Production standard 6.5L pistons are available in one grade size, identified by a J (naturally aspirated) or JT (turbocharged) ink or metal stamped on the top or bottom of the piston. Also available is a production oversize piston grade sizes for in-plant rework. Identified by an S (naturally aspirated) or ST (turbocharged) ink or metal stamped on the top or bottom of the piston.

1. Remove the piston rings.



2. Remove the connecting rod bearing inserts.
3. Using a scribe with a hooked, rounded end, pry out the piston pin retainers.
4. Remove the piston pin. The pin is a full-floating style and should slide from the piston. If the piston pin is to be reused, place it in a rack so that it may be reinstalled with the original connecting rod and cap.
5. Remove the piston from the connecting rod.