Piston: Service and Repair

Piston





Special Tool(s)

Disassembly

1. NOTE:
^ The connecting rod bolts and nuts cannot be reused.
^ Mark the position of the parts, so they can be installed in their original position.

Remove the connecting rod bearings from the connecting rod and caps.
2. Remove the piston rings.





3. Using the special tool, press the piston pin out of the connecting rod and piston assembly.





4. Remove the connecting rod from the piston.
5. Clean and inspect the connecting rod and piston.

Assembly

1. NOTE: Apply a light coat of clean engine oil to all parts. Install the piston in the connecting rod with the cylinder number side of the rod and the indentation notch in the piston on the same side.

Install the large chamfered side of the connecting rod bearing bore facing toward the engine front on the RH bank connecting rod and facing toward the rear of the engine on LH bank connecting rod.

2. NOTE: The oil hole in connecting rod must face the RH side of the cylinder block and the arrow on the piston must face the front of the engine block.





Position the piston pin in the bore aligned with the connecting rod bore.

3. NOTE: If the piston pin is removed from the piston, a new piston and pin assembly must be used. Do not reuse the piston or piston pin.

Gradually heat the pin bore side of the connecting rod to approximately 232° C - 316° C (467° F - 626° F) and immediately install the piston pin.





4. Using the special tool, press the piston pin into the piston and connecting rod assembly.
5. Install the piston rings.