TM 5-4320-302-146-9. VALVES, VALVE GUIDES, AND VALVE SEATS (CONT)Location/ItemAction Remarks17. Valve seata. Inspect for nicks, burrs, or other minor dam-insert ringsage to valve mating surfaces of installed valveseat insert rings. Very carefully smooth outany nicks, burrs, or other minor damage withvalve seat ring cutter No. 122302 usingholder No. 122304.b. Check valve head/cylinder head seat clearancewith NEW valve in accordance with procedurein step 4.Maximum clearance is 0.2323 inch (5.9 mm).Minimum clearance is 0.2047 inch (5.2 mm).If maximum clearance is exceeded, replace valveseat insert rings again. Follow procedure as de-scribed in step 11. If clearance is below minimum,remachine valve seat insert rings with valve seatring cutter No. 122302 and holder No. 122304.Reconfirm that clearance falls within limitsafter remachining.NOTEIf remachining will cause either limit to be exceeded, replace valveseat insert rings or valves, respectively.6-59
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