Visual Diagnosis

Fig 1: Belt Wear Patterns

Courtesy of CHRYSLER LLC

When diagnosing serpentine accessory drive belts, small cracks (1) that run across the ribbed surface of the belt from rib to rib, are considered normal. These are not a reason to replace the belt. However, cracks (2) running along a rib (not across) are not  normal. Any belt with cracks running along a rib must be replaced. Also replace the belt if it has excessive wear, frayed cords, severe glazing or chunking.

Any belt with bumps, surface coming apart, or any other uneven indications along the flat surface of the belt must be remove and inspected and replaced if necessary.

Refer to ACCESSORY DRIVE BELT DIAGNOSIS CHART  for further belt diagnosis.