TM 9-2320-366-10-1
2-27. VEHICLE OPERATION (CONT)
NOTE
• Water Temperature must be a minimum of 100F (38C) in order to drive
vehicle. Engine will warm up to normal operating temperature of 165F
(74C) more quickly if engine is under a load condition such as driving.
• Vehicle performance, including heater/defroster, will be reduced when engine
operating temperature is between 100F to 165F (38C to 74C). Avoid
conditions requiring maximum performance until engine reaches 165F
(74C).
(11) Operate engine at idle (750 rpm) to warm-up engine until WATER TEMP gage (11)
reaches a minimum of 100F (38C) to begin driving or normal operating temperature
of 165F (74C).
NOTE
Perform step (12) in outside temperatures of 32F to -25F (0C to -32C),
if extreme or unusual conditions exist such as heavy windshield frost or when
it is difficult to achieve normal operating temperature of 165F (74C).
(12) Perform Rapid Engine Warm-Up (para 2-70).
(13) Check that WATER TEMP gage (11) reads between 100F to 230F (38C to 110C).
If WATER TEMP gage reads in the red zone or high engine temperature indicator
(12) is illuminated, shut down engine (para 2-27f) and perform Engine
Troubleshooting (para 3-3).
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