital components of your vehicle’s suspension system.

To understand the value of these parts, lets look at how they work. All vehicles have a suspension system, which allows the wheels to move up and down independently from the car’s body and frame. Without suspension, every bump in the road would shake and jar you so harshly that walking would be a better alternative than a ride in your car.

The suspension system starts with your wheels: these are attached to your vehicle’s frame with a steering knuckle and a control arm(s); a spring is incorporated to isolate movement and finally a shock absorber to dampen the spring’s bounce. If you have ever driven in a vehicle with worn out shocks you will experience a sickly feeling that comes from excessive spring bounce.

The Macpherson Strut Suspension is a simplified type of suspension system which eliminates the upper control arm and incorporates the shock absorber inside a long tube (strut) along with the spring. While it reduces the number of components, when it comes time to repair, it costs more due to more expensive parts and a larger labour process.

Shocks and struts perform many other critical functions, and while it is obvious when they are fully worn out, replacing them before that happens is critical for safety and to save your money. Many times worn shocks will cause your tires to wear in unusual ways, often damaging tires with otherwise good tread.

Poor shocks also cause your vehicle to dive when braking and this results in longer stopping distances and premature wear to your front brakes. So while replacing shocks and struts may seem unimportant, there are many good reasons to replace them in order to maximize your safety and save your money.

The Business That We Are Really In

As an Auto Maintenance and Repair Shop, the business that we are in is:
Saving You Money.

How so?

That may not seem to make sense, when every visit to your auto service shop takes money out of your pocket. Here’s how we save you money: by keeping your car in great condition.

By doing this, you avoid the expense of a new car. A new car costs money, usually thousands of dollars a year in payments, or if you pay cash, money that depletes your bank account.

The average Canadian car owner spends around $1500 per year to maintain their vehicle. This is an average and the amount will be higher as a car ages. Even if you spent $2000 per year that is half of what you’d pay for a new car.

While it may not be as attractive to spend money on repairs verses buying a new car, consider that the maintenance/repair option leaves money in your pocket; money that could take you on a nice holiday; money to invest to make more money, and so on.

Just remember that car ownership costs money no matter which way you go, and properly maintaining a used vehicle is usually much more economical. As an Auto Maintenance and Repair Shop we are here to help you save your money.

What will you do with the money that you save?

Sticking Gas Pedals

While Toyota is taking a great deal of heat these days for it’s sudden acceleration or sticky accelerator problems let’s put this issue into perspective.

For certain, this is a serious concern, and one that warrants immediate correction. The issue though, is not unique to Toyota. The US NHTSA (National Highway & Transportation Safety Agency) has investigated complaints of this concern for many years from other manufacturers such as Ford and Chrysler.
Sticking Gas Pedals

Through the years I have serviced several cars that have had sticking accelerator pedals: sometimes due to a sticking throttle cable, other times due to a floor mat that holds it down.

While the cable usually requires a shop to repair it, a floor mat caused acceleration problem can be prevented by the car owner. Take the time to be sure that you have only one floor mat on your driver’s floor and that it in no way interferes with the movement of your gas, brake and clutch pedals (if equipped).

Toyota’s problem is different from a simply badly placed floor mat and may well be an electronic issue. How many cars have had the problem? Complaints for Toyota’s concern are approximately 2600 occurrences. There are 43 confirmed deaths with speculation that the real number may be 100.

Interestingly, the NHTSA has fielded 3526 sudden acceleration complaints from Ford vehicles in the past, but there has certainly been very little press about that. Toyota will certainly need to address the concern and it is. After Audi’s poorly handled foray into a similar issue in the 1980’s, where they blamed the drivers, at least Toyota is doing something about it.

As a vehicle owner you must always be prepared for your gas pedal sticking, no matter what kind of vehicle you are driving.

Though it is very unlikely to ever happen, what do you do if you find your car suddenly accelerating?

First off, shift into neutral or press in the clutch on a standard transmission, then shut off the engine; or shut off the engine by turning your key backwards. If your vehicle has a start/stop button, hold the button down until the engine stops. This may take a couple of seconds on this type of vehicle so a shift into neutral is the first step.

Be prepared, and think through your action so that, should you have a sudden acceleration, you are ready to stop.

Extended Oil Change Intervals

In recent years, many vehicle manufacturers have extended their engine oil change service intervals. There are several reasons for this:

    1) Modern engine oils offer superior lubrication.
    2) Environmental concerns about waste oil.
    3) Many manufacturers are offering no cost maintenance when the car is new, and that now makes oil services an expense to them.

While modern technology has brought us superior oils, it has also created very high tech engines featuring dual overhead camshafts run by timing chains, four or more valves per cylinder, and low tension piston rings, all built with very tight clearances.

Twenty years ago, these features would have only been found in a Ferrari or Lamborghini!

The consequence of not changing your oil frequently enough can be devastating to many of these modern engines: miss one oil change and you could eventually be in for very expensive repairs.

