Help- Squeaky belt on startup
Thread Starter
4th Gear
Joined: Jun 2023
Posts: 4
Likes: 1
Help- Squeaky belt on startup
Recently replaced the serpentine belt and the belt tensioner but I still hear squeaking when I start up my car. It eventually goes away, does anyone have any idea what could be wrong?
I have a 07 C6 Ls2 with only 40k miles on it
I have a 07 C6 Ls2 with only 40k miles on it
Le Mans Master
Joined: Oct 2000
Posts: 6,461
Likes: 701
From: Sausalito CA
If the balancer is not wobbling and all the tensioners are replaced, bearing in the alt., ps, ac comp are good...
I'd suggest the pullies are contaminated with oil, grease, and/or debris.
Remove the belt, scuff up the belt routing route (pully grooves) and clean with some contact cleaner.
DO NOT apply any conditioner, lube, wax, or chemical to the belt.
Good luck.
I'd suggest the pullies are contaminated with oil, grease, and/or debris.
Remove the belt, scuff up the belt routing route (pully grooves) and clean with some contact cleaner.
DO NOT apply any conditioner, lube, wax, or chemical to the belt.
Good luck.
Drifting
Joined: Apr 2016
Posts: 1,285
Likes: 609
From: DFW Texas
Exactly the condition that comes with a failing harmonic balancer/dampener. Could also be a pulley, but the HB is the primary suspect given the information you provided.
Let us know what you find?
GD
Let us know what you find?
GD
Race Director
Joined: Dec 2013
Posts: 12,500
Likes: 3,625
Going to go with dry bearing.
You have the tensioner pulley bearing on the main belt, the idler pulley as well, and the rest of the stuff on that belt.
On the second inner belt, tensioner pulley pulley, as well as the Ac compressor clutch bearing.
So if you can figure out which bearing is making noise on start up when it's cold, easy to pull that bearings seal to re-grease the bearing.
You have the tensioner pulley bearing on the main belt, the idler pulley as well, and the rest of the stuff on that belt.
On the second inner belt, tensioner pulley pulley, as well as the Ac compressor clutch bearing.
So if you can figure out which bearing is making noise on start up when it's cold, easy to pull that bearings seal to re-grease the bearing.
Drifting
Joined: Apr 2016
Posts: 1,285
Likes: 609
From: DFW Texas
Jay,
How about an update on what you found to be the problem and how you resolved it? This is the best way to use the forum, to follow up and report back resolution so we all may benefit from experience.
Thanks, GD
How about an update on what you found to be the problem and how you resolved it? This is the best way to use the forum, to follow up and report back resolution so we all may benefit from experience.
Thanks, GD
Thread Starter
4th Gear
Joined: Jun 2023
Posts: 4
Likes: 1
Update
Sorry for taking so long with the update. Two days ago I got changed the harmonic balancer, replaced with a Summit racing balancer, replaced the belt, tensioner, idler, AC belt. So far no squeals or squeaks so problem has been fixed. Although today I jus got check engine light P0442- Evap system leak detected(small leak) so will be looking into that now.
