Adding water directly to a car when it is at a high temperature may lead to serious consequences, especially adding cold water, which can cause cylinder block deformation or cracking due to thermal expansion and contraction. The correct way to handle this is to first stop the car and let it idle, then check the coolant level after the temperature drops naturally. Long-term use will clog the pipes, reduce heat dissipation efficiency, and the low boiling point of water may cause overflow. In emergency situations, water can be added temporarily for emergency purposes, but the special coolant should be replaced as soon as possible. It has rust-proof, anti-freeze and high boiling point properties, which can protect the engine. In winter, it is even more important to avoid using water as a substitute to prevent the water tank from being damaged by freezing and expansion. Regularly checking the condition of the cooling system is a key measure to prevent overheating.
