That is why if you look at the engine belt while the engine is running at idle, it should move smoothly along the system. This can also push the drive belt off the idler pulley resulting in belt travel.
Should a tensioner pulley wobble?
Causes of Belt Tensioner Wobbling In general, belt tensioners tend to get noisy when they fail. You can even remove the belt, spin each pulley, and listen for rumbling or other noises. If the belt tensioner is moving more than it should, there is a good chance it will require replacement.
Why is my tensioner pulley wobbling?
Pulley Wobble If the tensioner pulley wobbles on its shaft, it means the interior shaft bearings have worn. This will cause a pulley misalignment. Bad bearings cause an audible growling noise. The outer ends of the serpentine belt will fray and stretch the belt.
What are the signs of a bad belt tensioner?
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.
Is it bad to drive with a bad tensioner pulley?
Driving with a bad belt tensioner is unsafe since the tensioner is meant to guarantee ample tension that powers accessories. Wear on the belt tensioner will eventually cause the belt to slip, generate loud noise, and also create an unsafe level of heat along the accessory pulleys.
Should my idler pulley wiggle?
We said that the idler pulley should be able to route the engine drive belt in its correct loop. That is why if you look at the engine belt while the engine is running at idle, it should move smoothly along the system.
What does a bad water pump pulley sound like?
Whining or Groaning Noise A whining or groaning noise usually means that either a drive belt is loose, or the water pump pulley is bad. It may surprise your customer that a pulley could fail, but it does occasionally happen. Pulleys have been known to fail due to rust, which can cause cracking between their bolt holes.
What sound does a bad tensioner pulley make?
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.
How does a belt tensioner and pulley work?
The tensioner, harmonic balancer and decoupler pulley work together to keep the belt in contact with grooves in the pulleys. The three components are engineered together to match the engine. If one part is compromised, all of them are compromised, including the belt.
When to replace idler pulley and belt tensioner?
If the automatic belt tensioner has failed (and the engine has a lot of miles on it), it’s probably a good idea to replace the idler pulley (s) at the same time. Why? Because the shaft bearings on all the pulleys will have the same amount of wear.
When to replace serpentine belt tensioner — Ricks free?
A good belt tensioner will dampen the power pulses so much that the tensioner pulley arm barely moves. As the dampener wears the pulses cause the belt to flutter and that can be seen on the pulley arm. A belt tensioner pulley arm should not move more than 1/32”.
What can cause a belt pulley to snap?
• A worn bushing in the tensioner pulley can cause vibrations and noise. If the bushing seizes, it may cause the belt to snap. • A weak or broken spring inside the tensioner can’t maintain proper tension and the belt will slip. Springs lose tension over time from exposure to heat.
