The water level is high when the car is hot and low when the car is cold. It is best not to exceed the standard maximum water level when the car is cold.
Generally, due to thermal expansion and contraction, the coolant rises when the car is hot and recovers when the car is cold. However, an abnormal situation of "cold expansion and heat contraction" occurs. When the "hot car coolant drops and the cold car recovers" situation, the reason may be caused by turning on the warm air during startup. The circulation of antifreeze is used to achieve a constant temperature of the body. state.
The difference in antifreeze level between a cold car and a hot car is because when the car is hot, the engine water temperature rises and the antifreeze expands. Therefore, the antifreeze level will rise when the car is hot, which is different from when the car is cold. The antifreeze level will be in contrast. Therefore, if you want to know more accurately the remaining amount of antifreeze, you should observe it when the car is cold.
Generally, antifreeze has a main water tank and an auxiliary water tank. When adding, the main water tank can be filled up, and the auxiliary water tank should be added to half a tank or to the "MAX" mark. Remember not to fill up the auxiliary water tank, because When the car is hot, the antifreeze will expand, and the expanded antifreeze will flow into the auxiliary water tank. If the auxiliary water tank is full at this time, only part of the antifreeze will overflow, resulting in waste.
When using antifreeze, remember not to mix other brands and models of antifreeze, and do not mix it with water. This may cause the antifreeze to lose its original effect. Do not use concentrated antifreeze directly. It may not meet the engine's demand for antifreeze, but may have some adverse effects.