Piston and Piston Pin
PISTON AND PISTON PINCrankshaft and Piston:
1. Check the pistons and piston pins for damage, cracks and wear, and the piston ring grooves for wear and damage. Replace if faulty.
2. Measure the piston-to-cylinder clearance at each cylinder. If any of the clearances is not within the standard value, replace the piston and bore the cylinder to enable use of an oversized piston.
3. Make sure that the piston pin can be inserted into the piston pin hole with a thumb at 20°C (68°F). Replace if faulty.
4. Check the snap ring installation groove (A) on the piston for burr. If necessary, remove burr from the groove so that the piston pin can lightly move.
5. Check the piston pin snap ring for distortion, cracks and wear.