Disassembly And Assembly Of Subassemblies: Piston: Assembly

1. Align the piston-to-connecting rod orientation marks and position the connecting rod in the piston.
2. Lubricate the piston pin and pin bore with clean engine oil.
3. Install the piston pin in the piston and connecting rod assembly.
4. Install the piston pin retaining clips in the piston.
5. Lubricate the piston and the new piston rings with clean engine oil.
NOTE: The piston compression lower ring should be installed with the "O" mark on the ring face pointing up toward the top of the piston.
NOTE: When installing the piston oil control spacer, orient the gap such that the cut ends are pointed toward the top of the piston.
6. Install the piston rings onto the piston as shown in the figure below.
   1. Center line of the piston parallel to the wrist pin bore
   2. Upper compression ring gap location
   3. Upper oil control segment ring gap location
   4. Lower oil control segment ring gap location
   5. Expander ring and lower compression ring gap location

Fig 1: Exploded View Of Piston Ring Position

Courtesy of FORD MOTOR CO.