AUTONET TV

Servicing High Mileage Vehicles at A.G. Automotive & Diagnosis

The price of gas and the uncertain economy are both causing CA residents to review their finances. More and more Winnetka drivers are opting to keep their vehicles longer and put off purchasing a newer car. It is estimated that two-thirds of the vehicles on the roads of North America today have over 75,000 miles/120,000 km on them. And the average age of vehicles is now over eleven years. That translates to some car care issues that many Winnetka men and women haven't dealt with in the past.

Older vehicles simply have different maintenance requirements than newer ones. Learning those requirements presents a challenge for people in Winnetka because many owner's manuals only publish maintenance schedules up to 60,000 or 90,000 miles (96,000 or 145,000 km). Vehicle owners have to keep good records and be more involved in planning preventive maintenance if they want to keep their vehicles on the road. First of all, any service in your owner's manual that comes with a recommended mileage interval should be continued at that interval.

For example, if it is recommended that you change your oil every 5,000 miles/8,000 km, you should continue to change your oil every 5,000 miles/8,000 km. The owner of an older vehicle has to recognize that his engine is operating under higher stress than a new one. It's just starting to show its age. So many experts suggest that the “severe service schedule” should be followed once a vehicle has racked up some serious road distance. On this schedule, the mileage interval for many services is shortened or should be performed more often. Check with your service advisor at A.G. Automotive & Diagnosis.

Winnetka drivers who own older vehicles should also be careful not to neglect or postpone oil changes. A full-service oil change is more critical for an older vehicle than for a new one. Older engines have had a lot of time to build up sludge in their oil compartment, so changing the oil at regular intervals is a must. Skipping an oil change compounds the sludge problem. With a full-service oil change, the vehicle's fluids are also checked and topped off. Your service advisor at A.G. Automotive & Diagnosis will also let you know if these fluids need to be replaced. Older vehicles have older seals and gaskets, which often develop tiny leaks. Regularly checking fluids will compensate for these leaks and offer a heads-up about any serious ones. So, again, it is important to stay on schedule and not skip or procrastinate a fluid check.

Older seals and gaskets begin to dry out and show their age by becoming brittle. High-mileage formulation oils and fluids can help extend the lives of these gaskets and seals. These products contain additives that recondition seals and gaskets and keep them from leaking. High-mileage formulas cost more than standard products, but in the long run they can pay for themselves by preventing more costly repair bills.

If a vehicle is getting on in years or mileage, its parts are as well. High-mileage car maintenance requires necessary repairs and replacements. Timing belts, radiator hoses, parts of the suspension system, anti-lock brakes, air bags, water pumps, alternators and batteries will not last forever and will wear out in higher-mileage vehicles. They need to be inspected regularly by your friendly and knowledgeable A.G. Automotive & Diagnosis service advisor and replaced as necessary.

But don't go running for the new car lot just yet. These repairs may sound like a lot, but in total, they're still cheaper for Winnetka drivers than new car payments. And if you stay on top of them and budget for them, they aren't as burdensome as it may appear.

If you plan on driving your vehicle into its high-mileage years, there are two relationships you need to develop. The first is with your Winnetka service center. A.G. Automotive & Diagnosis can offer you invaluable auto advice and help you develop a service plan that is right for you and your vehicle. Second, you need to develop a relationship with your vehicle itself. You don't need to name it, but you should become familiar with its noises and idiosyncrasies. Pay attention to changes in its habits such as new or unusual sounds, smells, vibrations, etc. Taking note of such things and sharing them with your service advisor can help stave off a lot of big-ticket repair issues.

As we get older, keeping up with a diet and exercise plan becomes more and more critical to maintaining good health. It's the same with our vehicles. A preventive maintenance plan and smart vehicle care will keep them on the road and keep them safe for a good many years to come. 

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Timing Belt

Ever heard the sad tale of a staggeringly steep repair bill from a broken timing belt? Bad news. Let's take a lesson from their woes and remember to think about our timing belt.

First, let's review what a timing belt does. The top part of the engine over the cylinders is called the cylinder head. The head contains the valves. There's at least one valve that lets the fresh air into the cylinder. This air, mixed with fuel, burns to create power. Then another valve or two will open to allow the exhaust out of the engine. Each cylinder has 2 to 4 valves - that's 12 to 24 valves for a V-6, up to 32 values on a V-8. The opening and closing of the valves is done by a camshaft. The timing belt uses the rotation of the engine to drive the camshaft which opens and close the valves. It's called a timing belt because it has to be adjusted to rotate the camshaft to keep proper time with the engine so that everything's in sync.

The timing belt is a toothed rubber belt. But some vehicles use a timing chain or timing gears instead of a belt. Timing chains and gears are much more durable, but vehicle manufactures are using belts more because they are quieter - and cheaper. If you have a small or mid-sized passenger car, crossover or mini-van, chances are you have a timing belt.

Unfortunately, timing belts fail without any warning. That shuts your engine down right away. Your pros at A.G. Automotive & Diagnosis can inspect your timing belt and look for cracks and looseness. But getting to the belt to take a look can be almost as much work as changing it on some vehicles. That's why manufacturers recommend replacing the belt from time to time. For most vehicles it's from 60,000 to 90,000 miles or 95,000 to 145,000 kilometers. If your owner's manual doesn't specify an interval, ask your service advisor at A.G. Automotive & Diagnosis.

Someone we know, who shall remain anonymous, has had two timing belts fail. The first was while he was waiting at a stop light - that repair cost several thousand dollars. The second was while driving on the highway - that one cost more than twice as much. Both had the cars out in the shop for three weeks. His cars had what we call "interference engines," meaning that the valves and pistons are very close to each other. If the timing belt slips even one notch, the pistons will slam into the open valves. That's why our friend's highway failure was so much more - his engine was traveling so fast that the valves were smashed and they chewed up the cylinder head.

