I am at my wits end with this problem. Couple of weeks ago it started to make a slight squeak every once in a while. So I got the belts changed. Didn't help, in fact it got worse. Took it back to the shop and they said it is most likely a bad bearing on the compressor. At this point it was sqealing bad at start up, when I came to a stop, and when I started driving, with the A/C on. But it would pretty much go away once I was up to driving speed.

So I bought a used compressor and had the shop install it. Of course they had to retrofit to R134. Well after $195 worth of work it is slowly starting to make the exact same noise in the same conditions, (a/c on). Please help me and let me know what it could possibly be. I really need to figure this out. Thanks in advance.

David

 

sounds like the Alternator/Ac belt isn't tight enough, under the alternator there two bolts 10mm tight the one on the right toward the belt till the squealing noise stops

 

Thanks. I will try that in the morning.