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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 1: Identifying Piston Pin
    G02156251Courtesy of FORD MOTOR CO.
    Fig 2: Measuring Piston Pin Bore
    G02156252Courtesy of FORD MOTOR CO.
  1. 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.