TM 5-6115-400-35
in service
replacement
cylinder
use the tool, place cylinder head in
heads.
a press with head gasket surface
up. Assemble guide installing tool
by screwing pilot into stop plate.
Install adapter, exhaust or intake on
the pilot. Install valve guide on the
pilot with bottom end (end not
tapered) against the adapter. Insert
installing tool and guide into guide
bore in cylinder head and press
downward until stop plate rests on
head gasket surface of cylinder.
Note
To eliminate the possibility of
scuffing guide or bore in the cylinder
head, coat outside surface of guide
with a mixture of white lead and
lubricating oil before pressing guide
into position.
(c) After pressing valve guides into
position, check the distance from
top of guide to counterbore in
cylinder head. This dimension must
be .721 inch-.736 inch (47/64 inch)
on intake valve guide and 1.346
inch-1.361 inch (1 23/64 inch) on
exhaust valve guide (fig.
Figure 57. Installing exhaust valve guide.
(d) The bore of intake valve guides is
.373 inch-.3735 inch and exhaust
valve guides .3732 inch-.3742 inch.
The interference fit of guides in the
cylinder is .0005 inch -.002 inch.
The
guide
bore
will
close
approximately .001 inch when
installed with maximum interference
fit. To resize intake valve guides
after installation, use a .372 inch
valve guide reamer first and follow
with a .373 inch valve guide reamer
guide by first using a .373 inch
reamer followed by a .374 inch
reamer to complete the operation.
Note
Intake and exhaust valve guides
installed in production and service
replacement cylinder heads at the
factory
are
sized
with
a
"bearingizing" tool.
However,
Figure 58. Reaming intake valve guide.
service replacement valve guides are
not "bearingized" and must be
reamed after installation in cylinder
head. Do not ream guides installed
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