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E36General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.
Your Ride: BMW 328i and Dad's S320*NowLondon underground Tube*
How to get rid of the sound?
Well whenever I switch on the AC, there will be a fan sound which is normal and one sound which really annoys me. There will be a” bearing like sound”. The compressor and the belting are changed recently. What else can it be?
By the way, what do you mean "AC cycling in and out?"
Did you hear the "bearing like sound"?
Yea, I heard it. I had to enhance your video to hear it better but yea there's noise there. AC cycling = when temp is set to a certain temp the compressor "kicks" in & out to remain at that temp. I'ld check with the guys who did the install & ask if they used freon w/oil. If not have them add it. (the oil lubricates the seals & compressor bearings internally & helps the system seals at connections. BMW uses different alloys aluminum, copper, etc & these different metals expand/contract at different rates at different temps, so keeping seals lubricated is critical)
I'm not mad at all, it was pretty funny.. Yea it could be the tensioner - they're notorious for bearing noises too. That you'll have to actually look at for signs of wear (heat marks, small metal shavings possibly, black dust/grime - like what your wheels look like from brake dust - just a few that come to mind) I'm not sure of your AC belt configuration but if it's seperate from water pump & alt, you could always pull the AC belt and see if noise goes away.