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 A - Retaining ring
9 - Intake and exhaust valve guide
B - Thrust washer
1 0 - l/8-in. pipe plug
c - Valve rocker arm assembly
1 1 - Core hole plug
1- Lock nut
1 2 - Exhaust valve seat
2- Rocker arm
1 3 - Exhaust valve
3- Rocker arm adjusting screw
1 4 - Intake valve
D - Core hole plug
1 5 - Intake valve seat
E - Rocker arm shaft
1 6 - Cylinder head
F - Rocker arm support
1 7 - 7/16 x 1-7/8 plain stud
G - 3/8 x 2- 1/2 cap screw
1 8 - 5/16 x 1- 1/2 plain stud
H - 3/8- in. lock washer
L - 9/16-in. plain cylider head nut
J - Thrust spring
M - 9/16 x 1/8 thk cylinder head nut spacer
K - Cylinder head assembly
N - Front engine lifting bracket
1 - Valve spring retainer lock
P - 7/16-in. ljock washer
2 - Valve spring retainer
Q - 7/16 x 7/8 cap screw
3 - Intake and exhaust valve inner spring
R - Cylinder head gasket
4 - Intake and exhaust valve outer spring
S - Valve tappet
5 - Valve rotator
T - Valve rocker arm push rod
6 - 5/16 x 3 plain stud
U - 9/16 x 3/8 thk cylinder head nut flat washer
7 - Coolant transfer tube
V - Locating pin
8 - Core hole plug
FIGURE 385. CYLINDER HEAD ASSEMBLY AND RELATED PARTS - EXPLODED
VIEW - CONTINUED.
the seat. Rotate the valve one- half turn
and check valve contact area. Identify
Note. The key letters shown below in paren-
valve seats that do not show perfect
these refer to figure 385 except where other-
contact for future repair. Replace valve
wise indicated.
seats that are damaged beyond repair
or when they are cracked or loose (par.
a. Cleaning. Clean front cylinder head as-
20 a (2)).
sembly (K), valve springs (K-3 and K-4), intake
(3) Valves. Check intake valve (K-14) and
valves (K- 14), exhaust valves (K- 13), and valve
exhaust valves (K-13) for evidence of
rotators (K- 5) as directed in paragraph 152 c.
pitting, imperfect seating, or warpage
Remove heavy carbon deposits with a scraper
on valve head. Heavy discoloration,
or a wire brush. Do not nick or scratch the
burning, erosion, or a heavy carbon de-
gasket and valve seat surfaces. Remove carbon
posit on valve face indicates a warped
from injector nozzle and holder seats.
valve. A light frosted appearance or
minor discoloration on valve face does
b. Inspection.
not indicate a warped or unserviceable
valve. Inspect valve stems and locking
(1) Valve guides. Inspect valve guides (K- 9)
grooves in stems for pitting, scoring,
for cracks, galling, erosion, and scuf-
cracks, or damaged tips. Check valves
fing. Check guides for secure fit in cyl-
against limits specified in repair and
inder head. Check valve guides against
rebuild standards (par. 294). Replace
limits specified in repair and rebuild
valves that are cracked, warped, or
standards (par. 294).
otherwise unserviceable.
(4) Valve springs. Inspect inner spring
(2) Valve seats. Check intake valve seats
K- 3 and outer spring (K- 4) for wear,
(K-15) and exhaust valve seats (K-12)
cracks, set, or other evidence of failure.
for secure fit and for burned or pitted
Check springs against limits specified
condition. Check valve contact on seat
in repair and rebuild standards (par.
by coating the face with Prussian blue
and placing a new valve in position on
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