General Procedure

NOTE: For specifications refer to the appropriate engine mechanical article. For 2.0L GTDI, refer to the GENERAL SPECIFICATIONS , or for 3.5L Ti-VCT, refer to the GENERAL SPECIFICATIONS tables.

Measure the piston diameter 90 degrees from the piston pin at the point indicated.

Fig 1: Locating Point For Measuring Piston Diameter 90 Degrees From Piston Pin
Courtesy of FORD MOTOR CO.