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.

Fig 1: Identifying Piston Pin Retainer Ring

Courtesy of MAZDA MOTORS CORP.

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 it is out of specification, install new components as necessary.
  
  Fig 2: Measuring Piston Pin Bore Diameter
  Courtesy of MAZDA MOTORS CORP.