How long and how to replace Buick Lang Wei antifreeze?

Lang Wei's new cars are all added with factory antifreeze. Generally, new cars need to be replaced with antifreeze after 2 years or 40 thousand kilometers! If it is found that the antifreeze coolant is lower than the minimum scale value (the normal capacity of antifreeze coolant should be between min and MAX) during the period of not replacing antifreeze coolant, it should be increased in time, otherwise it will affect the cooling efficiency of the engine. The steps of Weilangjia antifreeze are as follows: First, give your car a comprehensive inspection to see if there are any signs of cracks and leakage in the pipeline. It's best to focus on the five-way pipe, that is, there are five interfaces connecting all parts. Be sure to observe carefully, because antifreeze must flow through the five-way pipe and then be distributed to different parts of the car to play its role. The second step, mainly cleaning, is to discharge the previous antifreeze, clean the liquid passage with clear water, add the clear water into the antifreeze replenishment tank, then inject the clear water into the tank to make the clear water continuously flow through the engine cooling system, and then idle for 3-5 minutes to allow the water to circulate. The water that began to flow out of the water tank was a little pink. Continue to inject clean water until it is clean. Don't forget to remove the heating water pipe and drain the water in the heating water tank. Step three, we need to replace the antifreeze. In order to make antifreeze flow into the water tank quickly, after draining for about 1 hour, add new antifreeze 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, and the car will ignite for about 10 minutes. At this time, the liquid level of the cooling system will drop, and antifreeze will be added at this time.