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#1 (permalink) Old 07-02-2009, 11:10 AM
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Noisy AC Compressor

The AC compressor on my 98 328i is really loud, it makes kind of a grinding/rattling sound. But it works fine, the AC is cold as can be But I am a little embarrased by the sound, does anyone know what is causing it?
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#2 (permalink) Old 07-02-2009, 11:21 AM
OMFG another one!?
 
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witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
I would get it serviced ASAP. Whatever is causing the noise is certain to break; it's only a question of when.

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#3 (permalink) Old 07-02-2009, 11:32 AM
Help from over the pond
 
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lack of oil in the compressor as wite shark says get it serviced, if I were you I wouldnt use it until its done.

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#4 (permalink) Old 07-02-2009, 01:38 PM
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I've done some researching since posting, and it seems like there's a good chance it's the AC belt tensioner. I'll have to check that out when I get home.
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#5 (permalink) Old 07-02-2009, 05:38 PM
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I have a '97 328i that does the same thing. Let us know what you find out.

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#6 (permalink) Old 07-02-2009, 08:47 PM
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Took the belt off to check the tensioner, the tensioner seemed fine, but the belt was shot, so I bought another one. The drive belt was shot too so I bought one of those. Let me tell you, it is the biggest pain in the butt to change the drive belt, the darned tensioner takes a really large star bit, and the tensioner is right in the middle of the assembly. Took me about an hour, and lots of cursing to get that belt back on. Well guess what, with the new belts, the noise is gone! I think what was going on, is the belt was so cracked that the surface was no longer smooth and was vibrating the tensioner. Whatever it was, it's fixed now! Funny how if I would have taken it to a dealer, they would have told me the compressor was shot and needed replaced ASAP, and you know they would have put a new belt on too, so $1,000 later they could say they fixed it when all it needed was a new belt!
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#7 (permalink) Old 07-02-2009, 08:50 PM
OMFG another one!?
 
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Good points! Glad you got it sorted!

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#8 (permalink) Old 07-02-2009, 10:17 PM
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Very nice in deed. Where did you pick up your new belts from?
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