AUTONET TV

Snake in the Engine (Serpentine Belt)

There's a belt that snakes through your engine.  It's even named for a snake, the serpentine belt.  It'll bite you when it breaks, possibly leaving you stranded.  So, it's good to know a little about this snake-like belt.

In early engines, there were lots of belts. They were used to convert the rotating power of the engine to turn a mechanical part.  But engineers had an idea.  Why not consolidate all those belts into one that ran a bunch of different parts simultaneously? Voila!  The serpentine belt.

It's found in the front or side of your engine unlike older belts which were often in a V shape, the serpentine belt has ribs on it which more effectively connect with the pulleys that power the other components.  A serpentine belt may power the water pump, power steering pump, alternator, and the air conditioning: all from one crankshaft. 

Now, all that's fine when everything is working well and the belt is intact.  But when a serpentine belt wears, gets loose, or breaks, it can affect many engine components at once.  Not an ideal situation. 

If you hear squeals coming from the engine compartment, see a battery light, or the engine overheats, those could be signs that your serpentine belt needs replacing.

The good news is that they usually last a long time, from 60,000-100,000 miles or 100,000-160,000 km.  Still, they don't last forever, and your vehicle's manufacturer usually recommends replacing them when they've gone close to the expected maximum.  It’s also recommended that you replace the pulleys and belt tensioner at the same time as they have the same service life. Regular maintenance and inspection of the serpentine belt is not only a good idea; it’s one of those things that you should not let "slip" by.

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

Staying In Charge (Alternator Repair)

Seems like these days, we're hearing about more and more electric or hybrid vehicles.  Keep in mind that conventional gasoline internal combustion vehicles have important electrical components, too, and it's important to make sure they're operating at their peak.

In a vehicle with a gasoline engine, the part that keeps the battery charged is the alternator.  It converts the mechanical energy created by the engine into electrical power.  To do that, a shaft in the alternator has a pulley on one end that's driven by a belt that is turned by the engine.  A series of magnets then spins around coiled wires and it creates alternating current, or electricity. Your vehicle uses that to charge the battery that, in turn, keeps other electrical components in your vehicle working.

Here are a few signs that the alternator isn't doing its job right.  The battery keeps going dead, your instrument panel's battery light is on (it looks like a rectangle with a - and + inside and a couple of "terminals" on top), or your lights are dimmer than they usually are. You may also have a voltage gauge that shows  lower than usual power. If bearings in your alternator are seizing up, you may hear a grinding noise coming from your engine compartment. If you have any of those signs, bring your vehicle to us so we can check your electrical system.

A technician will run diagnostics on your alternator, the cables and the battery. Because the alternator is driven by a belt, the technician will check what shape all the drive belts are in.  Plus, we'll see how much electricity the alternator is putting out. 

If your alternator has failed, it can be replaced with a new or a remanufactured one. Speak with your service advisor about which will best suit your needs. Oh, and keep in mind that sometimes other parts may have to be replaced at the same time. For example, if your alternator's bearings froze up, that may have damaged the drive belt, and it may have to be replaced at the same time. 

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

Braking Good (Brake Drum Replacement)

Maybe your vehicle feels like Breaking Bad.  In other words, when you brake, things are bad.  You may find it takes you a longer distance to stop, you feel a vibration, or it’s pulsating when you depress the brake pedal, or perhaps your vehicle pulls to one side.

Those can be symptoms of failing brake drums.  While a lot more vehicles these days have disc brakes, many vehicles still have brake drums, almost always in the rear wheels. The drum is a cast iron shallow cylinder that surrounds the other parts, including curved brake shoes that press pads against the drum to slow you down or stop the vehicle.

Any time you have things going wrong with your brakes, you should get them fixed soon.  Safely operating any vehicle depends on having the brakes be able to slow and stop you dependably.  It can make the difference between avoiding a collision and having one. 

When you bring your vehicle in, a technician will inspect your braking system. Depending on the wear, drum brakes can be resurfaced or replaced. Sometimes it’s cheaper to replace the drum than to resurface it.  It’s important for all the other brake system components to be inspected first and all worn parts replaced.  

Most of the time, when you have your drums resurfaced or replaced, the brake shoes should be replaced at the same time. You have brakes at each end of your axles, and the same brake service should be done at both ends so that both sides can have consistent, even stopping power. 

Your brakes can save your life.  If their braking power is bad, you owe it to yourself and others on the road to let us help make them good again.  Good and safe.

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

How Cool is That! (Coolant level sensor replacement)

Your vehicle’s engine runs hot.  It should, since it’s a series of little explosions that create the power that gets you going where you want to go.  To keep the engine cool, engineers have designed wonderful cooling systems that use liquid coolant, hoses, and a radiator to transfer the heat from the engine to the outside air. 

In order for the system to work right, it has to have the right amount of that liquid coolant in it.  So that you know when the coolant has dipped below the correct amount, there is a sensor that keeps an eye on it.  When the coolant gets low, that sensor lights up a signal on the dash to alert you.  It may literally say “Check Coolant” or it may have a picture that looks like an old-style bulb thermometer sitting in liquid.  Your owner’s manual will usually tell you exactly what the one in your vehicle looks like.

If that sensor system isn’t working right, you could wind up driving for a long time with not enough coolant in the engine, and the excess heat can cause some extensive—and expensive—damage. 

There are a couple of ways you will know if something’s wrong with your coolant level sensor.  One is when you top off the coolant tank, and the low coolant light stays on.  If you suspect yours might be having a problem, bring it in so we can thoroughly check your coolant system.

If it is a sensor, we can run a test to see where the problem is in your cooling system.  It could be a bad sensor, but it also could be that there is something causing your coolant level to be low.  If the sensor needs replacing, the technician will replace it, fill your coolant level to the manufacturer’s recommended level, and test for any leaks in the system.  Really, how cool is that?

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

test

The Power Behind your Engine (Alternator Diagnosis and Repair)

There's nothing like that sinking feeling when you turn the key and nothing happens in your vehicle.  A lot of us are quick to blame the battery.  But it may instead be your alternator that's failing.

Your battery supplies power to start your vehicle, but the alternator is what sends power when your engine is running.  The good news is alternators last a fairly long time, and it's not unusual to get seven years out of one. But they can give up the ghost thanks to the harsh conditions in the engine compartment.

Alternators have bearings inside them that keep things turning smoothly.  Debris, liquid, dirt and more can team up with the high temperatures your engine generates to cause those bearings to seize up.  That's not good, and if that happens, you may even be able to hear the bearings grind.

Other symptoms of a dying alternator are a squealing noise in the engine compartment or your headlights may go dim and bright, dim and bright.  You might even notice an electrical smell.  Any of these signs warrants a trip to your service facility.

Here's something else to think about.  If your alternator's bearings have seized up and the unit's shaft is not turning freely, that can destroy the belt that's attached to it.  So don't be surprised if your service advisor says both parts have to be replaced. 

There are different grades of alternators you can buy, but consider just how important this part is to keep your vehicle running.  Your service advisor will give you options based on your driving style and vehicle.  Remember, if you notice any of those symptoms that may signal a failing alternator, have it taken care of before you wind up stuck somewhere at the side of the road.

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