The upper groove only needs to be inspected for dam-
age. Use a new piston ring (2) to measure the clear-
ance
in
the
intermediate
ring
groove.
Minimum
clearance is 0.045 mm (0.0018 inch), maximum clear-
ance 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.
Measure the pin bore (2). The maximum diameter is
40.012 mm (1.5753 inch), Minimum is 40.006 mm
(1.575 inch). If the bore is over limits, replace the pis-
ton (1).
Inspect the piston pin for nicks, gouges and excessive
wear. Measure the pin diameter (1). The minimum
diameter is 39.990 mm (1.5744 inch), maximum
40.003 mm (1.5749 inch). If the diameter is out of lim-
its, replace the pin (1).
9 - 2610
ENGINE - 5.9L DIESEL - SERVICE INFORMATION
DR/DH