Piston, Pin, Connecting Rod

Removal





1. Apply engine oil to the piston pin snap rings, and turn them in the ring grooves until the end gaps are lined up with the cutouts in the piston pin bores.

NOTE: Take care not to damage the ring grooves.





2. Remove both snap rings. Start at the cutout in the piston pin bore.

NOTE: Remove the snap rings carefully so they do not go flying or get lost. Wear eye protection.





3. Heat the piston and connecting rod assembly to approximately 158°F (70°C), then remove the piston pin.

WARNING: Work carefully to prevent getting burned.

NOTE: Inspect the piston, piston pin and connecting rod when they are at the room temperature.

Inspection

NOTE: Inspect the piston, piston pin and connecting rod when they are at room temperature.





1. Measure the diameter of the piston pin.





2. Zero the dial indicator to the piston pin diameter.





3. Check the difference between the piston pin diameter and piston pin hole diameter on the piston.

NOTE: Check the piston for distortion or cracks.





4. Measure the piston pin-to-connecting rod clearance.

Installation





1. Install a piston pin snap ring.





2. Heat the piston to approximately 158°F (70°C).

WARNING: Work carefully to prevent getting burned.








3. Coat the piston pin bore in the piston, the bore in the connecting rod, and the piston pin with engine oil. Install the piston pin.

NOTE: Install the piston with its offset mark and the oil hole in the connecting rod on the same side.

4. Install the remaining snap ring.