How to remove the scale of Volkswagen Polo 1.4 warm air water tank?

After the automobile water tank scales, it can be cleaned and descaled with water tank cleaning agent. The general cleaning agent can't completely remove the scale and acidic substances in the waterway, and sometimes it can soak off the large scale that falls off, but this will block the waterway, and sometimes it is necessary to remove the water tank for cleaning. If a powerful cleaning agent with good quality is used, the scale will be suspended in the coolant in the form of powder and will not block the water channel in the engine. Therefore, when buying water tank cleaning agent, don't just look at the cheap. In addition, to avoid the generation of scale, we should pay attention to the choice of coolant in the water tank. Many drivers do not pay attention to the use and advantages and disadvantages of coolant, and usually only add ordinary water to the water tank. The most common problems in cooling system are rust, scaling and corrosion. The main reason for this situation is that no good antifreeze is used. A good antifreeze not only has a low freezing point, but also contains additives with various functions, which can inhibit foaming, rust prevention, electrolysis, scale and so on. It is recommended to go to a professional cleaner to wash it.