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 268. INSTALLATION OF CYLINDER HEAD
d. Install Front and Rear Rocker Arms.
TAPPETS,
ASSEMBLIES,
VALVE
Refer to figure 268 and reverse the sequence
ROCKER ARM PUSH RODS, AND
of instructions B and D to install the front
ROCKER ARMS
and rear rocker arm sets. Set intake and ex-
haust valve clearance as directed in para-
a. Install Cylinder Head Assemblies.
graph 269.
Note. Cover fuel injector nozzle and holder
Note. Back off valve adjusting screws as
openings in cylinder heads to prevent entrance
far as possible to prevent the rocker arm pad
of dirt and foreign objects.
from driving any valve down far enough to hit
a piston that may be on top center. Tighten the
(1) Refer to figure 272 and reverse the se-
3/8 x 2-1/2 cap screws evenly to seat valve
quence of instructions to position the
rocker supports properly in the cylinder head
front and rear cylinder head assemblies
and over dowel pins.
and cylinder head gaskets.
269. ADJUSTING VALVE CLEARANCE
(2) Refer to figure 271 and reverse the se-
quence of instructions to install cylinder
Note. The valve clearances must be set
head attaching parts.
when he valves are closed (tappets on base
circle of camshaft). Set intake valves at 0.015 -
(3) Torque tighten cylinder head attaching
inch (cold) and exhaust valves at 0.025-inch
nuts following instructions which ac-
(cold).
company figure 485. Tighten cylinder
head nuts in sequence, twice to 60
pound feet, 100 pound feet, and then to
130 pound feet for final torque tightness.
NUTS USING BOX WRENCH -8722929 AND
TORQUE WRENCH.
b. Install Valve Tappets. Refer to figure 270
to install the 12 valve tappets.
c. Install Rocker Arm Push Rods. Refer
to figure 269 to install the 12 rocker arm push
rods.
SETTING VALVE CLEARANCE.
309
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