Envoy 2WD V6-4.3L VIN W (1998)
Brake Drum: Service and Repair
Brake Drum Refinishing (Cracked, Scored, or Grooved)
A cracked drum is unsafe for further service. Replace cracked drums. Do not weld a cracked drum.
Smooth any light scores. Heavy scoring causes excessive lining wear. You may have to resurface the drum braking surface.
Polish the drum with fine emery cloth if the linings are only slightly worn. Eliminating all grooves in the drum removes too much metal and lining. Left
untouched, the grooves and ridges match. Satisfactory service can be obtained. Always refinish a grooved drum when replacing the brake linings. Using
a grooved drum with new linings will wear the linings. This may cause improper brake performance.
