Piston, Engine

Piston Diameter
Using a micrometer, measure the piston diameter at right angles to the piston pin hole, and at the piston 30.3 mm (1.193 inch) from the piston head.
Piston diameter 88.439 to 88.449 mm (3.4819 to 3.4822 inch)

Piston Oil Clearance
Subtract the piston diameter measurement from the cylinder bore diameter measurement.
Standard oil clearance 0.051 to 0.074 mm (0.0020 to 0.0029 inch)
Maximum oil clearance 0.10 mm (0.0039 inch)





Ring Groove Clearance






Piston Ring End Gap
Using a piston, push the piston ring a little beyond the bottom of the ring travel, 110 mm (4.33 inch) from the top of the cylinder block.




Standard end gap




Maximum gap

Piston Pin Oil Clearance





Piston pin bore diameter 22.001 to 22.010 mm (0.8662 to 0.8665 inch)





Piston pin outer diameter 21.997 to 22.006 mm (0.8660 to 0.8664 inch)





Connecting rod small end bore diameter 22.005 to 22.014 mm (0.8663 to 0.8667 inch)





Subtract the piston pin outer diameter measurement from the piston pin bore diameter measurement.
Standard oil clearance 0.001 to 0.007 mm (0.00004 to 0.0003 inch)
Maximum oil clearance 0.013 mm (0.0005 inch)

Subtract the piston pin outer diameter measurement from the connecting rod small end bore diameter measurement.
Standard oil clearance 0.005 to 0.011 mm (0.0002 to 0.0004 inch)
Maximum oil clearance 0.017 mm (0.0007 inch)