Embarrasing noise....
Thread Starter
Instructor
Joined: Jul 2003
Posts: 112
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From: Little Elm Tx
Embarrasing noise....
When I get the RPM's up around 4500 or so There is a very loud embarassing squeel from a belt. I do not know wich belt , but I have replaced them all and put belt dressing on them. Does anyone have any ideas? :crazy: :confused:
Instructor
Joined: Jan 2002
Posts: 240
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From: Goose Creek SC
Re: Embarrasing noise.... (Clown Puncher)
It could be that there is built up rubber on the pulleys. Take some coarse sand paper and clean all the pulley groves.
As I was typing this the wife called and said she scraped the C5 on the curb at the drive-in teller window and damaged the paint on the side of the car. :mad :mad :mad :mad :mad :mad :mad :rolleyes: :cry
As I was typing this the wife called and said she scraped the C5 on the curb at the drive-in teller window and damaged the paint on the side of the car. :mad :mad :mad :mad :mad :mad :mad :rolleyes: :cry
Intermediate
Joined: Jan 2003
Posts: 29
Likes: 0
From: Lake Orion MI
Re: Embarrasing noise.... (Clown Puncher)
I have the same problem on my 1974 Coupe, 454/Auto/AC/PS/AIR.
When I purchased the car, the AC didn't work. I had occasional belt squeal. I replaced the PS belt, and tightened the others... no more noise.
This summer, I worked on the AC to get it working again. Part of the repair was a Delco rebuilt compressor. I also relaced all 4 (?) belts with repro belts from Quanta (?). AC works great... belt squeal (very loud) starts at about 3700 - 4000 RPM... only with AC on.
Replaced all belts again with Gates cog style belts... slight improvement. Now I started listening to all of the pulley driven mechanical stuff with a stethescope (sp ?). No noise from any bearings, pulleys, etc. Just belt squeal.
Again now, removed ALL belts one at a time and ran engine for a few minutes between each belt change. Also removed fan clutch. Noise is definitely from AC belt.
The bad news is I still have the noise, but now I have AC! I really don't know what to do next. All of the pulleys look good and appear to be properly aligned... at least to the naked eye. :confused:
If I have any further success, I'll let you know. Does your car have AC?
Le Mans Master
Joined: Apr 2001
Posts: 5,941
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Embarrasing noise.... (Clown Puncher)
have you registered you car on the 71 registry yet? If not please do so it can be found here http://www.71corvette.com/
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Le Mans Master
Joined: Oct 2000
Posts: 8,897
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From: Santa Ana CA
Re: Embarrasing noise.... (Lee74C3)
I have a friend who does 63-67 restorations for a living (and is extremely well respected in this business). I noted this problem to him for my '64 alternator belt. I cleaned it, sanded the pullies, aligned it as best I could, and it still squeeks slightly He said that the trick is to actually put a little angle on the alt (i.e., misalign it slightly). Mine is not too bad and I haven't tried it yet.