What does it mean when a car boils over?

[Colin]

When a car boils over, it usually means that the engine's operating temperature has reached a level that is too high for the normal working temperature range, thereby affecting the machine's normal operation and causing damage to it. An excessively high temperature typically refers to temperatures above 85 degrees Celsius, although different engine models have different standards. The higher the temperature exceeds the normal range, the greater the damage to the machine. Once you encounter a car boiling over, the first thing to do is to pull over, but do not turn off the engine. Let the engine idle for a few minutes to allow the water temperature to decrease slightly on its own, then turn off the engine and wait for it to cool down naturally. When you see smoke coming from the hood, never pour cold water onto the engine, as this can cause severe damage to the engine.