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Squeaking belts are the result of improperly adjusted tensioners and pulleys. The belt slides over the pulley and squeaks. Using a lubricant would defeat the purpose. Also I'm not sure what affect wd-40 would have on the material the belts are made of. To get them to stop squeaking tighten them up. Make sure you use your manual and don't get them too tight.

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14y ago

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Q: Can wd-40 be used on squeaky auto belts?
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