| A/C Belt chirps when compressor first engages [message #369566] |
Tue, 26 April 2022 14:46  |
rjw
Messages: 697
Registered: September 2005
Karma:
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Senior Member |
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I finished rebuilding my dash air (new Sanden compressor, filter dryer, 18 ounces of Duracool & expansion valve + flushed lines, evaporator & condenser). I finished the day before we left on our current trip to Kentucky. It blows cold air and cools the cab sort of OK on the 80+ degree day we had on the way down. It seems to work as well as you can expect a type II system to work.
The only issue is the compressor belt will chirp a bit when the compressor clutch first engages during high way speeds. It does this once every 10 minutes or so which is annoying and potentially damaging to the belt. I am pretty sure the belt is not on tight enough.
I was in a hurry to get everything buttoned up before leaving so I didn't pay too much attention to the tightness of the belt.
There does not seem to be much information in the maintenance manual about belt tension, except:
"Using belt tension checking gauge BT-33-73F (Burroughs Tool) or other suitable gauge check
power steering belt (vehicles equipped with automotive air conditioning MUST have power steering belt
checked and adjusted if necessary first). A used power steering belt should be adjusted to 70-80 lbs.
A new power steering belt should be adjusted to 110-140 lbs."
No mention of air conditioning belt tension and I don't have that tool.
I always just tightened v-belts until they "felt tight enough" and that usually worked.
What do other people do?
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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