ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
5.4.11. CYLINDER HEAD.
The following procedures require complete access to the engine. If
necessary, remove engine from generator set, refer to TM 9-6115-671-14.
Mount engine on repair stand (NSN 4910-01-016-1835 or equal) as outlined
in paragraph 4.10.
Remove cylinder head, refer to paragraph 4.7.4.a.
Block cylinder head with a solid block of wood at each end of cylinder head
while using spring compressor. Failure to comply could result in serious
Do not stand in front of valve spring while compressing valve springs.
Failure to comply could result in serious personal injury.
Identify all parts for correct assembly. Use a valve board or other suitable
means of keeping valves in order.
Using valve spring compressor, compress valve spring (4, Figure 4-52) and remove valve spring
Release valve spring (4) tension and remove valve rotator (3) and valve spring (4).
Remove valve (10, 11) from cylinder head.
Remove valve stem seal (13) from valve guide tower.
The following procedure is provided for repairing the cylinder head.
Remove cylinder head (refer to paragraph 4.7.4. step a.) and place on a
Inspect valve springs as follows:
Inspect valve springs for alignment, wear, and damage. Replace all defective valve