Ford F87Z-6148-AA Kit - Piston Ring

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If the gap is too small, it must be enlarged or the ring ends may come in contact with each other during engine operation, which can cause serious damage to the engine. The end gap can be increased by filing the ring ends very carefully with a fine file. Mount the file in a vise equipped with soft jaws, slip the ring over the file with the ends contacting the file face, and slowly move the ring to remove material from the ends. When performing this operation, file only from the outside in.

The number two (middle) ring is installed next, ensuring that the stamped mark faces up toward the top of the piston. Use a piston ring installation tool and make sure the identification mark is facing the top of the piston.