Quick Answer: Why Does My Serpentine Belt Make Noise?

What are the symptoms of a bad belt tensioner?

Symptoms of a Bad or Failing Drive Belt TensionerGrinding or squeaking noise from the belts or tensioner.

The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner.

Unusual belt wear.

Another symptom of a potential problem with the drive belt tensioner is unusual belt wear.

Belt-driven accessories fail..

How expensive is it to replace a serpentine belt?

It is very inexpensive to replace a serpentine belt whether it’s broken or loose. The replacement cost is only going to be between $100 and $200 in most cases. The belt itself will cost between $25 and $80 while the labor costs will probably be between $75 and $120.

Can you drive with serpentine belt off?

Under no circumstances can you drive a vehicle without a serpentine belt because the serpentine belt serves the important function of delivering antifreeze to important parts of the engine. The serpentine belt drives the water pump, and without it, there is insufficient coolant flow to maintain the engine temperature.

Can I put WD 40 on a squeaky belt?

Spray just enough WD-40 onto the belt to lightly cover the area where the squeal occurs. Oversaturating the belt will result in severe slipping, which can permanently damage the belt. WD-40 is a water displacement lubricant and should remove the moisture from the belt ribs.

Is a serpentine belt the same as a timing belt?

Timing Belt. Don’t get confused—a serpentine belt is not the same thing as a timing belt. The serpentine belt and timing belt have very different functions in your vehicle. The timing belt is located inside the engine and keeps the crankshaft and camshaft in sync.

How much does it cost to replace tensioner and serpentine belt?

If the tensioner goes out, then your belt is going be loose or fall off, and your engine won’t work as it should. To get the belt tensioner replaced, you will pay anywhere from $140 to almost $400. The price of parts and labor varies from one car to the next, with most labor costs coming in at about $70 or $80.

What sound does a bad tensioner pulley make?

Squealing. When the engine is idling, a bad pulley may make a squealing sound. This is due to the bearings in the pulley going bad. The bearings may also make various other sounds such as clattering or even a rumbling sound, making the vehicle sound as if there was much more wrong than a bad pulley.

Does a bad belt make noise?

The noises are caused by vibrations, much like bowing violin strings, and could be early-warning signs of belt failure. The noises are most often caused by poor belt tension. Because belts are made of reinforced rubber, they can stretch over time.

When I start my car I hear a loud screeching noise?

Most often, the belt screeching occurs at cold start: when the car is started after being parked for at least four or five hours. Start the car while it is cold and turn the AC off and on. … If that causes a change in the squealing sound, then the culprit is the belt that drives the alternator.

What noise does a bad serpentine belt make?

Symptoms of a broken serpentine belt include loud slapping, squealing or knocking noises coming from under the hood. The battery-shaped charging system warning light might also come on because the alternator will stop charging the battery. If a car has a hydraulic power steering pump, the steering will become stiff.

How do I make my serpentine belt stop squeaking?

WD-40 is a water displacement lubricant and should remove the moisture from the belt ribs. In most cases, removing the moisture will stop the squeal. Allow the engine to run for a few minutes, then spray rubber dressing, also known as belt dressing, onto the belt in the same manner employed above.

How do I know if my serpentine belt is worn out?

If you suspect your serpentine belt is failing, watch out for the following symptoms:Squealing noise from the front of the vehicle. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt. … Power steering and AC not working. … Engine overheating. … Cracks and wear on the belt.

How many years does a serpentine belt last?

With that being said most serpentine/drive belts can last for a very long time before they need to be replaced. The lifespan of the belt will depend mostly on the type of material it’s made of. Older style belts generally last about 50,000 miles, while those made from EPDM can last up to 100,000 miles.

How long can you drive with a bad tensioner pulley?

So, how long can you drive with a bad idler pulley? The safety recommendation is not to drive the car at all and take it to a mechanic immediately. You should be concerned if the vehicle makes squeaking or rattling noises. The car can still run for months or break after a few days.

Will soap stop a squeaky belt?

Sometimes a belt will squeal upon starting a vehicle and will disappear shortly thereafter. … That’s right, ordinary bar soap can usually stop the squealing when rubbed on a fan belt. Just a few rubs on the belt with bar soap can solve the bar squealing problem for quite some time and save money in the process.

Why is my belt making noise?

Your engine belts make a screech or squeal noise usually because the rubber belt is slipping on the metal pulley and just like your tires spinning on the road, this causes noise. The belt may be slipping due to improper tension or because it simply has gotten old and the surface has become glazed, cracked or brittle.

Will a new serpentine belt improve performance?

If your old belt was glazed and slipping, then yes. The new belt does not slip therefore everything is turning and generating at full capacity, hence the improvement you see. Not really. All of your accessories(power steering, air-conditioning, etc.)

What are the symptoms of a bad idler pulley?

Symptoms of a Bad or Failing Idler PulleyVisibly worn pulleys. One of the first symptoms of an issue with an idler pulley is visible wear on the pulley. … Belt squealing. Another common symptom of a possible issue with the idler pulley is squealing from the engine belts. … Damaged bearing or pulley.

Will serpentine belt make noise?

Worn/Cracked Serpentine Belt – Serpentine belts have grooves which fit into grooves in the pulleys. Over time, the friction wears down these grooves, resulting in a loose fit. A worn belt can, therefore, begin to slip, which is one of the causes the squeal. Alternatively, cracks can cause the belt to snap.

Can I use belt dressing on a serpentine belt?

Should I use belt dressing on my serpentine belt? Yes. You should apply it to the grooved side of the belt every 3,000 miles or with every oil change. Doing this will help prolong the life of your belt and prevent any belt slip problems.