Reasons for White Smoke from Diesel Engines?

[DeSebastian]

There are two main reasons for white smoke from vehicle exhaust: low temperature and water entering the cylinders. Below is a detailed explanation of the causes of white exhaust smoke in winter: Low Temperature: Normal combustion of gasoline can cause white smoke from the exhaust pipe. The primary products of complete gasoline combustion are carbon dioxide and water, along with small amounts of other impurities. Due to low winter temperatures, both the exhaust pipe and the air inside it are cold. When the engine is first started, water vapor expelled from the cylinders rapidly condenses into mist upon encountering the cold exhaust pipe and air. This mist is expelled as white smoke. Water in Cylinders: Water entering the cylinders can produce large amounts of white smoke. If the cylinder head gasket is damaged, the seal between the cylinder block and cylinder head becomes compromised, allowing coolant to leak into the contact area between them. In severe cases, coolant may even flow directly into the oil passages. Water in the cylinders evaporates into steam, which is then expelled through the exhaust pipe as white smoke.