ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
NOTE
If valve with an oversize stem is to be used, an oversize valve seat insert must be installed.
(1)
Use pilot driver (JDG-676) and valve seat insert installing adapter (JDG-675) to install valve seat inserts
(10 and 11) in cylinder head (2).
(2)
Use one end of adapter (JDG-675) to install intake valve seat inserts and the other end to install exhaust
valve seat inserts.
(3)
Install valve and check valve recess, refer to paragraph 3-34.2.
(4)
Grind valve seats as required to maintain correct valve recess and valve-to-valve seat seal, refer to
paragraph 3-34.4. step m.
b.
Apply clean engine lubricating oil (MIL-L-2104) to valve stems (7 and 8) and guides.
NOTE
Valves must move freely in guide bore and seat properly in head to form an effective seal.
c.
Insert valves (7 and 8) in head (if valves are reused, insert in same guide bore from which removed).
d.
Use soft rubber mallet to install slide valve stem seals (9) over valve stems and onto valve guide tower.
e.
Position valve springs (6) in machined counterbore of head.
f.
Install valve rotators (5).
g.
Compress valve springs (6) using valve spring compressor and install valve spring locks (4) on valves.
h.
After installing valves, strike end of each valve three or four times with a soft rubber mallet to ensure proper
positioning of valve spring locks (4).
3-154
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