What's the smell of white smoke from the exhaust pipe of a car?

It is normal for an automobile exhaust pipe to emit white smoke, but if it emits a lot of white smoke, it may be that the engine piston has failed and started burning engine oil. As for the smell, it is generally due to the smell released by the silicon material inside the three-way catalyst after heating, which is a normal phenomenon. But if the pungent smell is getting heavier and heavier, you need to go to the store for inspection and maintenance.

Normal white smoke is caused by the high temperature of exhaust gas discharged from the exhaust pipe. The high-temperature steam quickly turns into small water droplets in the air with lower temperature, thus producing "white smoke", which is also called liquefaction in physics. If there is a lot of white smoke, it is not ruled out that the engine piston breaks and the oil begins to burn.

In addition, it may be because there is too much water in gasoline, so it is recommended to clean the throttle. If there is water in gasoline, check whether there is water leakage or oil leakage at the joint of cylinder head and cylinder gasket. If there is, it will damage the cylinder gasket and cause leakage.

As for the pungent smell, the new car is generally due to the smell released by the silicon material inside the three-way catalytic converter after heating, which is a normal phenomenon.

Finally, the engine will emit white smoke when it is started at low temperature, but it is normal for the white smoke to disappear with the increase of engine temperature. But the more you refuel, the stronger the smoke and the more pungent the smell. It is still recommended to go to the 4S shop for inspection and maintenance.

Million car purchase subsidy