Constant belt squeak

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.

How do I get my belt to stop squeaking?

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It doesn't change that means the problem is probably a bad bearing in a pulley. If you spray the belt and the noise gets louder your belt tension is probably too tight or it's too loose.

Why won’t my serpentine belt stop squeaking?

A squeaky serpentine belt may indicate a worn, damaged, stretched, or loose belt. It may warn of pulley damage or alignment concerns, or issues with other engine components.

What to put on serpentine belt to 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.

Why is my serpentine belt still squealing?

Belt or pulley misalignment is a common issue that causes changed serpentine belts to still squealing. Misalignment means that the grooves on your belt are not aligned with the ones on your pulley. It also tells that you shift the belt a bit in or out in one of the pulleys.

Can I spray WD 40 on my serpentine belt?

Drive belts should never be sprayed with belt dressing, WD-40, or any lubricant. It is possible for motor oil and coolant to damage a serpentine belt.

Can I drive with a squeaky belt?

That’s why it’s recommended that the serpentine belt is replaced early when the squealing symptoms are first noticed. Although it may be safe to drive with the squealing for a few days or weeks, the belt will eventually need to be replaced, and for safety, the earlier it’s repaired, the better.

How do I know if my belt tensioner is bad?

One of the most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.

How do I know if my pulley serpentine belt is bad?

Symptoms of a Bad Timing Belt Pulley

  1. Shaky, or Otherwise Incumbered Belt Motion. …
  2. Visible Wear On Your Pulleys. …
  3. Belt “Squealing” or “Whining” Noises. …
  4. Knocking or Slapping Noises. …
  5. Damaged Bearings or Pulleys. …
  6. What if the Pulley Seems Fine, But There’s Still an Issue? …
  7. Need to Replace Your Timing Belt Pulleys?


How do you know if a pulley is misaligned?

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Look for the next shortest belt span and spray again where the belt enters the second pulley in the span. If the noise goes away and then returns. You have identified the location of the misalignment.

Can a bad alternator cause belt to squeal?

An alternator’s bearings can become worn and create noises, including a squeal. An alternator with worn bearings will likely produce an insufficient charge to operate the engine and charge the battery. To test for worn bearings, remove the belt and turn the pulley by hand.

Why do my new belts squeal when I start my car?

Belt Slippage



Cold and dew can affect the shape and grip of a serpentine belt. So if you start your vehicle and it squeals for a little while and then stops, this is your issue. This is more likely to occur in older belts, so replacing the belt is the easiest way to go about fixing it.

Can belt tensioner cause squeaking?

Grinding 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. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.

How long can I drive with a squeaky idler 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.

What does a chirping belt mean?

Chirping is a result of belt vibration. This can occur due to improperly aligned pulleys, damp or wet conditions, and/or belt glazing. Minor pulley misalignment can result from excessive manufacturing tolerances or installation errors.

Why is my car making a high pitched squeal?

A high-pitched squeal when accelerating.



If you notice a loud squeal when accelerating, especially if your car is just warming up, it could be that you have a loose or worn fan belt. Usually if your fan belts are worn, it could mean your timing belt needs to be replaced as well.

Why does my car squeak at low speeds?

Your squeak could be a number of things that only experience will help you determine. A failing wheel bearing, brakes are at the end of their life, a rock caught in a dust shield, a bent dust shield, dry u-joint or CV axle and the list goes on. Not to mention, the only way to hear the noise is with the car moving.

Why do I hear a squeaking noise when I drive?

Loose or worn belts are a common cause of vehicle squealing. An old or failing alternator can make squealing sounds. If your car squeaks or squeals while turning the steering wheel, it’s probably the steering system. Brakes squealing is their friendly way of telling you it’s time to get them serviced.