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drive belts (ex. serpentine, v-belt)

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Top 10 Bad Car Symptoms You Should Never Ignore
Ignoring car problems costs more than fixing them right away. Never ignore if your car has rough shifting, a shaky steering wheel, or is smoking.
Symptoms of a Bad or Failing Drive Belt Tensioner
Common signs include grinding or squeaking noises coming from the belt, unusual belt wear, and belt-driven accessories like the alternator failing.
How Long Does a Drive Belt Tensioner Last?
In order to keep the proper tension on your vehicle's serpentine belt, a drive belt tensioner is used. This is a pulley that is either mounted to an adjustable pivot point...
How Belt Tensioners Work
The drive belt tensioner in your car is a small component that works in conjunction with the serpentine belt to ensure that everything in your engine works as it should. From time to time,...
How to Buy a Good Quality Drive Belt Tensioner
The drive belt – also known as a serpentine belt – keeps important components of your car’s accessory system running smoothly. The power steering, air conditioning, and sometimes even the water pump,...
Symptoms of a Bad or Failing Serpentine/Drive Belt
Common signs include a squealing noise from the front of the vehicle, power steering and AC not working, engine overheating, and cracks on the belt.
How Do Drive and Serpentine Belts Work?
The drive belt on your vehicle delivers power to the car’s engine, alternator, water pump, power steering pump, and air conditioner compressor. Usually, a car has one or two drive belts, and if there...
How Long Does a Serpentine/Drive Belt Last?
In order to operate, your car needs more than just a working engine and transmission. The “accessories” attached to the engine aren’t really optional. For instance, you need the alternator to...
How to Tighten a Drive Belt
If you have just replaced your drive belt and you are noticing high-pitched squeaking or squealing under the hood, or if you’ve noticed that your drive belt doesn’t seem to...
How to Replace Your Serpentine Belt
If your engine squeals in the morning when you first start it up, take a look at your serpentine belt under the hood. Any cracks, glazed areas, or...
How Long Does a Water Pump Pulley Last?
The pulleys and drive belts on a car help to ensure that everything is getting the power it needs. Without these components working properly, a car will usually not be able...
How to Adjust Drive Belts
Drive belts power electrical systems and other features in your car. An improperly adjusted drive belt can cause damage to your engine.
How to Check a Faulty Timing Belt Tensioner
The timing belt is a critical part of the automotive engine; if it breaks, it can cause some serious damage. The belt can break due to a number of...
Why Serpentine Belt Replacements on Cars With Limited Clearance Can Be Tricky
Changing a serpentine belt is a service that can involve performing some difficult maneuvers on the engine, especially on cars with limited clearance.
How to Check Belts in Your Car
Engine drive belts are a crucial part of how your car functions. Knowing how to identify any issues with them can help prevent a breakdown.
How to Quiet a Noisy Drive Belt
The drive belt operates different accessories mounted on the engine. The best way to minimize it's noise is to adjust the drive belt to specification.
How to Replace a Serpentine Belt
Replacing the serpentine belt can be challenging, as it involves removing the tensioner and determining the correct route to install the new belt.
Understanding All the Drive Belts in Your Car
Your car’s engine has a number of mechanical parts attached to it that perform essential functions like delivering power (the alternator), cooling your engine (the water pump), helping you to drive more easily...

