1969 Corvette c3
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3rd Gear
Joined: Jun 2022
Posts: 3
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1969 Corvette c3
Has anyone ran into the problem of the alternator belt keeps coming loose? Tensioner bolt stays in place. Running out of room on the brace. Thanks
Last edited by eht943; Jun 18, 2022 at 08:00 AM.
Race Director
Joined: Nov 2006
Posts: 13,229
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Belts don't normally stretch much after initial break in. Perhaps a poor quality belt is to blame here. Try a new belt of a different brand.
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
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From: US-PNW
(As an aside, I have Quanta repro alternator belts for both my cars and they are almost too long to allow tension before maxing out the bolt slots. They've worked fine so far but there's no additional tension possible if they start to squeal.)
Melting Slicks
Joined: Feb 2017
Posts: 2,380
Likes: 838
From: New York
2017 C3 of the Year Finalist
St. Jude Donor '20- '21
I had the same issue. I needed to try a couple belts before I found the right one. It seems that just a half an inch would either allow it to fit or be too short or too long.
I Think I ultimately used a 15525 belt from Dayco that was 52.5 inches long.
Good luck Ike
I Think I ultimately used a 15525 belt from Dayco that was 52.5 inches long.
Good luck Ike
Drifting
Joined: Dec 2009
Posts: 1,349
Likes: 34
From: Porterville Ca
While I like my Vette to appear 100% stock, I run a Gates belt on mine. I suspect that the belt from Corvette suppliers that have GM numbers and appear OEM, are probably Chinese junk, I could be wrong. I plan on several long drives this summer and the last thing I need is a broken belt. At least in the old v belt days, belts lasted fairly well and I want that to continue..
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