Piston Selection

WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

3.5L, 3.7L and 5.0L (4V) Engines

Engines are equipped with a single grade size piston.
6.2L (2V) Engines

NOTE: The cylinder bore must be within the specifications for taper and out-of-round before fitting a piston.
Select a piston size based on the cylinder bore.

Fig 1: Identifying Cylinder Bore Taper At Top
Courtesy of FORD MOTOR CO.
NOTE: For precision fit, new pistons are divided into 3 categories within each size range based on their relative position within the range. A paint spot or specific size grade on a new piston indicates the position within the size range.

Choose the piston with the correct paint color or specific size grade.
- Refer to the appropriate Engine information for the procedure.
  
  Fig 2: Locating Paint Spot On Piston
  Courtesy of FORD MOTOR CO.