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.

Measure the piston pin bore diameter in two directions on each side. Verify the diameter is within specification. Refer to SPECIFICATIONS .
- If out of specification, install new components as necessary. Refer to ENGINE article for the procedure.
  
  Fig 1: Measuring Piston Pin Bore Diameter In Two Directions
  Courtesy of FORD MOTOR CO.
  
  Fig 2: Identifying Piston Pin Bore
  Courtesy of FORD MOTOR CO.