Piston - Pin to Bore Diameter

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

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

Courtesy of FORD MOTOR CO.

Fig 2: Measuring Piston Pin Bore Diameter

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.