What causes serpentine belt to run off crankshaft pulley 99 olds cutlass 3100?

1. What causes a serpentine belt to pop off?
2. What is the crankshaft pulley connected to?
3. What would cause a tensioner to go bad?
4. What causes pulley misalignment?
5. What are the signs of a bad belt tensioner?
6. What causes a crankshaft pulley to break?
7. Should a crankshaft pulley spin freely?
8. How do I know if my crankshaft pulley is bad?
9. What can a bad idler pulley cause?
10. What happens when a pulley goes bad?
11. What happens if tensioner pulley breaks?
12. Should you replace tensioner with serpentine belt?

What causes a serpentine belt to pop off?

The serpentine belt need constant tension on the belt to keep it from coming off. If the belt alignment is not aligned then the belt may come off. The tensioner may be out of alignment and not putting enough tension on the belt. Have a mechanic check the tensioner and replace it if needed.

What is the crankshaft pulley connected to?

The crankshaft pulley is attached to the engine's harmonic balancer and drives the engine's accessories through the use of a rubber belt or system of belts, depending on the year and type of vehicle in question.

What would cause a tensioner to go bad?

Any damage to the automatic tensioner pulley can cause damage to the belt tensioner due to the vibrations caused by the pulley. Physical damage to the pulley is an indication of extreme tension or physical interference.

What causes pulley misalignment?

While all of the pulleys may be running true, one or more of them could be sitting too far forward or back on its shaft. A common source of parallel misalignment is improper installation depth of press-fit pulleys, like those found on power steering pumps.

What are the signs of a bad belt tensioner?

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.

What causes a crankshaft pulley to break?

Another way a pulley can fail is during the fitting process there has been an interruption with the assembly press or the friction bearing has been incorrectly pressed in. This can occur during the making and installation of the part with the vehicle.

Should a crankshaft pulley spin freely?

The camshaft and crankshaft pulleys are directly attached to the engine (camshaft and crankshaft) and will only rotate if the engine is running or manually rotating the engine by placing a socket and breaker bar to the crankshaft pulley bolt. ... If you were able to rotate them bare handed, THEN you would have a problem.

How do I know if my crankshaft pulley is bad?

The most common symptoms of a bad crankshaft pulley are engine vibration and irregular engine idle. It may also result in a damaged alternator, power steering pump, or a failed transmission if you are unlucky.

What can a bad idler pulley cause?

The pulley spins against the belt wearing down both parts. This wear reduces tension which can lead to belt slippage. Even more noticeable is a cracked or damaged pulley or bearing. This damage interferes with the rotation of the belt causing torn belts, or the belt falling off of the engine.

What happens when a pulley goes bad?

A damaged pulley can cause the drive or serpentine belt to dislodge. If that happens, all components that derive power from that belt will stop functioning. On most vehicles, these parts include the alternator, water pump, power steering, air conditioning system, and different exhaust components.

What happens if tensioner pulley breaks?

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.

Should you replace tensioner with serpentine belt?

You should expect to replace your belt tensioner in the 40,000-70,000 mile range. It is also customary to swap more than one part simultaneously, usually a worn-out pulley from other systems and even the serpentine belt itself.