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Strange squeaking noise as the engine runs idle?

Tiny
ANONYMOUS
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 159,600 MILES
My car is making a strange squeaking noise as the engine runs idle. The noise is coming from somewhere near the power steering fluid and/or top left corner around the engine. It has been having some problems with running hot and leaking coolant.
Friday, December 7th, 2012 AT 11:15 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The noise you are hearing is likely from the tensioner or the idler pulley of the serpentine belt.
It can also be generated is the belt is slipping due to being glazed over.
If the belt does not have proper tension, it can also make the noise.
Stretched belt due to age will become noisy as well.
Also, if you get coolant on the belt, it will make chirping noise.

Here is a helpful article:

https://www.2carpros.com/articles/car-squeaking-noise

I have attached the belt diagram and replacement as well as noise diagnostics below.

Please let me know of any questions.
Thank you.
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Friday, October 1st, 2021 AT 8:51 AM

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