What to Do When the Car Coolant Temperature is Too High?

[DeCora]

Immediately pull over to the side of the road, you can slightly unscrew the radiator cap to allow steam to slowly escape. After the radiator pressure decreases, replenish the coolant. To prevent the water temperature from getting too high, it is necessary to regularly clean the car's cooling system. Regularly check the coolant level in the radiator, and when adding coolant, be aware that different brands of coolant should not be mixed.

[StTucker]

As an ordinary car owner, I find that excessively high coolant temperature is quite dangerous. You must pull over immediately, turn off the engine, and let the car cool down for at least fifteen minutes. Never rush to open the hot water cap, as boiling water can spray out and cause injury. At this point, check the coolant reservoir level—if it's low, it might indicate a leak or excessive evaporation. Adding distilled water can serve as an emergency fix, but professional coolant is the best option. If the fan isn’t spinning or sounds abnormal, it could be a motor issue, especially more prone in high summer temperatures. Regular maintenance is crucial—changing the coolant every two years helps avoid radiator clogs and engine overheating.