New Belt Still Chirps? Translate the Sound into Tension, Alignment, and Pulley Checks
Translate a new belt chirp into repeatable checks for contamination, pulley alignment, tension, span vibration and accessory condition.
Tag pulley alignment
Serpentine Belt Chirp vs. Squeal: Diagnose the Drive System
Use rhythm, load, visual tracking, and engine-off inspection to separate alignment, tension, contamination, pulley, and accessory faults without masking the noise.