Piston Installation Procedure
1. Properly orient the piston (1) on the connecting rod (2) as follows:
^ The locating mark (4) cast into the underside of the piston should point towards the front of the engine.
^ The locating notch (3) on the connecting rod cap should be pointing towards the rear of the engine on odd-numbered cylinders and towards the front of the engine on even-numbered cylinders.
2. Align the piston pin bore with the connecting rod pin bore.
3. Slide the piston pin (4) into the piston and the connecting rod (3).
4. Install new piston pin retainers (1) using the J 38637.
5. Repeat these procedures for the remaining pistons.