What to Do When Water Comes Out of the Exhaust Pipe in Winter?

[BenjaminDella]

During the operation of a car engine, water may sometimes be discharged from the exhaust pipe, especially in winter, which can be more noticeable. This might mistakenly be perceived as a cooling system malfunction or a leakage issue. In reality, water discharge from the exhaust pipe is a completely normal physical phenomenon and even an indication of complete gasoline combustion. The reasons for water in the exhaust pipe are as follows: 1. After gasoline combustion, it mainly produces carbon dioxide, water, and a small amount of carbon monoxide. For every 1 kilogram of gasoline mixed with air and burned, approximately 1.42 kilograms of water are produced, mostly discharged into the atmosphere in gaseous form. 2. Since the main muffler is located at the rear of the car where the temperature is relatively low and it has a multi-chamber structure, it is prone to water accumulation. When the engine runs at high speed, the accumulated water inside is expelled under the airflow, resulting in the commonly observed water ejection phenomenon. Vehicles frequently driven at low speeds on congested roads, especially in winter, may experience slightly more severe water accumulation in the muffler.