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Old 01-06-2013, 03:02 PM
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Location: Claremont California
 
Join Date: Mar 2010
Posts: 1,078
Mein Auto: 2005 545i
Quote:
Originally Posted by pcy View Post
Since you said the problem started after the alternator was replaced and new belt was installed, are you absolutely sure the alternator pulley (on the new alternator) is correct one and in perfect condition? Also, where did you buy the belt?
Check the condition of the belt tensioner; you may want to replace the tensioner and the idler pulley(s). Not sure how many idler pulleys your engine has. N52 (on my car) has 2 idler pullies.
I did check the pully was brand new the alternator had the same serial numbers as the original.. i got the belt from the same place i bought the alt from at BMWautoparts.com im thinking it was a defective belt because it didnt just break it was totally shreaded...
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