ARMY TM 9-2805-257-14 AIR FORCE TO 38G2-103-2 NAVY NAVFAC P-8-612-14E 4-19. 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 6, Appendix D) Wrench, Torque (NSN 5120-00-640-6364) Solvent,  Drycleaning  (Item  7,  Appendix  D) (Item 2, Appendix  B) NOTE This engine has two spark plugs. Perform all procedures on one plug then the other. a. Removal. (figure 4-8) (1) Loosen connector nut (1) on high tension cable (2) and remove cable from spark plug (3). (2) Remove spark plug (3) and washer (4). b. Inspection/Test. (1) (2) 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). Clean  spark  plug  using  drycleaning  solvent,  and  inspect  plug  for  burning,  cracked  or  broken  ceramic insulation, and damaged thread. Replace plug if damaged. Regap spark plug to .028 to .033 in. (.071 to .083 cm). c. Installation.  (figure 4-8) (1) Install spark plug (3) and washer (4) and torque to 275-300 in.-lbs (49115-53580 gr cm). (2) Install high tension cable (2) on spark plug (3) and tighten connector nut (1). 4-22