TM   5-2815-241-34&P CYLINDER  HEAD  -  CONTINUED ACTION LOCATION ITEM REMARKS REPAIR/ASSEMBLY - CONTINUED 62.  Cylinder  head  (1) Valve  (2) NOTE a. Using  plastic-faced  hammer,  tap  stem end of valve and retest by repeating steps 60 and 61. If  valve  seating  Is  satisfactory, proceed   to   next   step. b. Check  for  leaking  connections  in  tester by placing vacuum cup against a clean window  glass  or  any  smooth  flat  surface. Repair any leaks In test equipment. c. Check  valve  and  seat  area  to  be  sure they are free of dirt particles, Retest valve    seating. If valve seating Is unsatisfactory, regrind seat and reface valve. See steps 32, 33, and 34 and steps 49, 50,  and  51. It is possible to mistake leakage around valve seat insert for valve seat leakage. If this type  of  leak  is  suspected,  proceed  with  the  following  step. 63.  Cylinder  head  (1) Valve seat insert (3) a. Apply   extreme-pressure   grease   around outside edge of valve seat insert to make a  grease  seal. b. Perform vacuum test and inspect grease seal for a break indicating air leakage between wall of counterbore and valve seat   insert. Restake  valve  seat  Insert.  See step   31. c. Vacuum test and recheck for air leakage around   valve   seat   insert. If air leakage Is present, see steps 26 thru 31. Replace valve seat Insert. 2-212