Why does smoke come out cars muffles when its cold outside?

Answer 1

the same reason you can see your breath when its cold out. Its warmer than the outside air.

Answer 2

It isn't smoke, per se. What you are seeing is the condensation of moisture, just like the breath you see when you are in cold weather.

Once the moisture is heated and gone out of the muffler, it pretty much stops, until you turn the engine off for a little while. And when you start it up, the same thing starts all over. The heat causes the moisture to condense when it comes out of the exhaust pipe.

Some of it also is in the exhaust remains from the engine when it fires. Not everything is used when the explosion occurs and what is left has the property of picking up moisture along the way out and it being superheated, quickly starts to cool, and moisture forms, thus what you see coming out of the pipe.

Answer 3

It isn't smoke, it is steam and water vapor.
The natural result of gasoline burning is carbon dioxide and water vapor.
When it is cold outside, and the exhaust and exhaust system haven't yet warmed up to normal, the steam and water vapor are still visible. When it reaches the normal temperature range, the steam and vapor become superheated, and no longer visible to the eye.

Happy Motoring

Answer 4

Could be two reasons. !st and most likely is the hot exhaust mixing with cold air causing steam condensation. 2nd may be the fact that the engine is worn if the smoke is dark in color as in being blue or black. More than not it will be reason #1 and that will always be white in color.

Answer 5

In a word, oil. your gears in your engine don't move as easily when they're cold, so your car automatically adjusts by pumping more oil through your components in your engine. however, if your car is spiting out an excessive amount of smoke, or the smoke is really black, you might want to have a mechanic look at it, because it might be overcompensating with the oil.

Answer 6

As exhaust systems cool, they bring in moisture in the air. This moisture is expelled as white smoke AKA steam as they warm up

Answer 7

Because the engine is hot, and evaporates all the moisture that built up in the exhaust system.
It's basically the same reason you can see your breath in winter and not summer.

Answer 8

moisture than condensates in the system when cools down and when heats back up once vehicle is started causes it to evoparate hence steam

Answer 9

The same reason you see your breath when it is cold outside.

Answer 10

thats not smoke.thats steam.