Quick Answer: What Kind Of Noise Does A Bad Idler Pulley Make?

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..

What does a worn idler pulley sound like?

If your idler pulley is worn and the grooves do not hold the belt firmly, you will hear a squeaking noise from the engine. When the bearings are worn, they make a rattling noise. … Another way to detect a faulty pulley is to start the motor and then watch the belt move. A functioning pulley should turn the belt evenly.

How long can you drive with a bad 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.

Why is my pulley making noise?

Belt and pulley noise is usually a screeching sound that has a repetitive pattern screeching on each revolution. The screech can be caused by a worn out belt or by the pulley attached to an engine accessory that is starting to freeze up.

How much does it cost to replace idler pulley?

The cost to replace the idler pulley of your driver belt will usually be somewhere between $80 and $200. The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. These prices do not include added taxes and fees charged by the auto shop.

What does a bad tensioner sound like?

When the tensioner or tensioner pulley fails, the loss of tension can cause the belt and pulleys to make high-pitched rattling or chirping noises. If the pulley bearing completely fails, it can also cause a squealing or even a grinding noise. Symptom 2: Knocking or slapping. … This can cause a slapping or knocking noise.

When should I replace idler pulley?

An idler pulley is expected to wear over time, and eventually the pulley will fail. Replacement intervals for idler pulleys vary, but are usually within the 50,000 to 100,000 mile range. Replacement often coincides with expected serpentine/accessory belt replacement periods.

Can you drive without an idler pulley?

Idler pulleys are engine pulleys that are responsible for guiding and tensioning the engine drive belts. … The idler pulley is an important component of the drive belt system of any car. Without it, you might not even be able to start your car, use your AC, and even steer the vehicle.