Related questions

Question
I have a lot of squeaking and squealing from the belt area
I would first suggest you check to see if the belt is tight with enough tension. If the tension is not tight or the new belt is too long then replace the belt and tensioner. If tension is good and...
Question
I need to know how many inches to use on a bypass on a certain serpentine belt.
Hi there. Unfortunately, we're unable to assist you with this question. YourMechanic.com provides general automotive repair and maintenance recommendations to site visitors. You might find better resources by completing online searches for serpentine belt replacement tips. Good luck.
Question
How much for a water pump and belt and other small parts installed on a 2002 mercury sable
Billing question was sent to CS for the cost of parts and labor to replace the water pump, drive belt, and associated parts on a 2002 Mercury Sable with a V6-3.0L engine.
Question
Won't start 2008 Chrysler PT Cruiser
Hi there - as you suspect, a failed alternator, or serpentine belt (which drives the alternator) or its tensioner, could have failed and caused the behavior you are now seeing. Even a loose belt due to a weak tensioner could...
Question
Squealing noise when engine is at optimal temperature only happens in gear or given gas.
Hi there. The noise could be either the drive belt being loose or the pilot bearing to the transmission is seizing up. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your squealing...
Question
Battery light and power steering
The power steering pump and the alternator which charges the battery are driven off of the same serpentine belt. Therefore, the first thing to check is the condition of that belt and whether belt tension is adequate. If there is...
Question
My battery light came on its making a real bad whinning noise
Charging system output should be verified against factory specifications as the alternator may have failed which would account for both the noise and the battery warning light. It is also possible that the noise, and a charging failure, could be...
Question
my ml 320 has some noise along the serpentine belt passing thru pulleys my OBD 2 diagnises code P0221 which is for Throttle pedal
These problems are not related. But both problems are quite common on your model car. Your P0221 code refers to the throttle position sensor; a sensor that detects the amount that the throttle itself is open. You might not notice...
Question
Dan, Need to know the following estimates on when to replace Drive Belt and Brake Fluid
For the 2012 4Runner, based on the normal service maintenance schedule Toyota recommends that the brake fluid be replaced every 30,000 miles. Modern serpentine belts are generally good for at least 100,000 miles. Toyota does not have a replacement recommendation...
Question
Sometimes squeals on acceleration but used to be bad on start-ups.
Check the drive belt to the vehicle and see if its cracked or glazed. A cracked or glazed drive belt will squeal when under a load. Also, check the pulleys and see if the bearings are going out. A drive...
Question
Hey what is the part behind the idler pulley on a 2006 Honda Civic? There is a big crack and I want to know what part it is.
Hi there. Seems to be the tensioner to the idler pulley is cracked. Remove the drive belt from the engine and check the pulley tensioner and see if it can move around. I recommend seeking out a professional, such as...
Question
Bad squealing noise 2001 Jeep Cherokee
Hello - there are several possible sources for the squealing noise you are experiencing. These include the serpentine belt tensioner (may not be keeping the belt tight), or a failing alternator, water pump, or power steering pump (putting excess drag...
Question
Annoying loud noise when starting the car.
The noise is the drive belt slipping on the pulleys on the engine. Check the tensioner to see if it feels loose and not tight. If the tensioner is loose, then I recommend replacing it. Also if the belt is...
Question
Rat under Hood.
Of course, you want to be sure that the noise is really from the serpentine belt and/or connected rotating elements. If you simply take all of the belt driven accessories out of the picture by removing the drive belt and...
Question
Scratching squealing sound coming from the belts
It would be best to hire an experienced technician, like the ones we have to offer here at YourMechanic. Our team of mobile experts are eager to assist you. Request a noise inspection and a technician will meet you at...
Question
Will the idler pulley keep my car from cranking . 1999 Mercury Mystique
Hi - a failing idler pulley can certainly keep your alternator from charging properly, resulting in a dead battery, which would prevent the engine from starting of course. The idler pulley bearing may have been failing, or possibly a bearing...
Question
Whats the problem with my truck? 1998 Toyota Tacoma
Hello - you may have an overheated engine, with a blown cylinder head gasket (or other overheating damage) or simply a run-down battery. The same serpentine belt that drives the alternator also drives the water pump. Depending on how long...
Question
Hello my belt is heating up
Drive belts must be properly tensioned, to specific values that are published in the Factory Service Manual, in order to avoid unwanted friction and also in order to properly drive all of the engine accessories. For example, if the water...
Question
Battery light flashes on n car is hard to turn. Then light turns off n I have control of car
Charging system output should be verified against factory specifications as the alternator may be failing or have failed thus accounting for the battery light. It is also possible that the serpentine belt does not have adequate tension and thus is...
Question
Truck squealing when turning the wheel. 1988 Dodge W150
Hello - the first thing to check is the condition of the drive belt for the power steering pump, and if it is correctly tensioned. A good "thumb measure" for proper tightness of the belt is if you can depress...

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