Rick's Free Auto Repair Advice

Posts Tagged: belt squeal

Serpentine Belt noise

Serpentine belt noise squeal or chirp Belt squeal and belt chirp are caused by three things Three common causes of belt squeal and belt chirp 1) Improper tension due to a worn automatic tensioner or misadjustment of a manual tensioner 2) The belt is worn or an idler or rotating component is binding 3)  Driven component(s) are out of alignment Belt dressing and lubricating sprays will never fix a belt noise, squeal or chirp NOTE: Never spray a drive belt with belt dressing, WD-40 or any lubricant to quiet belt … Read More

Diagnose a belt tensioner

Diagnose a belt tensioner A worn automatic serpentine belt tensioner can cause belt squeal, misalignment, belt chirp, and alternator bearing damage. Automatic tensioners tend to wear out at around 100K miles. If you have a belt noise or vibration and you’ve changed the belt, it’s time to test your belt tensioner. It’s easy. Just follow the procedures below. First, understand the belt tensioner’s TWO jobs Belt tensioner job #1: Maintain proper belt tension The belt tensioner’s first job is to maintain the proper tension on the serpentine belt. That’s easy … Read More

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