Rick's Free Auto Repair Advice

Posts Tagged: belt chirp

Belt noise — How to diagnose and fix

Serpentine belt noise squeal or chirp Belt noise can be caused by a tension, alignment or wear issue If you have belt noise that sounds like a squeal or chirp, you’ve got an underlying problem that must be fixed. The #1 cause of serpentine belt noise is a worn automatic serpentine belt tensioner. Most people blame the belt and replace it only to find the belt noise returns. You may think the belt tensioner is in good shape simply because it applies some tension to the belt—not true!. Automatic 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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