Figure 6-7.2. Valve Clearance Adjustment.

TM 10-3930-633-34

(9) Remove the coil bracket attaching bolt and

will cause a noisy lifter(s). If it has been determined

position the coil out of the way,

that these conditions are caused by improper valve

(10) Remove the valve rocker arm cover.

clearance, readjust the affected valve(s).

Loosen the rocker arm stud nuts so that the rocker

arms can be rotated to one side.

(11) Remove the valve push rods in sequence

and identify them so that they can be installed in their

original position.

(12) Disconnect the spark plug wires at the spark

plugs.

(13) Remove the cylinder head bolts. Install the

cylinder head lifting eyes in the locations shown in fig-

ure 6-7.3. Position a floor crane and attach the hoist

and lifting sling to the lifting eyes. Lift the cylinder

head and intake and exhaust manifolds assembly off

the engine. DO NOT PRY BETWEEN THE HEAD

AND BLOCK AS THE GASKET SURFACES MAY

BECOME DAMAGED.

Figure 6-7.2. Valve Clearance Adjustment.

6-14. Removal and Disassembly

If inspection or troubleshooting reveal cracked

cylinder head or defective gaskets, remove and

replace the cylinder head as follows:

a. Removal.

(1) Drain the cooling system.

(2) Remove the air cleaner ductwork.

(3) Remove the crankcase ventilation regulator

Figure 6-7.3. Cylinder Head Bolts Torque Sequence.

valve from the rocker arm cover. Disconnect the vent

hose at the intake manifold inlet tube,

b. Disassembly.

(4) Disconnect and remove the carburetor fuel

(1) Refer to TM 10-3930-633-12 and remove

inlet line and the distributor vacuum line.

the coolant outlet housing and thermostat, and the in-

(5) Disconnect the choke cable at the carbure-

take and exhaust manifolds and carburetor as an

tor and position the choke cable and housing out of

assembly.

the way.

(2) Remove the spark plugs.

(6) Remove the accelerator cable retracting

(3) Remove the deposits from the combustion

spring. Disconnect the accelerator cable from the car-

chambers and valve heads with a scraper and a wire

buretor.

brush before removing the valves. Be careful not to

scratch the cylinder head gasket surface,

(7) Disconnect the radiator upper hose at the

coolant outlet elbow.

(4) Compress the valve springs (fig. 6-8) then

remove the valve spring retainer locks and release the

(8) Disconnect the exhaust pipe from the ex-

spring.

haust manifold. Discard the inlet pipe gasket.

6-13.0

Change 1