Piston - Pin To Bore Diameter

WARNING: Cover the end of the pin bore with a hand or shop rag when removing the retainer ring, since it has a tendency to spring out. Wear eye protection.

NOTE: Piston and piston pins are a matched set and should not be interchanged.

Fig 2: Measuring Piston Pin Bore Diameter In Two Direction

Courtesy of FORD MOTOR CO.

Measure the piston pin bore diameter in two directions on each side. Verify the diameter is within specification.
- If out of specification, install new components as necessary. Refer to the appropriate ENGINE article for the procedure.
  
  Fig 1: Locating Piston Pin Bore
  Courtesy of FORD MOTOR CO.