TM 5-3805-281-24-2
Cylinder Head and Valves
CLEAN VALVE GUIDES
Use a D17011BR Valve Guide Cleaning Brush to clean
valve guides before inspection or repair.
NOTE: A few drops of light oil or kerosene will help to
fully clean the guide.
Cleaning Valve Guides
RG,RG34710,1088
1923OCT971/1
MEASURE VALVE GUIDES
Measure valve guides (A) for wear using a telescope
gauge (B) and micrometer.
Valve Guide--Specification
ID ........................................................... 9.51--9.54 mm (0.3745--0.3755
in.) in new head
New Guide-to-Exhaust Valve Stem--Specification
Clearance .............................................. 0.051--0.102 mm (0.002--0.004
in.)
Measuring Valve Guides
New Guide-to-Intake Valve Stem--Specification
Clearance .............................................. 0.025--0.076 mm (0.001--0.003
in.)
IMPORTANT: ALWAYS knurl exhaust valve guides
before reaming to assure proper valve
guide-to-stem clearance.
NOTE: Worn guides can allow a clearance of 0.15 mm
(0.006 in.) and still be acceptable. Worn guides
may be knurled to return them to specified
clearance if valve-to-guide clearance is 0.25 mm
(0.010 in.) or less. If clearance exceeds 0.25 mm
(0.010 in.), install oversize valves.
RG,RG34710,1089
1923OCT971/1
