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TM   9-2815-202-34 4-38.   CYLINDER   HEAD   REPAIR   (Cont) 4. Thread bridge guide remover (77) into tapped hole. 5. Attach slide hammer (78) to guide  remover  (77)  and  remove guide. (c) Install valve bridge guides as follows: 1. 2. 3. Apply a coat of sealant to bridge guide  (18). Start  guide  (18)  in  cylinder  head with undercut end first. Place  bridge  guide  installer  (79) over guide-(l 8) and drive into place.  Installer  will  position guide  to  correct  height  (2.040 inches)  in  cylinder  head. (5) Valve inserts Inspect  valve  inserts  for  excessive  wear, pitting,  cracking,  or  improper  seat  angle. Replace  inserts  as  follows: (a) (b) (c) Place  cylinder  head  on  wood  blocks with bottom side up. Using valve seat insert remover (80), remove  valve  insert  (81  ). Clean  valve  seat  insert  counterbore in cylinder head and inspect for concentricity,  flatness,  and  cracks. 4-194 C h a n g e     1


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