TM  10-3930-643-34 ENGINE,  FUEL,  EXHAUST  AND  COOLING 4-4. Cylinder  Head  Assembly  with TROUBLESHOOTING  AND  MAINTENANCE.  (cont) Valves. (Sheet 10 of 18) DISASSEMBLY/CLEANING/INSPECTION    (cont) 32. Recheck valve face contact with Prussian blue if valve seats are resurfaced. 33. Place valves in proper guides and position  dial  indicator  against  stem. Raise  valve  approximately  0.5  inches. Move valve against and away from dial indicator  parallel  to  cylinder head (6). NOTE If total indicator reading is more than  0.004  inches,  send cylinder head to General Support. 34. Check valve seat for correct width, as  shown. If  necessary,  correct width by grinding top edge of valve seat with a stone of smaller angle (preferably 15 degrees) than valve seat. NOTE If valve does not seat properly after  resurfacing valve seats, cylinder head must be sent  to General  Support. 35. Insert valves in cylinder head (6). Invert cylinder head (6). Place straight edge across valves. Measure distance  from  valves to  straight edge. Distance should be 0.000 to 0.014 inches. If necessary, grind seat to different angle to obtain correct distance. Go to sheet 11 4-38