Why Does the Vehicle Exhaust Pipe Drip Water?
1 Answers
Because gasoline completely burns to produce water vapor and carbon dioxide, when the ambient temperature is low, the white smoke emitted from the exhaust pipe is water vapor. When water vapor flows through the metal pipe, it condenses into water droplets. Engine dripping is generally a normal phenomenon, but there are exceptions: if the cooling water tank in the engine leaks and cooling water enters the combustion chamber, it can also cause the exhaust pipe to drip water. If you feel that your car's dripping is abnormal, you can check whether the cooling water tank in the engine compartment is leaking to rule out this possibility. If the exhaust emits a milky white oil mist that solidifies into lumps when it drips on the ground, it is likely due to poor fuel vaporization. This is mainly caused by low temperatures leading to poor fuel atomization, and it usually disappears as the engine temperature rises after starting. Although dripping water from the car's exhaust reflects the car's performance, it is not necessarily better the more it drips. Excessive water in the exhaust pipe can damage the oxygen sensor in the three-way catalytic converter, leading to inaccurate fuel supply to the engine and affecting the car's performance. On the other hand, water droplets staying in the exhaust pipe for a long time can also accelerate pipe corrosion. Therefore, cars are designed with a small hole at the bottom of each exhaust pipe. So, if you notice rust spots on your car's exhaust pipe, it is recommended to check whether the small hole in the exhaust pipe is blocked and clean it in time.
