Piston Pin Inspection

PISTON PIN INSPECTION





1. Measure the piston pin hole diameter using the caliper gauge. Measurement positions total eight and are in the X and Y directions, at four points (A, B, C, and D) as shown in the figure.

Standard piston pin hole diameter
22.504-22.508 mm (0.8860-0.8861 in)





2. Measure the inner diameter on the small end of the connecting rod using the caliper gauge. Measurement positions total eight and are in the X and Y directions, at four points (A, B, C, and D) as shown in the figure.

Standard connecting rod small end inner diameter
22.510-22.521 mm (0.8863-0.8866 in)





3. Measure the piston pin outer diameter using the micrometer. Measurement positions total eight and are in the X and Y directions, at four points (A, B, C, and D) as shown in the figure.

Standard piston pin outer diameter
22.495-22.500 mm (0.8857-0.8858 in)

4. Calculate the clearance between the piston pin hole diameter and the piston pin outer diameter.
^ If it is not within the specification, replace the piston or the piston pin.

Standard clearance between piston pin hole diameter and piston pin outer diameter
0.004-0.013 mm (0.0002-0.0005 in)

5. Calculate the clearance between the inner diameter on the small end of the connecting rod and the piston pin outer diameter.
^ If it is not within the specification, replace the connecting rod or the piston pin.

Standard clearance between connecting rod small end inner diameter and piston pin outer diameter
0.010-0.026 mm (0.0004-0.0010 in)