Serpentine Belt Noise: Squealing & Chirping Diagnosis
Quick Answer: Most serpentine belt noise—whether a squeal on cold start or a chirp at idle—is caused by belt slip, improper tension, or a misaligned or failing pulley. The belt itself is often the messenger, not the culprit. Fixing the noise means identifying why the belt is slipping, not just replacing it. That Morning Squeal … Read more