Piston Selection

For information on Ford Color Coded Illustrations refer to OEM COLOR CODING INFORMATION

Check 

1. Refer to specifications for piston selection. Refer to: 2.7L EcoBoost Specifications . Refer to: 3.3L Duratec-V6 Specifications . Refer to: 3.5L V6 PowerBoost (CN) Specifications . Refer to: 3.5L V6 PowerBoost (CN) Specifications . Refer to: 3.0L Power Stroke Diesel Specifications .
2. NOTE: The cylinder bore must be within the specifications for taper and out-of-round before fitting a piston.
   • Measure the cylinder bore in 2 directions.
   • Select a piston size based on the cylinder bore.

Courtesy of FORD MOTOR COMPANY