MAINTENANCE by volume of corrosion-inhibiting antifreeze. Choose one that is large enough to hold the expected quantity of coolant. 3. Check the coolant level and add more coolant if necessary. NOTE: Make sure the coolant can flow unobstructed into the receptacle. 4. Close and tighten the cap on the surge tank. [b] Open the coolant drain plug on the bottom of the radiator. Coolant Flushing and Changing 4. Flush the radiator. NOTICE: HOT COOLANT When flushing the radiator, do not apply more than 140 kPa (20 psi) air pressure. Excessive pressure can damage the radiator or heater core.
To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. [a] Attach a flushing gun nozzle to the radiator outlet. [b] Run water in until the radiator is full. Flush and change the coolant as follows: 1. Open the cap on the surge tank slowly, to allow excess pressure to escape. Set the cap aside. 2. Open the water regulating valve for the heating system. 3. Drain the coolant from the engine. [a] Place a receptacle underneath the coolant drain plug.
84 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION