ARMY  TM  9-2805-262-14 AIR  FORCE  TO  38G2-90-1 NAVY  NAVFAC  P-8-613-14E 5-6. General.  This section contains direct support maintenance procedures as authorized by the MAC in Appendix B of this manual. Table 5-2 located at the end of this section contains a list of engine components and their wear limits. Any item that does not meet the specified measurements must be replaced. Refer to Appendix E for torque values. All maintenance procedures require only one person to perform. 5-7.  Cylinder   Head   Assembly. This  task  covers: a. Test c.  Repair b.  Removal d.  Installation INITIAL  SETUP Tools General  Mechanic’s  Tool  Kit  (Item  1,  Appendix  B) Wrench,  Torque  (NSN  5120-00-853-4538)  (Item  5, Appendix  B) Tester, Cylinder Compression (NSN  4910-00-249-7318)  (Item  2,  Appendix  B) Compressor,  Valve  Spring  (NSN  5130-00-096-6677) (Item 3, Appendix B) Materials/Parts  (cont) Gasket,  Cylinder  Head  Mounting (NSN   5330-00-819-8734) Packings,  Preformed  Cylinder  Head  End (NSN  5330-00-797-3510) Packings,  Preformed,  Crankcase  End (NSN   5330-00-001-4811) Equipment  Condition Materials/Parts Rags,  Wiping  (Item  7,  Appendix  D) Solvent,  Drycleaning  (Item  8,  Appendix  D) Spark  plugs  removed  for  cylinder  head  removal (para.4-28). Intake  manifold  adapter  removed  for  cylinder  head removal  (para.4-39). a. Test. (figure 5-1) (1) (2) (3) (4) (5) (6) (7) (8) (9) 5-6 Loosen  connector  nut  (1) Remove spark plug (3). and remove high tension cable (2) from spark plug (3). Install  pressure  gage  (4). Using  starter  rope,  crank  engine  several  times  and  read  pressure  gage  (4). Compression reading should be 90 psi (620 Kpas) at sea level. The reading will decrease as altitude increases. Make note of reading. Remove  pressure  gage  (4). Install spark plug (3). Install high tension cable (2) and tighten connector nut (1). Repeat steps 1 thru 8 for remaining cylinders.