TM 9-2320-260-34-1
3-51. CYLINDER HEAD REPAIR (Contd)
a. Disassembly
WARNING
Valves under spring tension. Use care when removing from valves.
Failure to do so may cause injury to personnel.
NOTE
Tag springs for installation
1. Using valve spring compressor, remove sixteen half-keepers (1), eight upper spring guides (7), valve
springs (6), and lower spring guides (5) from valve guides (2). Discard half-keepers (1).
2. Remove eight valves (3) from cylinder head (4) and place on numbered valve board for inspection.
NOTE
Perform step 3 for number 3 head.
3. Remove two screw-assembled lockwashers (9), plate (10), and two O-rings (11) from fuel crossover
connection (12). Discard O-rings (11) and screw-assembled lockwashers (9).
4. Remove four pipe plugs (16) from cylinder head (4).
5. Remove four freeze plugs (14) from cylinder head (4). Discard freeze plugs (14).
6. Remove two freeze plugs (13) from front and rear face of cylinder head (4). Discard freeze plugs (13).
7. Remove two freeze plugs (8) from top of cylinder head (4). Discard freeze plugs (8).
8. Remove freeze plug (15) from front face of cylinder head (4). Discard freeze plug (15).
b. Cleaning
For general cleaning instructions, refer to TM 9-247.
1.
CAUTION
Do not use disc sander to polish cylinder heads. Serious damage to
gasket sealing surfaces may result.
2. Using brush, remove all gasket remains and carbon deposits from mating surfaces. Inspect cylinder
head (4) (para. 2-9).
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