According to the manufacturer, the antifreeze replacement cycle of German cars is changed every two to three years.
It is said here that the antifreeze manufacturer in Xiafei said it will be changed every 120 months and 200,000 kilometers. Yes, you heard correctly. There is evidence in the picture.
I personally understand that as long as the freezing point of the antifreeze conforms to the minimum temperature of the local vehicle environment, it does not need to be replaced in theory.
In addition, another purpose of replacing is to flush the sewer. Some tap water may be added in ordinary times, and even if the pipeline is closed, impurities will inevitably deposit over time.
In short, my conclusion is that after the freezing point drops or after running 50,000 – 60,000 kilometers, it is enough to replace the antifreeze.

Regarding the issue of how to replace it, the formal practice is to drain water from the water outlet in the manufacturer’s maintenance manual, and the lazy practice is to find a connection with a relatively low waterway to drain water.
At that time, when replacing Sagitar antifreeze at the Nanjing Chain Quick Repair Store, the little brother directly found a connector and pulled it out. Water splashed all over the cabin and he lay on the floor.
Then when adding antifreeze, the liquid level was much greater than the highest point of the scale, which made me a little disappointed. This is the practice of small workers in local chain quick repair shops often recommended by a well-known radio station in Nanjing.
Later, I rarely went to the quick repair shop, and I had a lot of fun taking care of it slowly.

Here are a few points to summarize,
1. No matter where you drain water from (the manufacturer’s recommended water outlet may require the car to be raised too high, and what’s more, it may be possible to remove some components, such as air intake pipes),
It is best to use a blower to pressurize the antifreeze kettle, so that more antifreeze can be discharged. Depending on the amount added, you can know whether the replacement has been completely changed.
2. Don’t expect to completely remove all antifreeze. There is a large amount of water in the warm air pipes. If you want to pursue perfection, you can only use the method of changing water twice. Of course, you can do this if you have too much time.
3. The way to get the thermostat to open quickly and go through a large cycle is to turn on the AC. Pay attention to this. Don’t hit the accelerator. The oil is not hot.

** About me **
Love cars, life and travel, especially love old boys who are messing around
Consider full-featured models in the future: Haval H9, Aohu, second-hand Matway 4WD
Regarding car use experience and maintenance experience, everyone is welcome to communicate with each other, play with cars, shoot cars, coordinate Nanjing