Procedures

VALVES, GUIDES AND SPRINGS

Special Tools:











REMOVAL










1. Remove cylinder head Cylinder Head - Removal.
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.
3. Install the valve spring compressor base 8313A (1) as shown.










4. Install the valve spring compressor top plate, washer, and nut. Using a suitable wrench, tighten the nut (clockwise) to compress the valve springs and remove the locks.
5. Rotate the compressor nut counter-clockwise to relieve tension on the springs. Remove the spring compressor (1).










6. Remove the retainers (5), springs (4), valve seals (3) (if necessary), and valves (2). Arrange or number all components so they can be installed in their original locations.
7. Repeat the procedure on all cylinders to be serviced.

CLEANING

Clean the valve stems with crocus cloth or a Scotch-Brite(TM) pad. Remove carbon with a soft wire brush. Clean valves, springs, retainers, and valve retaining locks in a suitable solvent. Rinse in hot water and blow dry with compressed air.

INSPECTION





Visually inspect the valves for abnormal wear on the heads, stems, and tips. Replace any valve that is worn out or bent.









Measure the valve stem diameter in three places as shown.

VALVE GUIDE BORE SPECIFICATIONS









Measure the cylinder head valve guide bore.









Measure valve margin (rim thickness).









Measure the valve spring free length and maximum inclination.









Test valve spring force with tool (1). Specification 72.0 - 80.7 lbs. when compressed to 35.33 mm (1.39 in.).

INSTALLATION










1. Install new valve seals. The yellow seals are for the intake valves and the green seals are for the exhaust valves.
2. Install the valves in their original position. The exhaust valves are identified by a dimple on the valve head.










3. Install the valve (2), springs (4), and retainer (5).










4. Install the valve spring compressor tool base (1) as shown.










5. Install the valve spring compressor top plate, washer, and nut.
6. Compress the valve springs and install the valve retaining locks.
7. Remove the valve spring compressor tool and repeat the procedure on the remaining cylinders.
8. Install new o-ring and sealing washer on injector.
9. Lubricate o-ring and injector bore.
10. Verify sealing washer (shim) was removed with old injector.
11. Install injector Fuel Injector - Installation.
12. Install the cylinder head Cylinder Head - Installation.