Harmonic Balancer Wobble
Thread Starter
Instructor
Joined: Oct 2021
Posts: 176
Likes: 10
From: LONG ISLAND NY
Harmonic Balancer Wobble
Hello all,
I am the recent purveyor of a C5 from a forum member. I have been doing my fair share of routine and preventative maintenance when I noticed a new squeal coming from the engine bay. I know C5s are notorious for squeal but this started out of no where. I just removed and cleaned the MAF, Throttle Body, and air filter. So I know I didn't touch or go near any belts to affect them. Attached is a video I took after a short and very squeaky drive. Does this look like HB wobble? I marked the HB with lines to see if there any misalignment and they're all still aligned after a month or so.
I am the recent purveyor of a C5 from a forum member. I have been doing my fair share of routine and preventative maintenance when I noticed a new squeal coming from the engine bay. I know C5s are notorious for squeal but this started out of no where. I just removed and cleaned the MAF, Throttle Body, and air filter. So I know I didn't touch or go near any belts to affect them. Attached is a video I took after a short and very squeaky drive. Does this look like HB wobble? I marked the HB with lines to see if there any misalignment and they're all still aligned after a month or so.
Le Mans Master
Joined: Feb 2021
Posts: 6,510
Likes: 4,356
From: Florida
2025 Corvette of the Year Finalist - Unmodified
2024 C5 of the Year Winner- Unmodified
2022 C5 of the Year Finalist - Unmodified
Hello all,
I am the recent purveyor of a C5 from a forum member. I have been doing my fair share of routine and preventative maintenance when I noticed a new squeal coming from the engine bay. I know C5s are notorious for squeal but this started out of no where. I just removed and cleaned the MAF, Throttle Body, and air filter. So I know I didn't touch or go near any belts to affect them. Attached is a video I took after a short and very squeaky drive. Does this look like HB wobble? I marked the HB with lines to see if there any misalignment and they're all still aligned after a month or so.
I am the recent purveyor of a C5 from a forum member. I have been doing my fair share of routine and preventative maintenance when I noticed a new squeal coming from the engine bay. I know C5s are notorious for squeal but this started out of no where. I just removed and cleaned the MAF, Throttle Body, and air filter. So I know I didn't touch or go near any belts to affect them. Attached is a video I took after a short and very squeaky drive. Does this look like HB wobble? I marked the HB with lines to see if there any misalignment and they're all still aligned after a month or so.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,667
Most squealing is the belts, and then it's usually related to antifreeze being spilled on them, most times due to a T-stat change. I still have my original idler pulleys and tensioner, over 20 years old, 124,000 miles. They wheels have worn to the point that there's a slight wear spot on the plastic on the wheel surface. which consequently causes a very slight diameter reduction!!!. I still have no belt squealing........
Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,213
One of these stethoscopes can help you pinpoint the source. I'd bet on belt tensioner if I had to guess.
https://www.autozone.com/test-scan-a...ve-stethoscope
https://www.autozone.com/test-scan-a...ve-stethoscope
Thread Starter
Instructor
Joined: Oct 2021
Posts: 176
Likes: 10
From: LONG ISLAND NY
Thanks all for the replies. I will take a new video since i thought I attached one. Its instant at start up. All the hash marks I drew on the balancer are still lined up too. Ill change the idle tensioner first and hope thats it. The wobble itself seems very slight but i know everyone saysnit has to jabe literally zero wobble.
