CYLINDER BLOCK/CRANKCASE
Page 4B-18 90-857046R1 NOVEMBER 2001
Piston
1. Inspect piston wall wear/damage. Replace if necessary.
2. Measure the piston at a point 0.2 in (5.0 mm) from the bottom. Replace if out of specifica-
tion.
a
b
a-Piston Diameter
b-0.2 in. (5.0 mm)
Piston Diameter “a”
Piston Size Diameter
Standard 2.5570 - 2.5578 in. (64.950 - 64.965 mm)
Oversize-0.010 in. (0.25 mm) 2.5669 - 2.5675 in. (65.2 - 65.215 mm)
Oversize -0.020 in. (0.50 mm) 2.5768 - 2.5774 in. (65.450 - 65.465 mm)
3. Measure piston to cylinder clearance. If out of specification examine piston and cylinder
bore further to determine repair/replacement.
a. Piston to Cylinder Clearance can be defined by:
MBM–MPM=PCC where:
MBM=Minimum Bore Measurement
MPM=Maximum Piston Measurement
PCC=Piston to Cylinder Clearance
Piston to Cylinder Clearance
0.0014 - 0.0026 in. (0.035 - 0.065 mm)
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