User Manual

42 SENR9977
Testing and Adjusting Section
5. Move the valve in a radial direction toward the dial
indicator as fa
r as possible. Note the distance of
movement which is indicated on the dial indicator.
If the distance is greater than the maximum
clearance of t
he valve in the valve guide, replace
the valve guide.
When new valv
e guides are installed, new valves
and new valve seat inserts must be installed.
Valve guides and valve seat inserts are supplied
as an unfinis
hed part. The unfinished valve guides
and unfinished valve seat inserts are installed in
the cylinder head. Then, the valve guides and
valve inser
ts are cut and reamed in one operation
with special tooling.
Refer to Spe
cifications, “Cylinder Head Valves” for
the maximum clearance of the valve in the valve
guide.