Why are car water tanks painted black?

It is not that the water tank is painted black, but the antifreeze in the water tank is black. It may be because the antifreeze is mixed with some engine oil, which causes this phenomenon, or it may be because of the oil radiator or filter. If there is a problem with the device, it may also be caused by aging of the seal. Generally, common antifreeze liquids have colors, the most common ones are pink and blue. When the missing liquid is found to be of these two colors, it must be antifreeze.

Not only can it prevent the car from "boiling" (the temperature is too high), but it can also effectively prevent icing when parking in cold areas. To a certain extent, it can also prevent corrosion and The role of scale. Then some friends will ask why the antifreeze changes color. Let’s answer it for you below.

If the antifreeze changes color, it is probably because the antifreeze has deteriorated. Not only does it not have a good antifreeze effect, but the cooling effect on the engine has also been reduced. Then when the engine is running at high temperature.

Because there is no good cooling effect, the viscosity of the engine oil will also decrease, which will wear the engine parts over time, and even directly scrap it. We must know that the maintenance cost of the engine is not low, so we should pay attention to the antifreeze replacement cycle.