Pulley

Pulley Difference After Drive Belt Change

Pulley Difference After Drive Belt Change
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  • Mark Baldwin
  1. How do you know which pulley is bad?
  2. What causes pulley misalignment?
  3. What does a drive belt pulley do?
  4. Can you drive with a bad pulley?
  5. How do I know if my tensioner pulley bearing is bad?
  6. How much does it cost to replace a pulley and serpentine belt?
  7. What does a bad tensioner pulley sound like?
  8. Is pulley misalignment bad?
  9. How do you align a pulley?

How do you know which pulley is bad?

Symptoms of a Bad or Failing Idler Pulley

  1. Visibly worn pulleys. One of the first symptoms of an issue with an idler pulley is visible wear on the pulley. ...
  2. Belt squealing. Another common symptom of a possible issue with the idler pulley is squealing from the engine belts. ...
  3. Damaged bearing or pulley.

What causes pulley misalignment?

Angular Misalignment

This occurs when pulleys become “tilted” because their shafts are not parallel. Worn bushings and bearings can allow rotating shafts to become cockeyed in their bores. Premature bearing and bushing wear is often caused by the strain of excessive belt tension.

What does a drive belt pulley do?

A drive belt tensioner is a pulley mounted on a spring mechanism or adjustable pivot point that is used to keep tension on the engine belts. Spring tensioners are designed to tension automatically while the pivot design types can be adjusted manually.

Can you drive with a bad pulley?

A damaged pulley can cause the drive or serpentine belt to dislodge. ... 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.

How do I know if my tensioner pulley bearing is bad?

Listen for a fluttering" noise while driving or while the car is idling. This indicates the tensioner is too loose. Other noises such as squealing or whirling from the front of the engine mean the spring inside the tensioner is weakening. In this case, the belt tensioner needs to be replaced.

How much does it cost to replace a pulley and 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.

What does a bad tensioner pulley 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.

Is pulley misalignment bad?

In most cases it is assumed the belt is of insufficient quality while pulley misalignment is in fact the major cause of premature accessory belt failure. Just a few degrees of misalignment can increase a Micro-V® or fan belts' operating temperature by 15°C, reducing belt life by as much as 75%.

How do you align a pulley?

There are two ways to align pulleys: Traditional and laser. Traditional alignment methods are quick but often inaccurate. With these methods, mechanical tools such as straightedges, tape measures, wire, string, feeler gauges, spirit levels and calibrated cones are used.

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