When you pour cold water on an overheated engine, the sudden temperature difference can cause the metal to contract rapidly. This can put stress on the engine block, causing it to crack.
In addition, the cold water can cause the engine to cool down too quickly, which can lead to other problems, such as warping of the engine head or damage to the pistons and rings.
It is important to note that pouring cold water on an overheated engine is a dangerous practice that can cause serious damage to your vehicle. If your engine overheats, it is best to let it cool down slowly by turning off the engine and allowing it to sit for a few minutes before adding coolant.
