A/C tension pulley bouncing like crazy. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blaze69 · 07-01-2009, 08:16 PM

Ok, here's my dilema. When I turn the a/c on and idle the Hoe everything seems to work just fine. If I put a load on the engine and rev up to around 18-1900 rpms then the ac tension pulley goes mad and starts to bounce and bang all around. If I go below that point or above it then the problem goes away.
The a/c gets nice and cold and both the belt and tension pulley assy have been changed. Pressures look good also. I'm thinking it's either the clutch is not staying engaged or the compressor bearings are on the way out. From what I can the compressor is not making any abnormal noises.

Any thoughts???

07-01-2009, 08:16 PM	#1
Blaze69 Registered User Join Date: Apr 2001 Location: Arizona Posts: 147	A/C tension pulley bouncing like crazy. Ok, here's my dilema. When I turn the a/c on and idle the Hoe everything seems to work just fine. If I put a load on the engine and rev up to around 18-1900 rpms then the ac tension pulley goes mad and starts to bounce and bang all around. If I go below that point or above it then the problem goes away. The a/c gets nice and cold and both the belt and tension pulley assy have been changed. Pressures look good also. I'm thinking it's either the clutch is not staying engaged or the compressor bearings are on the way out. From what I can the compressor is not making any abnormal noises. Any thoughts??? __________________ 1969 Blazer: 350/350, 4X4, HEI, Edlebrock carb/intake, dual flowmasters, np205, 3:07's and the rest is mostly stock. The front end disc swap is finally complete 2002 Z71 Tahoe. CAI, Flowmaster 40, Silverstars in high, low and fogs and a bunch of mods (upgrades) inside and out.



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