PISTON PIN INSPECTION

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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.

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  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.

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  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.

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  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}