TM 9-2320-361-10 2-37. OPERATION IN EXTREME HEAT (Contd) (4) Frequently check temperature gage (2) and oil pressure gage (1). Engine is overheating if one or more of the following conditions exist: (a) Engine coolant temperature is more than 210°F as indicated by temperature gage (2). (b) Engine oil pressure drops below 10 psi with engine at idle as indicated by oil pressure gage (1). (5) If engine overheating occurs: Do not raise hood. Engine will cool faster at idle with hood closed, Raising hood may result in engine damage from prolonged overheating. NOTE Radiator fan and engine coolant will begin lowering engine temperature a few minutes after vehicle stops. (a) Park vehicle, allowing engine to idle. Refer to para. 2-17. CAUTION If engine temperature continues to rise or does not show signs of decreasing after two minutes of idling, stop engine (refer to para. 2-17) and perform troubleshooting procedures (refer to table 2-1). (b) Observe temperature gage (2) and oil pressure gage (1) for signs that engine is steadily cooling. (c) Stop engine (refer to para. 2-17) when engine temperature reaches normal operating range of 180°F to 200°F as indicated by temperature gage (2). (d) Perform troubleshooting procedures. Refer to table 3-1. 2-186