ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
(2) Place a 1.0 in. (25 mm) thick metal plate over hot plug upper surface.
Do not apply pressure greater than specified. Damage to cylinder head
will result.
(3) Use an arbor press to exert a pressure of 9923 to 12,128 Ibs (4500 to 5500 kg) on metal plate. This will
drive hot plug into position.
(4) Using plastic hammer, lightly tap hot plug head to ensure it is firmly seated.
(5) Repeat steps (1) through (4) for other hot plugs.
(6) Hot plug surfaces must be perfectly flush with cylinder head lower face. Use a surface grinder to grind
off any hot plug surface protrusions.
(7) After grinding, ensure hot plug surfaces are completely free of protrusions. Ensure there are no hot plug
depressions.
(8) Tap each hot plug heed lightly to ensure they are firmly seated.
f.
Apply a coat of engine lubricating oil (MIL-L-2104) to inner face of seal (12) and using oil seal installer, install
oil seal (12) to valve guides.
g.
Apply a coat of engine lubricating oil (MIL-L-2104) to valve stems and install eight valves (10 and 11) in cylin-
der head.
h.
Install springs (8 and 9) with their fine pitched end (painted) facing down, sealing ring (7) and seat assembly
(6) on valve stem.
i.
Use spring compressor to compress springs and install two piece spring lock (5).
i.
Repeat steps h and i for remaining seven valves.
3-27.6. Installation.
a.
Place new head gasket (4, FIGURE 3-60) on engine block with word TOP facing up.
3-125
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