Figure 7-23. Adjusting exhaust valve clearance

Note. The valve timing procedure must be

followed in detail to prevent the valves from

striking the head of the piston.

1. Rotate the right camshaft (A) until the two lobes (cams)

for intake and exhaust valves for No. 6R cylinder are

pointed towards the crankshaft. Remove cover from

fuel injector nozzle holder assembly opening in cylinder.

2. Apply a light film of sealing compound (MIL-C-10523

The exhaust valve clearance is

Note.

Ord.) on valve rocker arm cover and position cover (B)

decreased by turning the adjusting screw clock-

on cylinder. Identifying numbers on cover and cylinder

wise or increased by turning the screw coun-

must correspond (fig. 5-105). Valve rocker arm rollers

terclockwise. T o r q u e t i g h t e n a d j u s t i n g s c r e w

m u s t contact base circle of camshaft and lip of

preformed intercylinder hoses must not be folded under

lock

nut

175

pound-inches

after

adjustment.

cover. Tap cover gently to position cover over dowel

Figure 7-23. Adjusting exhaust valve

pins.

clearance.

3. Refer to figure 5-109 and torque tighten four bolts (C) to

pound-inches. Refer to figure 5-108 and

275 to

torque tighten all bolts and cap screws to 100 pound-

inches.

4. Refer to figure 5-107 and secure camshaft gear housing

to valve rocker arm cover and cylinder with bolts (D).

5. Using thickness gage blade-5210-793-7897 (E) set

intake valve clearance to 0.100-inch by turning the

adjusting screw clockwise to decrease the clearance or

counterclockwise to increase the clearance.

Note. Check position of valve adjusting screw

pad. Pad must seat flat on valve stem.

Figure 7-22. Installing valve rocker arm

cover and adjusting intake valve

clearance (cylinder No. 6R).

7-18