www.changlin.com.cn Coolant System Flushing Fill the system with a mixture of sodium carbamate and water (or a commercially available equivalent). NOTE: Use 0.5 kilogram [1.0 pound] of sodium carbonate for every 23 liters[6.0 U.S. gallons]of water. C aution: Do not install the radiator cap. The engine is to be operated without the radiator cap for the coolant system flushing process. Caution: During filling, air must be vented from the engine coolant passages. Open the engine venting petcock and the petcock on the after cooler for after- cooled engines. The system must be filled slowly to prevent air locks.
Wait 2 to 3 minutes to allow air to be vented, then add mixture to bring the level to the bottom of the radiator filler neck. Shut the engine off, and drain the cooling system. NOTE: Do not install the radiator cap or the new coolant filter. Operate the engine for 5 minutes with the coolant temperature above 80°C [176°F], Shut the engine off, and drain the cooling system. NOTE: If the water being drained is still dirty, the system must be flushed again until the water is clean. 62 / 149 pages the ting for lled s to the lant m. Fill the cooling system with clean water. NOTE: Be sure to vent the engine and after coolers for complete filling.
perate the engine for 5 minutes with the coo lant mperature above 80°C [176°F].