Piston Diameter

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Measure the piston diameter 90 degrees from the piston pin and 42 mm (1.65 in) down from the top of the piston at the point indicated.
- If out of specification, install new components as necessary. Refer to ENGINE for the procedure.
  
  Fig 1: Measuring Piston Diameter
  Courtesy of FORD MOTOR CO.