ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 3-7 CAUTION When cleaning, engine must be COLD (same temperature as outside air).   DO NOT point water stream directly at any electrical connection.  DO NOT   use   high   pressure   water   supply   system.      Damage   to   engine, electrical system, and other components may result. NOTE Only use those authorized cleaning solvents or agents listed in Appendix E, Expendable and Durable Items List. a.    When using water to clean the engine assembly, always cover all air ducts and exhaust ports using waterproof material to prevent damage to components.  Cover all electrical components and connections.  Use water  pressure  and  volume  similar  to  a  standard  household  water  supply  (50  PSI  maximum,  3  gallons  per minute). b.    After  cleaning,  allow  engine  assembly  to  air  dry.    Do  not  use  compressed  air  to  dry.    Do  not  run engine to decrease drying time. c.    Remove all component covers after cleaning. CAUTION Keep  cleaning  solvents,  gasoline,  and  lubricants  away  from  rubber  or soft plastic parts.  Solvents will deteriorate these materials. d.    When cleaning grease build-up or rusty places, use cleaning solvent (Item 7, App. E), then apply a thin coat of light oil (Item 6, App. E) to affected area.