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Strange noise

Posted: Fri Jan 16, 2009 9:32 am
by Codhead
I have a 316i E30 1991, when i pull off there is a starnge noise as if one of the belts is slipping I have tightened up the fan belt but it does not make any difference has anyone come across this problem before, or do I just replace all belts and hope it cures it. Could it be bearings in the alternator or viscous fan couplings :?