Valve: Service and Repair

REMOVAL
1. Remove cylinder head.
2. Support cylinder head on stands, or install head bolts upside down (through combustion surface side) to protect injector tips from damage from work bench.





Fig. 90

3. Remove the injector clamp (Fig. 90) from the cylinder(s) to be serviced. Do not remove the bolt shown in (Fig. 90).





Fig. 91

4. Install the valve spring compressor mounting base (special tool 8319) as shown in (Fig. 91). Reinstall the injector clamp bolt finger tight.





Fig. 92

5. Install the compressor top plate, washer, and nut. Using a suitable wrench, tighten the nut (clockwise) to compress the valve springs (Fig. 92) and remove the locks.
6. Rotate the compressor nut counter-clockwise to relieve tension on the springs. Remove the spring compressor.





Fig. 93

7. Remove the retainers, springs, valve seals (if necessary), and valves (Fig. 93). Arrange or number all components so they can be installed in their original locations.
8. Repeat the procedure on all cylinders to be serviced.

INSTALLATION
1. Install new valve seals. The yellow springs are for the intake valves and the green seals are for the exhaust valves.





Fig. 100

2. Install the valves in their original position. The exhaust valves are identified by a dimple on the valve head (Fig. 100).
3. Install the valve springs and retainer.
4. Install the valve spring compressor tool 8319 as shown in (Fig. 91) and (Fig. 92).
5. Compress the valve springs and install the valve retaining locks (Fig. 93).
6. Remove the compressor and repeat the procedure on the remaining cylinders.
7. Install the injector clamp and hold down bolts and tighten to 10 Nm (89 in. lbs.) torque.
8. Install the cylinder head.