TM 10-4320-344-24
4.4.1 Cylinder Head Assembly, Intake Valve, and Exhaust Valve Maintenance, Model 609-A. (Continued)
If valve guides are to be replaced, they must be replaced prior to any
refinishing on the valve seats.
j .
Replace excessively worn or damaged valve guides (16).
Position valve guides
(16) so that distance between gasket surface of cylinder head (6) and bottom
of valve guide (16) is 1.3800 inches (35.0520 mm).
k.
After installing new valve guides (16) ream the inside diameter to correct any
squeezing or distortion.
Ream intake valve guides (16) to 0.3740 inches
(9.4496 mm) to 0.3750 (9.5250 mm).
Ream exhaust valve guides (16) to 0.3750
inches (9.5250 mm) to 0.3760 inches (9.5504 mm).
If valve seats are pitted or new valve guides were installed the valve seats
must be refinished.
l .
Grind valves (11 and 15) valve seats of cylinder head (6) sufficiently to
remove pits and burrs. Valve seat angles are 30° for intake valves and 45° for
exhaust valves.
m.
Make ten or twelve pencil marks, equally spaced,
head (6).
across valve seat in cylinder
n.
Insert valve (11 or 15) in valve seat of cylinder head (6), apply pressure
firmly, and rotate valve (11 or 15) in valve seat of cylinder head (6).
o .
Remove valve (11 or 15) from valve seat in
pencil marks.
If all pencil marks are not
n.
4.4.1.3 Assembly.
a .
b .
c .
d .
e.
Assemble valves in the same
ground must be assembled in
Lubricate stems of valves
cylinder head (6)
rubbed out repeat
and inspect
steps 1 through
seats to which they were ground.
Valves not
the same seats from which they were removed.
(11 and 15) with a few drops of oil and insert them
into the valve seats on cylinder head (6) to which they were ground or from
which they were removed.
Remove tags.
Using a valve spring compressor install valve springs (14), valve rotator
(13), and seat lock (12) on stems of exhaust valves (15).
Insert intake valve inserts (10) over ends of intake
exposed ends of valve guides (16).
Using valve spring compressor, install valve springs
seat (8) and seat lock (7).
Turn cylinder head (6) on the exhaust manifold side.
valves (11).
Secure on
(9), valve spring
4-6
