TM 10-3930-659-20 5-34. ENGINE THERMOSTAT AND HOUSING MAINTENANCE (Con't). b. ENGINE THERMOSTAT HOUSING REMOVAL WARNING Servicing of engine cooling system should only be performed on a cool engine. NEVER remove  clamps  or  hoses  when  engine  Is  hot.    Pressurized  steam,  hot  water,  or  coolant will cause serious burns. 1. Loosen  clamp  (11)  and  remove  upper  engine radiator    hose    (1)    from    engine    thermostat housing cover (10). 2. Remove   two   screws   (18),   lockwashers   (19), engine  thermostat  housing  (7),  and  gasket  (12) from   engine   (14).      Discard   lockwashers   and gasket. 3. Remove   preformed   packing   (15)   from   water pump (13).  Discard preformed packing. 4. Remove  tube  (16)  and  preformed  packing  (17) from   water   pump   (13).      Discard   preformed packing. TA706914 5-98