LS1 Squeaking
Feb 12, 2022 | 09:55 AM
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From: Washington DC
LS1 Squeaking
Hey all,
My buddy’s Trans Am is chirping as the belt goes round. The belt itself seems fine. The squeaking didn’t stop when applying grease to it.
The squeak sounds like it’s coming from passenger side of the engine. I’m guessing tensioner pulley?
70k miles on the car. I’m wondering if there’s a common pulley that goes out first on the LS1.
Thanks!
Feb 12, 2022 | 10:15 AM
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From: Buffalo Texas
Feb 12, 2022 | 10:30 AM
Team Owner
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St. Jude Donor '08-'09-'10-'11
Tensioner pulley. They have a tendency to go bad.
Feb 12, 2022 | 11:05 AM
Race Director
Joined: May 2003
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From: Iowa
St. Jude Donor '03 thru '26
Quote:
Originally Posted by
Pounder
harmonic balancer ????
I too would be looking at the harmonic balancer as they tend to go bad on the LS1. Check for wobble.
Feb 12, 2022 | 12:13 PM
Burning Brakes
Joined: Jan 2021
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From: SW Desert
Do a Google Search for "LS engine lifter squeaking". Plenty of videos to watch and listen to. Hopefully your friend doesn't have a bad lifter.
Feb 21, 2022 | 05:59 PM
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From: Washington DC
Here’s a video my buddy sent me of the squeak. Does this help any of you narrow it down some more?
Feb 21, 2022 | 06:39 PM
Le Mans Master
Joined: Sep 2021
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From: WI
Sounds like mine, I'm going to replace the tensioner pulley and put in a new gatorback belt when it gets warmer out
Feb 21, 2022 | 07:06 PM
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From: Washington DC
Quote:
Originally Posted by
MrMcE
Sounds like mine, I'm going to replace the tensioner pulley and put in a new gatorback belt when it gets warmer out
My buddy pulled his belt off and started spinning pulleys. Sounds like it’s his alternator pulley.
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Feb 22, 2022 | 02:19 PM
Team Owner
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St. Jude Donor '08-'09-'10-'11
My tensioner pulley went bad at 90,000.
Feb 22, 2022 | 02:30 PM
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There is absolutely no way anyone can help you with some minor diagnostics. Belt squeals are difficult to diagnose and it can be almost 12-15 different things.
You have to start trying to narrow it down. I would recommend first taking off the AC belt and see if the squeal is still there. If so, then take off serpentine belt and see if it goes away.
i wouldn’t add “grease” to the belts. You want to get yourself a squirt bottle of water and spray each belt or pulley and see if the noise changes.
9 pulleys, 2 belts…..gotta try and narrow it down.