RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN 6 (1998)
Piston: Description and Operation
PISTON GRADING
When rebuilding an engine with the original cylinder block, crankshaft and pistons, make sure the pistons are installed in the original cylinder.
If replacing the piston(s), make sure the replacement piston(s) are the same grade as the original piston.
If a new cylinder block or crankshaft is used, the piston grading procedure MUST be performed to determine the proper piston grade for each
cylinder.