Can You Spray WD-40 On A Squeaky Engine Belt? – SlashGear

A sound familiar to most drivers is the high-pitched squeal that comes from the belt-driven accessories mounted on the front of a majority of engines. This can happen when the belt is too loose or too tight, when the pulleys for the various accessories and tensioners are misaligned, or the bearings or clutches in those components have reached the end of their useful life.  Although people have utilized WD-40 for some wild off-label purposes, among its main stated uses

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