2. Drainage: Before replacing the new antifreeze, it is best to clean the liquid channel with clear water and drain the old antifreeze. The specific operation method is to add clear water to the antifreeze replenishment tank, then inject clear water into the tank to make the clear water continuously flow through the engine cooling system, and then idle for 3 to 5 minutes to make the water circulate. The water in the pitcher is a little pink at first. Continue to inject clean water until the water becomes clean. Be careful not to forget to remove the heating water pipe and clean the water in the heating water tank.
3. Replace new liquid: After draining about 1 hour, add new antifreeze from the water pipe of the water tank (radiator), which is the way to make the antifreeze flow into the water tank quickly. Then, add another bucket of antifreeze into the antifreeze tank until the antifreeze tank is almost full, and keep running for about 10 minute. At this time, due to the exclusion of some air, the liquid level of the cooling system drops, and then antifreeze is added until the highest mark "MAXT" of the oil storage tank is filled.