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-   -   Ac compressor noise (http://forums.pelicanparts.com/bmw-6-7-8-series-technical-forum/1008389-ac-compressor-noise.html)

Guido1 09-20-2018 08:00 PM

Ac compressor noise
 
My ac compressor is making a squealing noise at start up.
Are the bearings going bad ??
Pulley ??
Belt ??

wfwright2 09-24-2018 06:34 AM

That description leads to a number of possibilities.
From your list, could be loose, worn belt or belt tensioner going bad.
Could be a fluid leak that wets the belt or pulley that gets cleaned off after a bit.
Could be a clutch or compressor bearing starting to fail, or a clutch bearing that has failed and shuts up when clutch is engaged (the AC compressor clutch of course).
Could also be power steering pump or water pump.
Could be a bad compressor or an overcharged AC that allows liquid refrigerant to get to the compressor.
Need more trouble shooting done.

Sent from my Moto Z (2) using Tapatalk

shogun 10-26-2018 01:18 AM

First of all tell us the 7 model, type, built year


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