LS2 belt squeal
Thread Starter
Pro
Joined: Apr 2006
Posts: 628
Likes: 1
From: Charlotte area NC
LS2 belt squeal
I put a LS2 in my 65 Coupe and have a belt squeal, everything looks aligned. I spray some belt dressing on it and it stops for a minute or so. Anyone have a tip to track down what is making the belt squeal? I do not have much experience with these belt systems.
Thanks Tim
Thanks Tim
Thread Starter
Pro
Joined: Apr 2006
Posts: 628
Likes: 1
From: Charlotte area NC
Step one will be getting a new Goodyear Gatorback belt, they say these are the only ones that work. Second will be the tensioner. Thanks for the tips. Tim
Instructor
Joined: Feb 2007
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My suggestion is to check that all pulleys are properly seated. I don't own a vette, but I had a similar problem with my Silverado when I swapped in the 6.0L. The power steering pump pulley was not seated by 1/16 of an inch and it would squeal like a stuck pig. I went through 2 or 3 belts before I found the problem.
BTW, the new belt would quieten the squeal for about 50-70 miles, but it would return. Belt dressing would quieten it for a few seconds.
Good luck
BTW, the new belt would quieten the squeal for about 50-70 miles, but it would return. Belt dressing would quieten it for a few seconds.
Good luck
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
Make sure the crank pulley is running true. With the engine running the ribs of the pulley should look stationary with a flashlight. It should have zero wobble. The flexible coupling in mine was bad and the pulley had to be replaced. Would start to chirp 70 miles into a new belt.
Thread Starter
Pro
Joined: Apr 2006
Posts: 628
Likes: 1
From: Charlotte area NC
My suggestion is to check that all pulleys are properly seated. I don't own a vette, but I had a similar problem with my Silverado when I swapped in the 6.0L. The power steering pump pulley was not seated by 1/16 of an inch and it would squeal like a stuck pig. I went through 2 or 3 belts before I found the problem.
BTW, the new belt would quieten the squeal for about 50-70 miles, but it would return. Belt dressing would quieten it for a few seconds.
Good luck
BTW, the new belt would quieten the squeal for about 50-70 miles, but it would return. Belt dressing would quieten it for a few seconds.
Good luck
Tim
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Thread Starter
Pro
Joined: Apr 2006
Posts: 628
Likes: 1
From: Charlotte area NC
Make sure the crank pulley is running true. With the engine running the ribs of the pulley should look stationary with a flashlight. It should have zero wobble. The flexible coupling in mine was bad and the pulley had to be replaced. Would start to chirp 70 miles into a new belt.
Tim
Instructor
Joined: Feb 2007
Posts: 188
Likes: 0
Thread Starter
Pro
Joined: Apr 2006
Posts: 628
Likes: 1
From: Charlotte area NC
Tried it and it worked only for a few minutes. I'm from the V belt days, so I will remove the belt, buy a Goodyear Gatorback belt, they say those are the ones that work. I'll check the pullies to see if they are seated and spin straight as well without noise. The next will be the tensioner will be replaced. I'm hoping one of those does the trick. Thanks for the help. Tim
