During winter, when you first crank the car up in the morning, no or little smoke comes out (or fog), but when the car heats up a bit, this smoke increases, mainly due to change in air temperature between the engine and the outside. But why does it go away after a while? Engine is still hot, and outside temperature is still cold!
2007-02-21 04:41:26 · 13 answers · asked by A.Samad Shaikh 2 in Cars & Transportation ➔ Other - Cars & Transportation
Because the condensation from inside the exhaust pipe and mufflers is dissipated, once the condensation is gone the you have just dry heat coming out the exhaust. After you finish driving when the metal in the exhaust system cools condensation is formed again...which you dissipate the next time you fire the car up....hope this helps you.
2007-02-21 04:50:21 · answer #1 · answered by johnkmayer 4 · 1⤊ 0⤋
That's not smoke that comes out its condensation, or steam for a lack of better words. Your engine produces alot of moisture due to burning gasoline, and that moisture builds up in the exhaust pipe cause of the cold. So as the car heats up so does the exhaust and the water is evaporated away quicker and the exhaust is not holding it in there.
2007-02-21 04:50:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The smoke you are seeing isnt smoke at all it is actually fog caused by condensation . Like on the outside of a cold glass of lemonade on a hot day.
2007-02-21 05:56:43 · answer #3 · answered by stick 2 · 0⤊ 0⤋
The white exhaust is steam from the condensation of water of coolant or water coming out the tail pipe. As the engine heats up this water is vaporized and the tailpipe becomes dry. The air coming out of the exhaust is warm but dry and makes no more steam.
2007-02-21 04:50:13 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Because the temperature under the car is warmer...It's like sitting in an open cardboard box with a space heater inside--even though you're still exposed to the elements, the walls of the box are keeping more of the heat in.
2007-02-21 04:44:44 · answer #5 · answered by Crys H. 4 · 0⤊ 1⤋
During the time of non operation some oil has seeped from the gaskets drying out. This should resolve itself, but you should inspect the car for oil leaks on a regular basis until it does. If the leak continues you may have some gaskets to replace.
2016-05-24 02:55:24 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It does you just can't see it in the summer, the hot exhaust coming out out the tail pipe is cooled and gives you the "smoke" effect in the winter! i don't know where you live but in wpg it does not "go away".
2007-02-21 04:45:10 · answer #7 · answered by thewolf2275 2 · 0⤊ 1⤋
Hazarding a guess here - I believe it is mostly steam. Water will condense in your engine as it cools. When you start it up again, that water is heated up which makes steam.
2007-02-21 04:44:36 · answer #8 · answered by Go Bears! 6 · 0⤊ 1⤋
warmer engine burns the fuel more efficiently, with less "waste" in the form of smoke. That's my GUESS.
2007-02-21 04:44:35 · answer #9 · answered by Slappy McStretchNuts 2 · 0⤊ 1⤋
It's the condensation in your exhaust system burning off.
2007-02-21 04:44:18 · answer #10 · answered by aj1964 3 · 2⤊ 1⤋