Quote:
Originally Posted by juld0zer
A lot of folks (even experienced guys) downplay the importance of having clean pulleys. Fact is, belts wear down on the sides of their ribs mainly. As the ribs wear, they get thinner so the peaks of the ribs eventually can touch the valleys of the pulley ribs, depositing rubber. Slap on a new belt and since the pulleys are also slightly worn, the new belt's ribs sit lower and closer to the pulley's valleys, elevating the belt and causing the ribs to not make proper contact.
Leaky oil filter housings melt the rubber belt, which adds to this problem.
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Clean ensures proper functioning, anyone who ignores grime is asking for problems. Squeaky clean ensures no squeaking!