Piston and Piston Pin

Special Tools:

Disassembly

1. NOTE: Mark the pistons to make sure of assembly with same connecting rod and installation in the same cylinders from which they were removed.

Remove pistons and connecting rods.
2. Remove piston rings from pistons.

3. WARNING: COVER THE END OF THE PIN BORE WITH A HAND OR SHOP RAG WHEN REMOVING THE RETAINER RING SINCE IT HAS A TENDENCY TO SPRING OUT. EYE PROTECTION SHOULD BE WORN.

NOTE: Piston pins are a slip fit to the pistons and may fall out once retainer rings are removed.





Using O-Ring Tool 100-010(T71P-19703-C), remove the two piston pin retainer rings.





4. Gradually heat pistons to approximately 700-800°C (184-201°F) to aid in removal of piston pins.

5. Remove piston pin from piston and connecting rod.

Assembly
1. Clean and inspect pistons.
2. Clean and inspect connecting rod.
3. Verify that all parts to be assembled are for same cylinder.

4. NOTE: When installing piston pin, check each end of piston pin for identification mark. If identification mark is present, install piston pin with identification mark toward front mark on piston.

NOTE: Align front mark on connecting rods with front mark on pistons.

Install new piston pin retainer ring into one side of piston pin bore.





5. Gradually heat pistons to approximately 70-80°C (184-201°F) to aid in assembly.
6. Lubricate piston pins with Super Premium SAE 5W30 Motor Oil XO-5W30-QSP or equivalent meeting Ford specification WSS-M2C153-G.

7. NOTE: Piston pins are a slip fit to the pistons.

Fig. 16 Piston & Rod Assembly:

Install piston pin through piston until piston pin bottoms on piston retainer ring.
8. Install a new piston pin retainer ring on other side of the piston bore.
9. After assembly, make sure connecting rod swings smoothly.
10. Install piston rings.
11. Install pistons and connecting rods.