(1) Shut down engine (TM 10-3930-673-
10) and let it cool to ambient
(2) Relieve pressure on cooling system.
(3) Remove, inspect, and test thermostat
to determine if it is functioning
(a) If thermostat is functioning,
reinstall thermostat and go to
Step 7 of this fault.
(b) If thermostat is faulty, replace
thermostat (Para 7-3).
Listen for rattles and/or squeals from water
pump. Visually inspect water pump for leaks.
(a) If pump is free from unusual noise
and leaks, go to Step 8 of this fault.
(b) If pump makes unusual noise and/
or leaks, pump worn and/or faulty.
Shut down engine
(TM 10-3930-673-10) and replace
pump (Para 7-5).