Piston Pin Inspection
PISTON PIN INSPECTIONCAUTION: If the piston or piston pin is replaced, replace the piston, piston pin and the snap ring as a single component.
1. 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 20.995-21.000 mm {0.82658-0.82677 in}
2. 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 21.004-21.008 mm {0.82693-0.82708 in}
3. 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}
4. Measure the inner diameter on the small end of the connecting rod using the caliper gauge in the X and Y directions as shown in the figure.
Standard connecting rod small end inner diameter 21.006-21.017 mm {0.82701-0.82744 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 0.006-0.022 mm {0.0003-0.0008 in}