TM 10-3930-664-24 7. INSTALL RADIATOR HOSES (2, 5) AND AERATOR HOSE (7). a. Connect upper radiator hose (2) to engine water inlet   (3)   and   radiator.      Secure   by   tightening clamps (1). b. Connect lower radiator hose (5) to engine water outlet   (6)   and   radiator.      Secure   by   tightening clamps (4). c. Connect aerator hose (7) to radiator and engine. NOTE Use   a   50-50   mix   of   ethylene   glycol (MIL-A-46153)    and    clean    water    for radiator  coolant.    Plain  water  is  not recommended.    Mix  coolant  mixture before pouring into radiator. 6. FILL    RADIATOR    WITH    COOLANT    (5    GALLON CAPACITY).    CHECK  FOR  LEAKS  AND  TIGHTEN CONNECTIONS AS REQUIRED. INSTALL RADIATOR CAP. FOLLOW-ON MAINTENANCE: Install radiator baffles (para.  2-48) END OF TASK 2-150