AUTONET TV

Good Timing: Proper Timing Belt Replacement Saves Money for Farmington Drivers

Knowing how their engine works can help Farmington drivers make informed decisions about auto care and prevent repairs to their vehicles. This is especially true when it comes to timing belts.

An engine's power is generated in the cylinders. Inside the cylinder is a piston that moves up and down while the engine is running. Power is generated in a cycle that includes four strokes of the piston. First, the piston drops and a valve at the top of the cylinder opens to let in fuel and air. The piston then rises, which compresses the fuel and air. At this point, the spark plug fires, igniting the fuel and pushing the piston down. This downstroke transfers energy to the engine, which provides the power it needs to run. The piston rises again, and a valve opens to release the exhaust.

All of this movement is orchestrated by a timing belt. The timing belt is so named because it keeps the pistons and valves operating in synch with each other, just as a conductor keeps all of the instruments in an orchestra in time with one another. Thus, the timing belt is critical to the proper operation of your engine.

Not all vehicles in the Farmington area have timing belts. Some have timing chains. A timing chain is more durable and rarely breaks, but timing belts are cheaper, so many use them to save money.

Timing belts wear out and break, so part of preventive maintenance for Farmington drivers is to replace the timing belt on schedule.

The results of failure of a timing belt depend on the type of engine in your vehicle, but they are always inconvenient and can be very costly for Farmington auto owners. If your engine is a non-interference engine and the timing belt breaks, the engine simply stops running. Now that can be an incredibly inconvenient situation depending on where you are driving around Farmington when it breaks, but it won't cause any engine damage. On the other hand, if your vehicle has an interference engine and the timing belt breaks, the valves on your cylinders will actually fall into the path of the pistons. Then things start getting chewed up by the motion of the engine and it will cost thousands of dollars to get everything sorted out again. Compounding the problem is that there aren't any warning signs before a timing belt breaks. A visual inspection of the belt is difficult also. In some vehicles, parts of the belt may be visible, but most vehicles hide the belt under a cover.

The timing belt doesn't even have to break to cause major engine damage. If it slips, even one notch, the result could be engine damage with repair costs in the thousands of dollars.

Our only car care option is to simply replace the timing belt periodically. You can check your owner's manual to find out how often your timing belt should be replaced. Many vehicles need a replacement at 60,000 miles (100,000 kilometers), but the recommended replacement mileage could be as high as 90,000 or 100,000 miles (145,000 to 160,000 kilometers). If your owner's manual recommends replacement at 60,000 miles (100,000 kilometers), however, don't wait until 65,000 miles (105,000 kilometers) to get it done. Remember what you're risking.

Replacing a timing belt is not a cheap part of preventive maintenance for Farmington vehicle owners. The belt is usually difficult to get to and often requires removal of some of the engine accessories. The cost of the replacement, however, is a lot less than what the repairs may cost if the timing belt fails.

For more auto advice on timing belts and other engine components, you can always consult with your service advisor at Darrell's Firestone. When it comes to car care, ignorance is not bliss. It can end up costing you in a big way.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

Fuel Injectors

The last new American vehicles sold in Farmington with a carburetor rolled out of the MI dealerships in 1990. Since then, all new vehicles here in Farmington, and nationally, have had fuel injectors. In very simple terms, a fuel injector is a valve that squirts fuel into your engine. Your engine control computer tells the fuel injector how much gas to deliver as well as the precise time it should be delivered. Of course this happens thousands of times a minute. Fuel injectors deliver fuel far more precisely than carburetors. That translates into better fuel economy and more power for Farmington drivers. Virtually all fuel injectors for gas engines are known as port fuel injectors because they deliver the fuel to a port just outside the cylinder. Port fuel injectors operate at about 40 to 80 pounds per square inch of pressure.

A few vehicle manufacturers have introduced gas direct injection systems on some engines recently. These systems inject the gas directly into the cylinders under very high pressure - hundreds of times the pressure of port injection systems. Although more complicated, direct injection technology promises greater power with improved fuel economy, so MI drivers can expect to see more of it in the future.