Some European cars feature very long oil change intervals: as high as 25,000 kilometers. I can say from personal experience that oil with that mileage on it is very contaminated and definitely not as effective as it should be. What happens in many engines, when oil is left too long is sludge build up occurs. The sludge will eventually block oil passageways and starve components of lubricant, causing them to wear quickly.

After undertaking intense technical research I have found that there is a huge variance of opinion amongst the experts: some say that changing oil every 10,000 kilometers is just fine while others state that anything over 5,000 kilometers can cause accelerated engine wear. In my own experience, along with the information that I have gathered, there are some engines which can tolerate long oil change intervals and still operate fine: they can in fact handle abuse.

Other engines however cannot tolerate any abuse and will die an early and expensive death.

As cars are always changing, with new engine designs continually being introduced, how does one know which engine can take abuse? You don’t: so unless you want to experiment and perhaps end up spending a great deal of money… it is best to keep oil change intervals at around 5,000km for most cars.

The exception – some with large capacities and synthetic oil can go longer.

Testing and Replacing Your Battery Before it Fails!

Sudden battery failure can be a major inconvenience, leaving you scrambling to get your car started.
It always seems to happen just when you really need to get somewhere!

Fortunately there are ways to prevent it from happening and that is with routine battery testing, which is best done at least once per year.

Five years is usually considered old for a battery, though some do live longer. With proper testing, the state of health of the battery can be determined and if it is poor, you could choose to replace it for two reasons: one: with poor health it is likely to fail soon and prevent your car from starting; two: a weak battery puts a strain on your alternator, the device that recharges your battery while the engine is running.

An alternator can be expensive to replace so maximizing its life will reduce your repair expenses.

Will routine inspections of your battery prevent you from being stranded?

No, batteries can die suddenly and alternators wear out naturally, but overall, by performing routine inspections on these components you will save money and reduce stress.

Where Do Your Best Tires Belong?

Where do your best tires go?

Controversy is brewing in the auto service world about the correct placement of your vehicle’s best tires: some say that they belong on the rear axle while others state the front is best.

Where do your best tires go?

This issue usually comes to light when purchasing tires for only one axle on the vehicle.

Most cars on the road are front wheel drive and with this system the front tires are very heavily worked. Most vehicle weight is over the front axle, the front tires steer the car, provide traction on acceleration and must grip hard during braking. Because of these numerous functions, it makes logical sense that your best tires are on the front.

On a rear wheel drive car, the best should also be on the front as they control the vehicle’s steering and most of the braking is done with the front wheels.

There is an argument however that the best tires should be on the rear, because if the rear tires lose contact with the road your car will more easily lose control and spin out.

While in some cases this could be true for the most part the front tires play a far more critical role in vehicle safety. Ideally all of your tires should have approximately the same tread depth and be replaced when the lowest tread is 3mm deep.

Regular service, which includes tire rotation, will prevent you from ever facing the dilemma of where to put your best tires as they will be worn equally and provide the best degree of safety.

Maintaining Your Car to the Highest Standards

Most vehicle maintenance is based upon your manufacturer’s maintenance schedule. There are however many variations between manufacturers that give pause for the question:

Is this schedule thorough enough to truly take proper care of your vehicle?

Consider that all cars are really the same when looking at their construction and operation: they use internal combustion engines, hydraulic brake systems and, whether the transmission is standard or automatic, internal components are mostly the same between brands. Certainly some cars are more refined than others, but at the heart of it, they are all the same.

Why is it then, if all cars are essentially the same, that maintenance schedules and services recommended vary so much between manufacturers? Why, for example, are so many European manufacturers adamant about regularly replacing brake fluid when American manufacturers don’t mention it?

And what about so-called “fill for life” fluids found in many European automatic transmissions? Many of these “lifetime fluids” are the same fluid found in other makes of cars that recommend replacement every 50,000 kilometers.

The answer to these questions lies in several areas.

    First: most manufacturers like to present their cars, at the time of sale, as being low maintenance as this helps make the car more attractive.
    Second: the manufacturer’s engineering department creates the maintenance schedule based mostly on theory of how long components will last. Once the car is exposed to real life wear and tear the theories sometimes miss the mark.
    Third: vehicle manufacturers are in the business of making and selling new cars so ultimately having them last a long time is not really their main concern.

Is there a superior way to service a car? Yes there is: by relying on the knowledge and experience that we auto service technicians have gathered, seeing the real world wear and tear that takes place on cars, and combining that with the best of the different manufacturer’s schedules, we can put together a truly comprehensive maintenance program.

The final part of the equation is you: how do you drive and how much. The ultimate result is a thoroughly maintained vehicle: a vehicle that truly lasts, is more reliable and costs less to run.

Use Your Parking Brake

Use it or lose it.

This saying aptly describes a vulnerability with your vehicle’s parking brake and occurs mostly on automatic transmission cars.

Why automatic vehicles?

Because many drivers do not use their parking brake at all, until one day when they park on a very steep hill. When they try to drive away, the brake remains stuck on.

This occurs because the parking brake is comprised of cables and levers, which, without regular exercise seize up. So use your parking brake regularly to keep it in good shape. Standard transmission vehicles rarely experience this problem because the parking brake is used frequently.

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