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Whine noise from compressor clutch

joeld on Tue November 03, 2009 6:23 PM User is offlineView users profile

Year: 1994
Make: Buick
Model: Le Sabre
Engine Size: 3800
Refrigerant Type: 134

Hey guys. I am "some-what" sure there is a "whine" from the clutch, and to me there is some movement in the pulley when checked with belt removed. The AC system works perfect with no problems, except the low pitch whine.
I did the search and found some good threads with info that will help, but I have one question. The assembly is actually three pieces? The face plate, the pulley, and the coil. The bearing is in the pulley?

Thanks
Joel

GM Tech on Tue November 03, 2009 8:02 PM User is offline

Sounds like a dry bearing??? Is noise present with AND without a/c request? Yes pulley bearing is in the pulley, clutch driver (face plate) must be pulled off with a clutch puller tool, then pulley is pulled off with a pulley puller tool, can be done on car in your Lesabre- I've done a bunch of them- bearing can be replaced, but most opt for new pulley, clutch, or even a new compressor- once they check the price of pulley and clutch assembly. Used parts often work for me-- especially if you can step up a few years...

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

joeld on Tue November 03, 2009 9:22 PM User is offlineView users profile

Yes, the whine is present with AC on and off. The sound is more pronounced with AC off, but it is stilll there with AC on.
Looks like a local price of about $100 on a re-manf clutch assembly, just seems a shame to change out a perfectly good compressor just because of the clutch noise. But I do not trust any car with a whine in the engine compartment.
I assumed this was a fairly easy and simple repair, I've just never had a clutch go bad before.

Thanks
Joel

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