TM 9-2320-386-10 2-85 2-34. OPERATION IN EXTREME HEAT (Contd) (5) If engine overheating occurs: NOTE Do not raise vehicle hood. Engine will cool faster at idle with hood closed. (a) Park vehicle, allowing engine to idle. CAUTION If engine temperature continues to rise or does not show signs of decreasing after two minutes of idling, shut down engine and refer to troubleshooting (table 3-1). (b) Observe engine coolant temperature gauge (2), transmission oil tem- perature gauge (5), and engine oil pressure gauge (4) for indications that engine or transmission is steadily cooling. (c) Shut off engine when engine coolant temperature reaches normal operating temperature of 160°-230°F (71°-110°C) as indicated by engine coolant temperature gauge (2). (d) Perform troubleshooting procedures as listed in table 3-1, after engine has cooled to normal operating temperature of 160°-230°F (71°-110°C). .WARNING. Extreme care should be taken when removing surge tank filler cap if temperature gauge reads above 160°F (71°C). Steam or hot coolant under pressure will cause injury. 1 2 3 4 5