LS1 Squeaking
Feb 12, 2022 | 09:55 AM
Thread Starter
Advanced
Joined: Jun 2021
Posts: 68
Likes: 8
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
Joined: Jun 2014
Posts: 11,439
Likes: 2,184
From: Buffalo Texas
Feb 12, 2022 | 10:30 AM
Team Owner
Joined: Mar 2007
Posts: 45,954
Likes: 55
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
Posts: 14,136
Likes: 2,984
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
Posts: 872
Likes: 728
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
Thread Starter
Advanced
Joined: Jun 2021
Posts: 68
Likes: 8
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
Posts: 8,342
Likes: 489
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
Thread Starter
Advanced
Joined: Jun 2021
Posts: 68
Likes: 8
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.
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Feb 22, 2022 | 02:19 PM
Team Owner
Joined: Mar 2007
Posts: 45,954
Likes: 55
St. Jude Donor '08-'09-'10-'11
My tensioner pulley went bad at 90,000.
Feb 22, 2022 | 02:30 PM
Instructor
Joined: Nov 2021
Posts: 228
Likes: 63
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.