RAM 3500 HD Truck 4WD L6-6.7L DSL Turbo VIN A (2007)
Piston: Procedures
Piston and Connecting Rod - Cleaning
CLEANING
CAUTION: DO NOT use bead blast to clean the pistons. DO NOT clean the pistons and rods in an acid tank.
PISTON
Clean the pistons and pins in a suitable solvent, rinse in hot water and blow dry with compressed air. Soaking the pistons over night will loosen most of
the carbon build up. De-carbon the ring grooves with a broken piston ring and again clean the pistons in solvent. Rinse in hot water and blow dry with
compressed air.
CONNECTING ROD
Clean the connecting rods in a suitable solvent, rinse in hot water and blow dry with compressed air.
Piston and Connecting Rod - Inspection
PISTONS
Inspect the pistons for damage and excessive wear. Check top of the piston, ring grooves, skirt and pin bore. Measure the piston skirt diameter. If the
piston is out of limits, replace the piston.
The upper groove only needs to be inspected for damage. Use a new piston ring (2) to measure the clearance in the intermediate ring groove. Minimum
clearance is 0.045 mm (0.0018 inch), maximum clearance is 0.095 mm (.0037 inch). If the clearance of the intermediate ring exceeds specifications,
replace the piston (3).
Use a new oil ring to measure the clearance in the oil groove. Minimum clearance is 0.040 mm (0.0016 inch), maximum clearance is 0.085 mm (.0033
inch). If the clearance exceeds specifications, replace the piston.
