D 350 Pickup L6-359 5.9L DSL (1989)
Piston: Service and Repair
Cleaning and Inspection
Piston, Pin and Rod - Inspection
PISTON, PIN AND ROD - INSPECTION
Inspect the pistons for damage and excessive wear. Check the top, ring grooves, skirt and pin bore.
Measure the piston skirt diameter as illustrated.
Minimum Diameter: 101.823mm [4.0088 inch]
NOTE: Refer to the limits for the oversize pistons.
Use a new piston ring to measure the clearance in the ring groove.
Maximum Clearance - The upper groove only needs to be inspected for damage. Check the clearance as shown with a new ring and feeler gauge. If
the clearance of the intermediate ring exceeds 0.150mm [0.006 inch] replace the piston.
If the clearance in oil groove exceeds 0.130mm [0.005 inch], replace the piston.