A non-interference engine will just shut down if the timing belt breaks. You're stranded, but the engine doesn't suffer permanent damage. In both cases, our hapless friend was just a couple oil changes past the recommended interval for changing the timing belt. This is one of those things that Winnetka drivers just cannot put off. Now replacing a timing belt is not cheap - but repairs for a broken belt can be far more expensive.

The team at A.G. Automotive & Diagnosis recommends Winnetka drivers check their owners' manual ASAP - especially if you have more than a 60,000 miles or 95,000 kilometers. You may need to get that belt replaced right away. And on many cars, the timing belt drives the water pump. So, it may be a good idea to replace the water pump while you're at it because 90% of the work required for the new pump is already done with the belt change. Doing both at the same time saves you a lot of money because as they say, "timing's everything."

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Tire Maintenance in Winnetka

With the recent focus in the Winnetka area on improving fuel economy, we've been told how important it is to maintain our tire pressure.

Winnetka drivers know that tires wear out, but we want to make them last as long as possible because they're not cheap to replace. In addition to saving gas, properly inflated tires last longer. Underinflated tires will wear out more quickly.

Some people in Winnetka wonder if they should add a few extra pounds of pressure when they fill up their tires. Bad idea. In fact, there are very good reasons not to overinflate your tires. For one, the middle of the tread will wear unevenly because the full tread is not contacting the road properly. That also adversely affects your handling.

Stop by A.G. Automotive & Diagnosis to see about tire maintenance for your vehicle.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com

Every vehicle in the Winnetka area has a sticker on the driver's side door jamb that tells you the vehicle manufacture's recommended tire pressure. This recommendation is an integral part of the vehicle's suspension tuning. A lot of engineering actually goes into the recommended tire pressure, so it's important for drivers to follow it.

What else do Winnetka drivers need to know about tire maintenance? Tire rotation and balancing are very important. Let's start with rotation. Because the front tires handle the brunt of turning forces, the shoulders of the front tires wear more quickly than the rear tires. At A.G. Automotive & Diagnosis in Winnetka, we rotate the tires so that they all get to do some duty on the front, and they'll all wear evenly over their live.

For most vehicles, front tires are rotated to the rear and vice versa. Others recommend a cross rotational pattern. Some vehicles use an asymmetrical tire so those tires need to stay on either the right or left side – it'll say which on the tire. Some high performance cars have asymmetrical tires and different sizes on the front and rear. These can't be rotated at all. Your owner's manual will have details for your vehicle or ask your service advisor at A.G. Automotive & Diagnosis.

How often should people near Winnetka rotate their tires? Your owner's manual will have a recommendation. Your technician at A.G. Automotive & Diagnosis in Winnetka can do a visual inspection to let you know if it looks like it should be done. The interval is typically around 5,000 miles/8,000 km.

You know, some people don't think new tires need to be balanced. What they aren't taking into account is the wheel. Between the wheel and the tire – even a new tire – there's enough variation to require balancing.

When you add the valve stem and tire pressure monitoring sensors required on new cars, balancing is definitely important. When a tire's out of balance, it's actually hopping down the road. Winnetka vehicles with tires out of balance will feel the vibration through the steering wheel if a front tire's out of balance and through the seat if it's a rear tire.

Proper wheel balance promotes tire life and increases safety for Winnetka drivers and their passengers. Historically, lead weights have been attached to the wheel to bring it into balance. Lead gives some environmental concern, so steel weights are starting to be substituted. 

The team at A.G. Automotive & Diagnosis also wants to remind you that it is important to always use the same size tire on an axle. Different size tires on the front or on the back can lead to some real handling problems. And tire manufacturers recommend that when you get two new tires, they be installed on the rear because that's where you need the most traction to avoid spinning out.

Fuel Injector Cleaning at A.G. Automotive & Diagnosis

In very simple terms, a fuel injector is a valve that squirts fuel into your vehicle engine. Your engine control computer tells the fuel injector how much fuel to deliver as well as the precise time it should be delivered. Of course this happens thousands of times a minute in every single fuel-injected vehicle driving down Winnetka roads.

Most fuel injectors for gas engines are known in the Winnetka automotive community as port fuel injectors because they deliver the fuel to a port just outside the cylinder. The fuel pump provides pressure needed to squirt the right amount of fuel into the engine.

A few have recently introduced gas direct injection systems on some engines. They are now available at some CA dealerships. These systems inject the gas directly into the cylinders under very high pressure – many times the pressure of port injection systems.

Although more complicated, direct injection technology promises greater power with improved fuel economy. CA motorists can expect to see more of it in the future.

High temperatures under your vehicle hood and variations in Winnetka gas quality cause fuel injectors to be fouled with wax, dirt, water, additives and carbon. Injectors can become partially clogged, preventing them from delivering the proper amount of fuel at the correct pressure.

When injectors are dirty, the fuel doesn't burn as efficiently resulting in poor fuel economy and loss of power. So it's wise for Winnetka residents to keep their fuel injectors clean.

Your technician at A.G. Automotive & Diagnosis can perform a fuel system service for you in which the fuel injectors are cleaned so that they operate properly and deliver the right amount of fuel at the right time.

Proper maintenance of your vehicle fuel system means that you will spend less on gas, enjoy strong performance and prevent repair bills down the road.

A.G. Automotive & Diagnosis
19735 Sherman Way Suite 2
Winnetka, CA 91306
(818) 438-9608
http://www.agautodiagnosis.com