As Farmington residents can see, the level of precision required of fuel injectors is very high. It's important that they operate properly in order for your vehicle to run right.

High temperatures under your hood and variations in Farmington gas quality cause fuel injectors to become fouled with wax, dirt and carbon. Injectors can become partially clogged, preventing them from delivering the proper amount of fuel at the correct pressure. The design of each engine requires a specific spray pattern from the fuel injector that might be altered when the injector is dirty. When injectors are dirty, the fuel doesn't burn as efficiently, resulting in poor fuel economy and loss of power. So it is important to keep your vehicle fuel injectors clean.

Skilled service technicians at Darrell's Firestone in Farmington can perform a fuel system service for you. That is a fuel system service - not just fuel injector cleaning. That is because the fuel has a lot of ways to become dirty or contaminated between the Farmington gas pump and your fuel injectors. A fuel system service at Darrell's Firestone starts with a fuel filter replacement. This filter cleans the gas as it leaves the tank. The various parts of the fuel intake system need to be cleaned from time to time to remove harmful gum deposits and varnish. Finally, the fuel injectors are cleaned so that they operate properly for you and deliver the right amount of fuel at the right time.

Our pros at Darrell's Firestone use a process for cleaning your vehicle fuel system that includes state-of-the-art cleaning chemicals as well as some old fashioned scrubbing. Proper maintenance of your fuel system means that you will enjoy strong performance and prevent repairs down the road.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

A Squirrely Problem (Animals Nesting in Engine)

If you park your vehicle outside, you are exposing it to all sorts of critters that would love to use it for nesting, food storage and shelter.  There are plenty of pictures online of people who've discovered there was more than an engine under the hood.  In one case, the driver of an SUV started to smell a slight burning odor when she was driving.  Turned out to be 200 walnuts and a lot of grass had been stored there by some industrious squirrels preparing for the upcoming cold weather. 

The SUV owners had their vehicle inspected not long before this happened, but it doesn't take some animals long to set up house in what they think is the ideal spot to make their winter home.   Obviously, that can create problems.  Squirrels, mice, rats and other small animals can chew through hoses and wires.  Plus what they store as food and nesting material may prevent engine parts from moving the way they are supposed to.  Imagine a radiator fan that won't turn because it's laden with heavy walnuts.  Or the fire hazard created by flammable brush on a hot manifold.

Probably the best solution is to store your vehicle inside a rodent-tight building, but that's no guarantee.  Unfortunately it doesn't take a very big hole or gap for small mice or other creatures to get in.  Some careful sealing with materials like cement or steel wool can reduce rodent access effectively, but they're always looking for access so you can't let down your guard.

If you're not able to store your vehicle inside, you may try spraying lavender or mint essence around the engine or in the wheel wells.  Rodents don't seem to like those odors very much.  If you drive your vehicle every day, you're less likely to have unwanted residents than if you leave it sit for days.  In either case, if you have experienced animal problems in the past, open your hood and inspect your engine frequently. 

Check with your service adviser for recommendations on how to keep animals out of your vehicle.  You're not the only one whose vehicle looks like the perfect winter apartment to some critters.  Preventing animals from getting to your vehicle is worth some time and expense because damage from gnawing teeth can be very costly and difficult to repair.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net

Automotive Tips from Darrell's Firestone: Serpentine Belt Tensioner

The serpentine belt tensioner applies pressure to the serpentine belt, maintaining optimal tension to drive the accessories like the alternator and A/C compressor. At Darrell's Firestone we know that the service life of the belt tensioner is the same as the belt itself, so they should always be replaced together. A worn tensioner prevents the accessories from spinning properly, leading to premature wear and noise for Farmington drivers.

Your vehicle manufacturer has a recommended mileage interval for serpentine belt replacement. A complete accessory drive system service replaces the serpentine belt, the belt tensioner and any idler pulleys your car might have. Your friendly and professional Darrell's Firestone service advisor can inspect your system and let you know if it’s time for a replacement.

Give us a call.

Darrell's Firestone
23534 Farmington Rd
Farmington, MI 48336
248-477-9090
http://www.darrellsfirestone.net