TM 5-3805-281-24-2
Cylinder Head and Valves
INSPECT AND MEASURE VALVES
1. Thoroughly clean and inspect valves to help determine
if they can be restored to a serviceable condition.
Replace valves that are burned, cracked, eroded, or
chipped.
2. Inspect valve retainer lock groove (C) on valve stem
for damage. Also inspect stems for signs of scuffing,
which may indicate insufficient valve guide-to-valve
stem clearance. Replace if defects are evident.
3. Measure valve head O.D. (A). Compare valve stem
O.D. (B) with guide I.D. to determine clearance, as
outlined later in this group.VALVE STEM OD
SPECIFICATIONS
Measuring Valves
Intake Valve Stem--Specification
OD ................................................................................. 7.864--7.884 mm
(0.3096--0.3104 in.)
Exhaust Valve Stem--Specification
OD ................................................................................. 7.848--7.874 mm
(0.3090--0.3100 in.)
RG,RG34710,1083
1923OCT971/2
4. Using D05058ST Valve Inspection Center to determine
if valves are out of round, bent or warped.
Valve Face--Specification
Runout ........................................................ 0.05 mm (0.002 in.) maximum
permissible
Valve Face Runout Check
RG,RG34710,1083
1923OCT972/2