ARMY  TM  9-2805-262-14 AIR FORCE TO 38G2-90-1 NAVY NAVFAC P–8-613-14E 4-28.  Spark    Plugs. This  task  covers: a.  Removal b.  Inspection/Test c.   Installation INITIAL  SETUP Tools Materials/Parts General  Mechanic’s  Tool  Kit  (Item  1,  Appendix  B) Rags, Wiping (Item 7, Appendix D) Wrench,  Torque  (NSN  5120-00-640-6364) Solvent,  Drycleaning  (Item  8,  Appendix  D) (Item 5, Appendix B) NOTE The following procedures are the same for all spark plugs. a. Removal.  (figure  4-22). (1) Loosen connector nut (1) and tag and remove high tension cable (2) from spark plug (3). (2) Remove spark plug (3). b.   Inspection/Test.   (figure  4-22). WARNING Drycleaning  solvent  PD-680  used  to  clean  parts  is  potentially  dangerous  to  personnel  and property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of solvent is 100°F-138°F (38°C-60°C). (1) Clean spark plug (3) in drycleaning solvent, and dry thoroughly. (2) Inspect spark plug for stripped threads, burnt electrode, broken or cracked ceramic insulator, and replace  a  damaged  spark  plug. (3) Regap spark plug (3) to 0.028 to 0.033 in. (0.071 to 0.084 cm). c. Installation.   (figure  4-22) (1)  Install  spark  plug  (3)  and  torque  to  23-25ftlb(49115-53580  gr  cm). (2) Install high tension cable (2) and tighten connector nut (1). 4-48