Is the water level in the water tank high or low when the car is hot?

The water level is high when the hot car is hot, and it is best not to exceed the standard maximum water level when the cold car is low.

Generally speaking, due to thermal expansion and cold contraction, the cooling liquid rises when the car is hot and recovers when it is cold. However, there is an abnormal situation of "cold expansion and heat contraction", which may be caused by turning on the warm air when starting and realizing the constant temperature of the car body by using the circulation of antifreeze.

There is a great difference between hot car and cold car because the engine water temperature rises and the antifreeze expands when hot car is hot, so the antifreeze level will rise when hot car is hot, which will be in contrast with that when cold car is cold. Therefore, if you want to know the remaining amount of antifreeze more accurately, you must observe it in the cold state.

General antifreeze has a main water tank and an auxiliary water tank. When adding, the main water tank can be filled, and the auxiliary water tank should be added to the half tank or the "MAX" mark. Remember not to fill the auxiliary water tank, because the antifreeze will expand when the car is hot, and the expanded antifreeze will flow into the auxiliary water tank. At this time, if the auxiliary water tank is full, only part of antifreeze will overflow, causing waste.

Also, when using antifreeze, remember not to mix other antifreeze with different brands and models, and don't use it with water, which may make antifreeze lose its original effect. Don't use concentrated antifreeze directly. Concentrated antifreeze may not meet the engine's demand for antifreeze, but it will have some adverse effects.