Alternative method:
Step 1: First, do a comprehensive inspection to see if there are cracks and leaks in the pipeline, focusing on the inspection of the five-way pipe. The antifreeze is distributed to different parts of the car after flowing through the five-way pipe.
Step 2: Drain the old antifreeze, clean the liquid passage with clear 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, then start idling for 3 to 5 minutes to make the water circulate, and start to flow out the light pink water from the water tank, and continue to inject clear water until the flowing water is clean. Don't forget to remove the heating water pipe and clean the water in the heating water tank.
Step 3: After draining about 1 hour, add new liquid from the water pipe of the water tank (radiator), and then add a bucket of antifreeze to the antifreeze tank until the antifreeze tank is almost full. The vehicle is ignited and runs for about 10 minutes. At this time, the liquid level of the cooling system drops due to the exclusion of some air. At this time, antifreeze should be supplemented to keep the liquid level between the maximum value (max) and the minimum value (min).