Serpentine belt tensioner squeal

2.2TDI · Oct 23, 2014

Hey all, I have this odd squeal going on which i'm pretty sure is from the serpentine belt tensioner... I know the shock is bad so i've ordered a replacement shock in hopes of the problem being just the shock, but i'm not 100%... thoughts?

Here is a video, you can definitely hear the squeal

https://www.youtube.com/watch?v=qtjcuAYd3Y4&feature=youtu.be

yatzee · Oct 23, 2014

sounds like the little idler for the timing belt. Was making a similar sound on my 02 before I had it replaced

2.2TDI · Oct 23, 2014

Huh... I just did the timing belt about a month ago... I should also note that the squeal was there before the timing belt job

Metal Man · Oct 23, 2014

I couldn't make out one noise from another, but you always want to make sure the clutched pulley on the alternator is good. If you replace the tensioner while you have a bad alternator pulley you will ruin your new tensioner.

Ol'Rattler · Oct 23, 2014

Try removing the serpentine belt and running the engine. If the noise goes away, then it is something the the serp turns.

While you have the belt off block the internal fan in the alternator with a screwdriver and try to spin the alternator pulley in both directions by hand. The pulley should turn smoothly in one direction and not turn in the other direction.

meerschm · Oct 24, 2014

Ol'Rattler said:
Try removing the serpentine belt and running the engine. If the noise goes away, then it is something the the serp turns.

While you have the belt off block the internal fan in the alternator with a screwdriver and try to spin the alternator pulley in both directions by hand. The pulley should turn smoothly in one direction and not turn in the other direction.

Probably obvious, but the second paragraph should be done with the engine off, the first with it running.

2.2TDI · Oct 24, 2014

Ol'Rattler said:
Try removing the serpentine belt and running the engine. If the noise goes away, then it is something the the serp turns.

While you have the belt off block the internal fan in the alternator with a screwdriver and try to spin the alternator pulley in both directions by hand. The pulley should turn smoothly in one direction and not turn in the other direction.

I'll give that a try today and give an update on what happens

Jesse_Boyer · Oct 24, 2014

Ol'Rattler said:
Try removing the serpentine belt and running the engine. If the noise goes away, then it is something the the serp turns.

Easier method to determine if the serp belt is slipping is to use a little water on the belt while its running and squeaking. Squirt gun, super-soaker, spray bottle, etc as your weapon of choice works perfectly. You'll know instantly if the belt is the culprit as the noise will vanish.

Ol'Rattler · Oct 24, 2014

Jesse_Boyer said:
Easier method to determine if the serp belt is slipping is to use a little water on the belt while its running and squeaking. Squirt gun, super-soaker, spray bottle, etc as your weapon of choice works perfectly. You'll know instantly if the belt is the culprit as the noise will vanish.

True, but it usually the problem is something turned by the belt, not the belt it's self.

Serpentine belt tensioner squeal

2.2TDI

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yatzee

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2.2TDI

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Metal Man

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Ol'Rattler

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meerschm

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2.2TDI

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Jesse_Boyer

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Ol'Rattler

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