Will there be consequences if the expansion tank cap fails to release pressure and causes leakage?

[LylaRose]

Yes. After the expansion tank cap is damaged, coolant will spray out from the tank cap. Once the tank cap is broken, the flow of coolant entering the engine will decrease, leading to reduced coolant pressure. The heat generated during engine operation cannot be dissipated, resulting in engine overheating. In severe cases, boiling over may occur. Below are relevant details: 1. Radiator: Most automotive engine cooling systems use an automatically compensated closed radiator, primarily equipped with a reservoir. The reservoir cap has a steam valve and an air valve. The advantage of this design is that it reduces coolant loss in the cooling system while also improving the radiator's heat dissipation performance. 2. Coolant: Coolant is a crucial component of the automotive cooling system. When the engine is running, the coolant continuously circulates within the cooling passages. If the internal pressure becomes too high, the coolant may leak out, potentially causing pipe bursts. The coolant reservoir has maximum and minimum level marks. When adding coolant, ensure it is filled between these two marks.