RAM 2500 Truck 2WD V8-5.9L VIN Z (1997)
Brake Caliper: Testing and Inspection
The piston is made from a phenolic resin (plastic material) and should be smooth and clean. Replace the piston if cracked or scored. Do not attempt to
restore a scored piston surface by sanding or polishing. The piston must be replaced if damaged.
CAUTION: If the caliper piston must be replaced, install the same type of piston in the caliper. Never interchange phenolic resin and steel caliper
pistons. The pistons, seals, seal grooves, caliper bore and piston tolerances are different for resin and steel pistons. Do not intermix these components at
any time.
NOTE: The caliper should be replaced if the bore is severely corroded, rusted, or scored.