Ford Focus Service Manual: Piston Selection - Engine System

NOTE:

The cylinder bore must be within the specifications for taper and out-of-round before fitting a piston.

1. Select a piston size based on the cylinder bore.

1. 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 section in Group 303 for the procedure.