What Causes Water to Come Out of the Engine Exhaust Pipe?

[SanAshley]

Engine exhaust pipe discharging water is caused by the exhaust gas containing water vapor and the exhaust pipe being in a cold state. The specific reasons are as follows: Exhaust gas contains water vapor: The car engine inhales air and atomized gasoline, which is then ignited by the spark plug to perform work. After complete combustion, the combustible gas becomes exhaust gas, the main components of which are carbon dioxide and water vapor. The exhaust gas temperature in the car's exhaust pipe is very high, but the ambient temperature is relatively low. When the water vapor component encounters the surrounding low temperature, it condenses into small water droplets. The exhaust pipe is in a cold state when the car starts: When the car is just started, the entire exhaust pipe is in a cold state. The small water droplets condensed from water vapor accumulate in the exhaust muffler to form accumulated water. When the accumulated water reaches a certain level, water can be seen spraying out from the exhaust pipe. In fact, this indicates that the engine combustion is good and the working condition is normal.