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 TM 55-1905-221-14-2
5-15.
CYLINDER HEAD (Continued).
LOCATION/ITEM
ACTION
REMARKS
REPAIR/REPLACEMENT (Cont)
Wear protective eye goggles when using compressed air.
NOTE
Service replacement valve guides are completely finis h-reamed during
manufacture and, therefore, do not require reaming after installation.
Great care must be used during the installation of a valve seat insert
since this part has a press-fit in the cylinder head.
e.
Wash the cylinder head (29)
with fuel oil and dry it with
compressed air.
f.
Clean the valve insert
counterbore in the cylinder
head with trichloroethylene
or other good solvent. Wash
the valve inserts with the
same solvent. Dry both the
counterbores and the inserts
with compressed air.
g.
Inspect the valve seat insert
counterbores in the cylinder
head for cleanliness. The
counterbores in the cylinder
heads have a diameter of 1.626
inch (4.130 cm) to 1.627 inch
(4.133 cm) and a depth of
.3705 inch (0.9411 cm) to
.3845 inch (0.9766 cm). If
required, use valve seat
inserts which are .010 inch
(0.025 cm) oversize on the
outside diameter.
5-366
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