Piston Pin - Installation Tool Instructions
NO.: TSB-96-11-009DATE: September, 1996
MODEL: All except 4D55, 420A & 6G74
SUBJECT:
PISTON PIN INSTALLATION TOOL INSTRUCTIONS
PURPOSE
This bulletin updates the MIT216941 OTC Piston Pin Service Set operating instructions to include models through 1996. This bulletin contains an illustration and parts list for the Piston Pin Service Set. It is suggested that a copy of these operating instructions be stored with the Piston Pin Service Set for ready reference.
AFFECTED MODELS
The Piston Pin Service Set is used for all engines except the Chrysler built 420A 2.0L DOHC non turbo engine used in Eclipse vehicles, the 6G74 3.5L V-6 engine used in Montero, and the 4D55 diesel truck engine. (Piston pins in these engines are not pressed into place and do not require use of the Piston Pin Service Set.)
PISTON PIN REMOVAL PROCEDURE
1. Remove the stop screw from the base.
2. Refer to the application table to select the correct piston support for your application. Fit the piston support onto the base. Place the base onto press support blocks.
3. Select a connecting rod guide pin from the application table. Insert the press pin through the piston pin hole. Thread the guide pin onto the threaded portion of the press pin as far as it will go.
4. Position the piston assembly on the piston support in the press. With the press pin up, insert the guide pin through the hole in the piston and through the hole in the piston support.
5. Press out the piston pin.
NOTE: Make sure the piston support seats squarely against the piston and that the piston pin will slide through the hole in the piston support.
6. Remove the piston pin from the press pin.
PISTON PIN INSTALLATION PROCEDURE
1. Thread the stop screw and lock nut assembly into the base. Fit the correct piston support on top of the base. Insert the press pin, threaded end up, into the hole in the piston support: until its end touches the stop screw.
2. Using the markings on the press pin, adjust the stop screw to the correct depth according to the application table.
NOTE: The piston pin depth set location is measured on the piston support as shown. If a curved support is being used, measure to the bottom center of the curve. For a flat support, measure to the lowest point of the flat surface.
3. Place the base onto press support blocks.
4. Slide the piston pin over the threaded end of the press pin, and thread the correct guide pin up against it.
5. Coat the piston pin with oil, and with the connecting rod held in position, slide the guide pin through the piston and connecting rod.
6. Press the piston pin through the connecting rod until the guide pin contacts the stop screw.
CAUTION: Due to production tolerance variations, it is necessary to visually inspect the piston pin depth after installation to verify that the piston pin is centered. Adjust if necessary.
7. Check that the piston moves smoothly. If not, press out the piston pin, determine the cause, correct it, and repeat the piston pin installation procedure.