TM 9-2320-209-20-3-1 b. Draining. WARNING Do not open filler cap (1) if engine is hot. Pressure will blow out scalding fluid and vapor. Personnel can be badly burned. 1. Press down and turn filler cap (1) all the way to left and lift it off. 2. Put containers under engine block drain cock (2) and radiator drain cock (3). Using pliers, turn two drain cocks to left and let coolant drain into two containers. 3. When all coolant has drained out, turn two drain cocks (2 and 3) to right to close them. 4. Empty coolant in approved disposal area. END OF TASK 6-50