TM 5-4320-300-146-9. VALVES, CAMSHAFT, AND TIMING GEARS (CONT)Location/ItemActionRemarksINSTALLATION39. Valve faceApply a light coat of Prussian blue or similarThe most desirablecontact checkpaste to valve seat insert. Lower stem of re-area of contact isplacement valve in valve guide and bounce thethe center of thevalve on the seat. Do not rotate the valve.valve face.This procedure will show the area of valveface contact.40. Valve ad-If replacement valves do not show contactjustmentwith valve seat insert at center of valveface, the valve will have to be ground.41. Valve in-Lubricate valve stems with sulphurized oilstallation(E.P. type) and slide valves all the way into-the guides. Hold valves in place temporarilywith a strip of masking tape. Turn cylinderhead right side up on workbench. Place aboard under the head to support valves andto provide clearance between cam followersand bench.42. Valve guideLubricate valve stemoil sealand new oil seal withMIL-L-2104 oil andstart oil seal carefullyover valve stem. Driveseal down slowly oncylinder head.6-70
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