Flushing Cooling System
- Fill the radiator and reservoir tank with water, and then reinstall the filler cap.
- Run the engine and warm it up to normal operating temperature.
- Rev the engine two or three times under no-load.
- Stop the engine and wait until it cools down.
- Drain the radiator/cooling system.
- Repeat steps 1 through 5 until clear water begins to drain from the radiator.