Is it normal for the daily sunshine auxiliary water tank to have no water?

It is abnormal that the auxiliary water tank has no water. If the water pipes of the main water tank and the auxiliary water tank are connected with the water tank cover normally, the main water tank of the automobile will suck the water from the auxiliary water tank without water, and the auxiliary water tank will retain half of the coolant, but it is impossible without water. The reasons why the auxiliary water tank of automobile is often short of water are: 1, and the cylinder gasket is broken; 2. Water pipe leaks; 3. The water tank leaks or the switch leaks; 4. The heater water tank leaks; 5, blocking water. Automobile auxiliary water tank is an integral part of engine cooling system, which plays a role in balancing the pressure of water tank. When the engine temperature is high, a part of antifreeze flows into the auxiliary water tank through the water tank cover. When the temperature drops and the cooling system pressure is negative, the system sucks the antifreeze in the auxiliary water tank into the cooling system through the water tank cover.