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Old 12-29-2012, 11:47 AM
ALM168 ALM168 is offline
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Location: NJ
 
Join Date: May 2012
Posts: 99
Mein Auto: Z3, e46, Ford Explorer
Standard wisdom says not to spray belt dressing on serpentine belts (check the warning on the can). You might try spraying pain old water on the belt to see if this quiets it down. If it does, then you need to replace your belt(s). I had some temporary relief on a squeaking belt on a non-BMW car by putting some Comet cleaner on the belt. It removed the glaze from the belt...but in end, the belt needed to be changed.
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