Although the piston wrist pins are retained by C-clips, the manufacturer recommends the use of a special press or a special heater to remove and install the connecting rod. This procedure can be performed by a machine shop.
The pistons have a mark indicating the direction to the front of the engine and they must be installed into the engine in that manner. There is a notch on the top of the piston and the letter W cast on the piston and the connecting rod to identify the front of each.
- Note the location of the forward mark on the piston and mark the connecting rod in relation.
- Remove the C-clips from the piston.
- The manufacturer recommends the use of a piston pin press stand, or heating the pistons to 140-158°F (60-70°C), to remove the wrist pin.
- Insure that the wrist pin bushing in the connecting rod is usable, and lubricate it with assembly lube.
- Remove the wrist pin from the new piston and lubricate the pin bores on the piston.
- Align the forward marks on the piston and the connecting rod and install the wrist pin.
- The new C-clips will have a flat and a rounded side to them. Install both C-clips with the flat side facing out.
- Repeat all of the steps for each piston being replaced.