Before completely replacing the antifreeze, it is necessary to conduct a comprehensive inspection to see if there are any signs of leakage and cracks in each pipeline. The key point is to check the five-way water pipe, which is named after the five interfaces connecting all parts. The antifreeze is distributed to different parts of the car after flowing through the five-way water pipe. If there is antifreeze leakage in this part, replace the water pipe or re-fix the interface according to the situation.
Drain the old antifreeze, and then clean the liquid channel with clean water. 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 circulate water. 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.
After draining about 1 hour, add new antifreeze from the water pipe of the water tank (radiator), which is the method to make antifreeze flow into the water tank quickly. Then add another bucket of antifreeze to the antifreeze tank until the antifreeze tank is almost full, and take a taxi for about 10 minutes. At this time, the liquid level of the cooling system drops due to the exclusion of some air, and then antifreeze is added until the highest mark of the storage tank is filled.