Piston Pins
NOTE:
The piston and pin are a matched set. Keep piston, pin, rings and rod together for each cylinder.
- Check fit between piston and pin by moving piston back and forth on piston pin. If any movement is felt, replace piston and pin.
- To remove, warm piston and rod assembly to about 70°F (20°C). Press out pin using Pin Remover/Installer (09221-25014) for 3A-C and (09221-25015) for 4A-C and 4A-LC. DO NOT damage piston during removal.
- Check pin and piston pin hole for signs of galling or excessive wear. Replace as necessary. To assemble, reheat piston to 70°F (20°C). Align the cavity on piston top with protrusion on rod.
- Coat pin with oil. Insert into piston using pin installer while holding parts in proper alignment. Check for no movement of piston on pin. See Fig 1. Press pin until centered in rod.
NOTE:
Align the piston cavity with connecting rod protrusion.