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ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 3-34.5.  Assembly. a. Install valve inserts (10 and 11, FIGURE 3-99) as follows:  NOTE If valve with an oversize stem is to be used, an oversize valve seat insert must be installed. (1) Use pilot driver (JDG-676) and valve seat insert installing adapter (JDG-675) to install valve seat inserts (10 and 11) in cylinder head (2). (2) Use one end of adapter (JDG-675) to install intake valve seat inserts and the other end to install exhaust valve seat inserts. (3) Install valve and check valve recess, refer to paragraph 3-34.2. (4) Grind  valve  seats  as  required  to  maintain  correct  valve  recess  and  valve-to-valve  seat  seal,  refer  to paragraph 3-34.4.  step m. b. Apply clean engine lubricating oil (MIL-L-2104) to valve stems (7 and 8) and guides. NOTE Valves must move freely in guide bore and seat properly in head to form an effective seal. c. Insert valves (7 and 8) in head (if valves are reused, insert in same guide bore from which removed). d. Use soft rubber mallet to install slide valve stem seals (9) over valve stems and onto valve guide tower. e. Position valve springs (6) in machined counterbore of head. f. Install valve rotators (5). g. Compress valve springs (6) using valve spring compressor and install valve spring locks (4) on valves. h. After  installing  valves,  strike  end  of  each  valve  three  or  four  times  with  a  soft  rubber  mallet  to  ensure  proper positioning of valve spring locks (4). 3-145


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