E 250 3/4 Ton Van V8-5.4L CNG VIN M (1997)
Drive Belt: Initial Inspection and Diagnostic Overview
V-Ribbed Belt With Cracks (Acceptable)
V-Ribbed Belt With Chunks Of Rib Missing (Not Acceptable)
Under severe operating conditions (high temperatures, low humidity), drive belt rib cracking can occur at less than 48,000 km (30,000 miles). Drive belt
rib cracking has no effect on belt performance. Drive belt "chunking" describes a condition in which the rubber material actually chunks out between the
rib cracks. The drive belt must be replaced if chunking occurs.
