1. First, make a comprehensive inspection to see if there are signs of leakage and cracks in each pipeline; After confirming that there is no problem, you can drain the old antifreeze and then clean the liquid channel with clear water.
2. Add clean water to the antifreeze replenishment tank, then inject clean water into the tank to make the clean water continuously flow through the engine cooling system, and then idle for 3 to 5 minutes to make the water circulate. Be careful not to forget to remove the heating water pipe and drain the water in the heating water tank.
3. After draining about 1 hour, add new antifreeze from the water pipe of the water tank (radiator), which is the way to make antifreeze flow into the water tank quickly. Then add a bucket of antifreeze to the antifreeze tank until the antifreeze tank is almost full, and keep running for about 10 minute. At this time, the liquid level of the cooling system drops due to the exclusion of some air, and then antifreeze is added to the oil tank until it is filled with the highest mark "MAXT".