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Squeaking belts/tensioner??

Chris97K1500

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Chris97K1500 Enthusiast

Chris97K1500

Posted
Posted

My Brother in laws '02 Tahoe has a pretty bad squeaking sound coming from the engine bay area, constantly, at idle and while driving. At first I thought it was just a loose belt or something that would be fixed with STP Belt Spray. The squeak went away at idle after putting the belt spray on them (probably just for a few days), but it's still there when you rev the engine to about 2K rpm's. It doesn't get louder as you get faster, just a constant high pitch squeal. At this point I'm thinking a bearing is going out. Any ideas? They are still under warranty, so they are going to take it in, but I would like to be able to give them a possible diagnosis, just so the dealer can't tell them just anything. Thanks, Chris

02 Silverado Z71 Enthusiast

02 Silverado Z71

Posted
Posted

Using ANY kind of belt dressing on serpentine belts is a NO-NO! Don't do this. Just makes a mess out of everything. I have seen some of this crap stuck on belts and pulleys - what a mess. I have also seen vehicles TOWED IN because they threw the belt off after sparing this crap on the belt!

Most likely have a noisy belt. Look very closely in-between the ribs on the belt. If you see ANY signs of metal showing in-between the ribs, this condition will cause a squeak.

Don't worry too much, you are still within factory warranty.

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