Piston Pin: Testing and Inspection

1. Inspect the piston pin for the following conditions:
^ Scoring
^ Galling caused by improper installation
^ Fit in the connecting rod and piston
2. Measure the piston pin bore diameter with an inside micrometer.
3. Measure the piston pin diameter with a micrometer.
4. Subtract the piston pin bore diameter from the piston pin diameter in order to determine the clearance.
5. Compare the clearance with specifications in order to determine if clearance is in an acceptable range. Replace the piston assembly if it is not acceptable.