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Piston Selection

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

  1. 1.

    Select a piston size based on the cylinder bore.
GFD56510Courtesy of FORD MOTOR COMPANY

  1. 2.

    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 article for the procedure.
GFD56517Courtesy of FORD MOTOR COMPANY
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