1979 Corvette Squeaking
Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 17
Likes: 0
From: Lake Jackson Texas
1979 Corvette Squeaking
Good morning all,
So let me start off by saying I know this is a pretty vague description, I don't have my Vette in the same city so I am going off of what I remember from driving her around last week.
I've got a 1979 Corvette and had all of the belts, hoses, fluids, etc... changed about 7 months ago when I bought her. Recently I have noticed a loud high pitched squeaking sound when I floor the peddle or get above 65mph on the highway. It sounds to me like it is coming from the engine or potentially the transmission? My first thought was squeaky belts but being as they were all just replaced and that the sound does not appear until my RPMs get up I've almost completely dismissed the idea that it could be the belts. Has anyone experienced a similar problem? Please keep in mind that I don’t have my Vette with me right now so I am unable to answer any detailed questions until I get back to her next week. Also it does not make the squeaking sound at all until I get the RPMs up. I would like to start a think tank so I can address the issue. Thanks!
So let me start off by saying I know this is a pretty vague description, I don't have my Vette in the same city so I am going off of what I remember from driving her around last week.
I've got a 1979 Corvette and had all of the belts, hoses, fluids, etc... changed about 7 months ago when I bought her. Recently I have noticed a loud high pitched squeaking sound when I floor the peddle or get above 65mph on the highway. It sounds to me like it is coming from the engine or potentially the transmission? My first thought was squeaky belts but being as they were all just replaced and that the sound does not appear until my RPMs get up I've almost completely dismissed the idea that it could be the belts. Has anyone experienced a similar problem? Please keep in mind that I don’t have my Vette with me right now so I am unable to answer any detailed questions until I get back to her next week. Also it does not make the squeaking sound at all until I get the RPMs up. I would like to start a think tank so I can address the issue. Thanks!
Burning Brakes
Joined: Dec 2010
Posts: 945
Likes: 10
From: Winston Salem NC
I agree with Casey. It could be a loose belt. My AC compressor belt will do that since it is the longest. I guess at high RPM it has trouble keeping tension. I have a pro6ten compressor and the clutch pulley groove is anodized aluminum.
You might need to use a breaker bar or a pry bar (gently) to properly tension those belts. Belt dressing helps too.
You might need to use a breaker bar or a pry bar (gently) to properly tension those belts. Belt dressing helps too.
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Good morning all,
So let me start off by saying I know this is a pretty vague description, I don't have my Vette in the same city so I am going off of what I remember from driving her around last week.
I've got a 1979 Corvette and had all of the belts, hoses, fluids, etc... changed about 7 months ago when I bought her. Recently I have noticed a loud high pitched squeaking sound when I floor the peddle or get above 65mph on the highway. It sounds to me like it is coming from the engine or potentially the transmission? My first thought was squeaky belts but being as they were all just replaced and that the sound does not appear until my RPMs get up I've almost completely dismissed the idea that it could be the belts. Has anyone experienced a similar problem? Please keep in mind that I don’t have my Vette with me right now so I am unable to answer any detailed questions until I get back to her next week. Also it does not make the squeaking sound at all until I get the RPMs up. I would like to start a think tank so I can address the issue. Thanks!
So let me start off by saying I know this is a pretty vague description, I don't have my Vette in the same city so I am going off of what I remember from driving her around last week.
I've got a 1979 Corvette and had all of the belts, hoses, fluids, etc... changed about 7 months ago when I bought her. Recently I have noticed a loud high pitched squeaking sound when I floor the peddle or get above 65mph on the highway. It sounds to me like it is coming from the engine or potentially the transmission? My first thought was squeaky belts but being as they were all just replaced and that the sound does not appear until my RPMs get up I've almost completely dismissed the idea that it could be the belts. Has anyone experienced a similar problem? Please keep in mind that I don’t have my Vette with me right now so I am unable to answer any detailed questions until I get back to her next week. Also it does not make the squeaking sound at all until I get the RPMs up. I would like to start a think tank so I can address the issue. Thanks!
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Well I fixed mine today. It was my A/C Belt causing the problem. Here is how I found my problem. I would loosen each belt one at a time to see if the starting point of the noise changed. When I loosen the A/C belt It started at 2000. I removed the belt and cleaned the A/C compressor pulley and the crank pulley with some 2000 grit sand paper. Re-tighten and it stopped squealing. I will see how this works in the long run, but so far so good. Seems the pulleys were very polished from the previously worn belt over the past 10 years of use.
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Racer
Joined: Jul 2010
Posts: 430
Likes: 31
From: Ontario
A bar of soap works well for troubleshooting belt noises. Just rub some around the inside of the belt you suspect is the noisy one. If the noise goes away you have a winner. It's a useful maintenance item too. The fan belt is almost new on my 1950 Ford pickup but like the old one it requires a little soap if it's been sitting a while or it chirps and squeaks annoyingly. It has the original 239 flathead in it so I don't think it's slipping from high RPM's 
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
This may be a given but when you re-check the belts, check all of the bolts/nuts securing the accessories as some may have not been fully tightened and come loose. Also check the fasteners on your fan (water pump)