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 TM 55-1905-221-14-2
5-15.
CYLINDER HEAD (Continued).
LOCATION/ITEM
ACTION
REMARKS
REPAIR/REPLACEMENT (Cont)l
j.
Drive the inserts (8) in
Use tool J6568.
place until they seat solidly
in the cylinder head.
k. Grind the valve seat inserts
and check them for concen-
tricity in relation to the
valve guides.
l.
Reface an exhaust valve which
If necessary.
is to be reused. The edge of
the valve at the valve head
must be not less than 1/32
Inch (0.079 cm) in thickness
after refacing.
m. Before installing either a new
or used valve, examine the
valve seat insert in cylinder
head for proper valve seating.
The proper angle for the seat-
ing face of both the valve
and valve insert is 30.
n. The angle of the valve seat
insert must be exactly the
same as the angle of the
valve face so as to provide
proper seating of the valve.
o. When a new valve seat insert
is installed or an old insert
is reconditioned, work must
be done with a grinding tool.
5-368
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