It is possible that during driving, the high-temperature environment of the engine causes the antifreeze to heat up, reach boiling point, and subsequently overflow. Alternatively, the antifreeze may not be circulating properly due to a malfunctioning thermostat, a non-operational water pump, or a blockage in the coolant circulation system, leading to the antifreeze spraying out. If antifreeze sprays out, it is recommended to pull over and let the engine idle for a while to allow the temperature to gradually decrease. Check if the cooling system is functioning properly and inspect the antifreeze level. Do not turn off the engine immediately, as stopping the cooling fan and coolant circulation will cause the engine to become even hotter. Open the hood to increase airflow and allow the water temperature to drop before removing the radiator cap. Turn it to the first position and wait for the internal steam to escape before fully opening it. Do not add coolant immediately, as boiling water in a sealed container creates pressure. Opening the radiator cap right after boiling can cause the pressurized water to spray out, leading to burns. Afterward, check the radiator hoses for leaks. If the overheating is due to low antifreeze levels, replenish it once the engine temperature has decreased. In emergencies, if antifreeze is unavailable, you can add a small amount of water and proceed to the nearest repair shop for maintenance or replacement.
