Install Cylinder Head. - TM-10-3930-243-340092

ensure a good seal between the cylinder head and

(1) Check the cylinder liner flange height with

block. Therefore, it is vitally important that the

relationship to the cylinder block.

cylinder head be installed with the utmost care.

(2) Check to be sure the top of the pistons are

Install cylinder head bolts; then, beginning on the

clean and free of foreign material.

camshaft side of the head, take up the tension in the

(3) Check to see that each push rod is threaded

into its clevis until the end of the push rod projects

cam follower springs by tightening the bolts lightly.

through the clevis. This is important since serious

Finally tighten the bolts to 170-180 foot-pounds

engine d a m a g e w i l l b e p r e v e n t e d w h e n the

torque with a torque wrench about one-half turn at

crankshaft is rotated during tune-up.

a time, in the sequence shown in figure 3-41.

(4) To avoid damage to the water and oil seals,

(4) If the injectors were not previously in-

check to be sure that the groove and the coun-

stalled, refer to paragraph 3-14 and install injectors

terbores in the top of the cylinder block are clean

at this time.

and smooth.

(5) Set injector control tube assembly in place

on cylinder head and tighten hold-down bolts,

g. Install Cylinder Head.

finger tight only. When positioning injector control

(1) Install new cylinder head compression

gaskets and seals as outlined below:

tube be sure that ball end of injector control rack

levers engage the slots in the injector control racks.

(a) Install a new compression gasket on each

cylinder liner.

With one end of the control tube return spring

hooked around one injector rack control lever and

(b) Place new seal rings in the counterbores

of the water and oil holes in the cylinder block.

the other end hooked around the control bracket,

tighten bracket bolts with a 7/16 inch universal

(c) Install a new oil seal in the milled groove

near the outer edge of the area covered by the

socket wrench to 10-12 foot-pounds torque. After

cylinder head.

tightening bolts, revolve tube and see if the return

spring pulls the injector racks OUT (NO-FUEL

NOTE

POSITION) after they have been moved all the

Water seals, oil seals, and compression gaskets should

way IN (FULL FUEL POSITION). Since the

never be reused.

injector control tube is mounted in self-aligning

(2) To install the cylinder head without

bearings, tapping the tube lightly with a soft

disturbing the gaskets and seals, special guide studs

hammer will remove any bend that exists. The

must be used. Install the cylinder head guide studs,

injector rack must return to the no fuel position

in the end cylinder block bolt boles. Wipe the

freely by aid of the return spring only. Do not bend

bottom of the cylinder head clean; then, lower the

the return spring to bring about this condition.

head on the block.

(6) Install fuel rod (fig. 3-38).

(3) The cylinder head must be gradually and

(7)

Install

exhaust

manifold,

thermostat

uniformly drawn down on the gaskets and seals to

h o u s i n g and thermostat (TM 10-3930-243-12).

3-54