AC Clutch Squealing

[Mike Holleman]

Is it possible that a safety switch in the system is turning the clutch on/off since the system (both sides) are low?

Dave, Be sure you have a good ground to the comp. If it is a one wire add a ground wire to the body of the comp. Sometimes a lack of a good ground will not hold the clutch tightly engaged and you get a squeal.
Mike

[paul67]

I found the idler pulleys touching on mine ,street and performace.

[stewy]

Dave, Be sure you have a good ground to the comp. If it is a one wire add a ground wire to the body of the comp. Sometimes a lack of a good ground will not hold the clutch tightly engaged and you get a squeal.
Mike

Thanks Mike, I'll give that a shot. I did call up Summit and they said that if I got an ok from March Performance, since I purchased it two years ago, that they would replace it. I tried spinning it by hand w/o the belt and it does seem tight. I took it off the car once before charging, but capped it right away with the supplied cap. I had to pull the motor. Plus the lines were capped off, so I don't see how contaminants could have gotten introduced to the system. Ran a vacuum for over 20 minutes before attempting to charge. Perhaps a significant amount of oil was lost when I disconnected the compressor? I remember loosing some, but did not think it was much.

[Mike Holleman]

Thanks Mike, I'll give that a shot. I did call up Summit and they said that if I got an ok from March Performance, since I purchased it two years ago, that they would replace it. I tried spinning it by hand w/o the belt and it does seem tight. I took it off the car once before charging, but capped it right away with the supplied cap. I had to pull the motor. Plus the lines were capped off, so I don't see how contaminants could have gotten introduced to the system. Ran a vacuum for over 20 minutes before attempting to charge. Perhaps a significant amount of oil was lost when I disconnected the compressor? I remember loosing some, but did not think it was much.

I found this out the hard way. On my Tempest with a March serp. setup, I kept having a squeal and thought belt, but new belts and over tightening did not stop it. March said if I was relying on a ground thru their brackets that may be the problem. I took an alligator clip wire link and went from the engine ground to the comp. housing and the squeal stopped.