Whining sound BMW F30
My car sounds like airplane taking off on cold starts. It sounds like it when parked or driving. Increasing revs gets louder.
Could it be alternator bearings? The sound is hard to find where its coming from.
Water pump replaced due to bad pulley.
Alternator clutch pulley replaced.
New belt on.
Only pulley has slight movement is AC compressor pulley.
BMW 320d F30 2012