What Causes White Smoke from the Exhaust Pipe in Winter?

[StPaige]

Reasons for white smoke from the exhaust pipe in winter: 1. Normal condition: The water vapor produced after gasoline combustion is normally discharged through the exhaust pipe. Due to the low external temperature, the water vapor condenses into small water droplets, becoming visible water vapor to the naked eye; 2. Fault condition: Some coolant enters the cylinder and is discharged with the exhaust gas. Because the temperature is very high, it appears as water vapor. If it is the first start after a long period of parking, the engine is in a cold state, the idle speed is relatively high, more gasoline is burned, and more water vapor is produced. This is also related to the thickness of the car's exhaust and the size of the catalytic converter mesh. If the engine is in a hot state, with good working conditions and reduced fuel consumption, the white smoke will also decrease accordingly.