TM 5-3810-300-24&P-3
EXHAUST VALVES 1.2.2
VALVE GUIDE INSTALLER CHART
Distance Of
Tool
Cylinder
Valve
Guide
No
Head
Guide
Above Top
Of Head
J 9729
4 Valve
450 Chamfer
.880"
J 21520
4 Valve
Machined
.690"
2.
Position the valve guide squarely in the bore in the
cylinder head and press the installing tool gently to
start the guide in place (Fig. 8). Then, press the
guide in until the tool contacts the cylinder head.
CAUTION: Do not use the valve guides as a means
of turning the cylinder head over or in handling the
cylinder head.
Service replacement valve guides are completely finish
Fig. 8 - Installing Valve Guide
reamed during manufacture and, therefore, do not
require reaming after installation.
change, current cylinder heads incorporate reamed valve
bridge guide holes in place of the 7/16"-14 tapped holes.
Inspect Exhaust Valve Bridge and Guide
To permit the use of spring-loaded valve bridges on a
replacement cylinder head which incorporates the press-
Inspect the valve bridge guide, valve bridge, and
fit guides, separate valve bridge spring seats were used.
adjusting screw for wear. Replace excessively worn
parts.
The press-fit valve bridge guide is hardened steel while
the valve bridge is relatively soft steel. The former
Former engines were equipped with spring-loaded
threaded valve bridge guide was soft steel
exhaust valve bridges. The valve bridge guides were
threaded into the cylinder head and incorporated integral
spring seats (Fig. 9). The threaded valve bridge guides
were replaced by press-fit guides. To conform with this
Fig.9 -- Exhaust Valve Bridge and Guide
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