Procedure A

PROCEDURE A:
Snap Ring Installation and Valve Stem Seal Replacement (On the Vehicle)





1. Using the groove cutter (Special tool MD998790), make a groove in the exhaust valve guide (refer to Fig. 2 and 3).

a. Install the special tool on the exhaust valve guide.

b. Turn the tool clockwise until the force required to turn the tool suddenly decreases.

c. Remove the tool.

2. Using a magnet and shop towel, remove the cuttings from the cylinder head.





3. Install a snap ring in the groove cut in the exhaust valve guide (refer to Fig. 4).

4. Check the exhaust valve guide height with the .453" (11.5 mm) side of special tool MD998790 and a .040" (1 mm) feeler gauge. If the measurement is .413 (10.5 mm) or more (feeler gauge will not fit between special tool and top of valve guide) install the valve spring seat. Install all of the intake valve spring seats.

5. Install new valve stem seals on the intake and exhaust valve guides using special tool MD998729.

6. Reinstall the valve spring assemblies including the valve spring seats if not already installed step 4 of PROCEDURE A.

7. Return to step 4 of the PROCEDURE A and proceed to the next cylinder in sequence unless, all exhaust valve guide snap rings have been installed and all valve stem seals replaced on this head.

8. Reinstall the rocker shaft assembly, camshaft bearing caps, rocker cover and spark plugs. Return to step 8 of the REPAIR PROCEDURE unless this step completed the repair to both heads.

9. Using the procedures in the appropriate service manual, reassemble the engine.