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Old 12-30-2012, 04:26 AM
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vintage42 vintage42 is offline
BMW CCA 1405
Location: Louisville, KY
Join Date: Jun 2007
Posts: 3,760
Mein Auto: 1997 BMW Z3 1.9 5MT
Originally Posted by ALM168 View Post
Standard wisdom says not to spray belt dressing on serpentine belts (check the warning on the can) might try spraying pain old water on the belt to see if this quiets it down.
I always use the dressing in a tube, put a dab on a finger tip, and rub a little of that here and there on the accessible sections of the belts. That's all it takes. I would not spray belt dressing because most of it gets all over the engine with very little getting on the undersides of the belts. I think water might momentarily quiet a belt. But if the belt is slipping, the lasting adhesion of dressing is needed rather than the temporary lubrication of water.

Dressing is a stop-gap measure to quiet noise from a loose or misaligned or worn belt. The condition causing the noise needs to be addressed sooner or later.

Last edited by vintage42; 12-30-2012 at 04:32 AM.
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