Cylinder Head and Valves (cont).

TM 10-3930-638-24&P

4-2. ENGINE MAINTENANCE (cont)

b. Cylinder Head and Valves (cont).

STEP

LOCATION

ITEM

ACTION

REMARKS

REMOVAL

a. Valve spring (3)

Use valve spring compressor tool

Cylinder head

Compress

b. Two valve keepers (1)

(8), top

Remove and discard

Release

Carefully release pressure on valve

c. Valve spring (3)

spring compressor tool

d. Spring retainer (2)

Remove

e. Valve spring (3)

Remove

f. Spring seat (4)

Remove

g. Valve stem seal (5)

Remove

NOTE

Identify (number) valves (6 and 7) and respective bores for

reference during installation.

Cylinder head

a. Exhaust valve (6)

Remove

(8), bottom

b. Intake valve (7)

Remove

CLEANING

CAUTION

In following step be careful not to scratch valve stems.

Four exhaust valves (6)

Use fine power driven wire brush

Clean

and intake valves (7)

WARNING

Dry cleaning solvent (P-D-680), used to clean parts is toxic and

flammable. Wear protective goggles and gloves and use only in a

well ventilated area. Avoid contact with skin, eyes, and clothes

and don't breathe vapors. Do not use near open flame or exces-

sive heat and don't smoke when using it. Failure to do so could

cause serious injury. If you become dizzy while using cleaning

solvent, get fresh air immediately, and get medical attention. If

contact with skin or clothes is made, flush with large amounts of

water. If contact with eyes is made, wash eyes with water immedi-

ately, and obtain medical aid immediately.

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