TM 5-4320-302-14
5-21.
VALVES, VALVE GUIDES, AND VALVE SEATS (CONT)
Location/Item
Action
Remarks
INSPECTION OF
VALVE GUIDES
7.
Valve guide
Measure valve stem/valve guide clearance on
inlet and exhaust valves with micro feeler
gage. The inlet valve stem/valve guide
clearance limit is 0.0118 inch (0.3 mm). The
exhaust valve stem/guide clearance limit is
0.0197 inch (0.5 mm). If the clearance is
greater than the limit specified for either
inlet or exhaust valve guide or if any valve
guides are fractured, chipped, scored, or
show excessive wear, notify general support
for repair or replacement.
5-97
