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      01-29-2012, 10:36 AM   #1
Soikiu
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Lots of vapor / white exhaust when I start the car

Hi Bros,

Recently I noticed my car has a lot of "white exhaust" or rather vapor when I start the car, be it in the morning or at night. I thought it is because of the cold weather but it occurs even when it's not that cold. I can see it on my rear view mirror even when other cars on the street are ok. It only happens when the car is idling. Any thoughts?

Recording from this morning:
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      01-29-2012, 10:52 AM   #2
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Quote:
Originally Posted by Soikiu
Hi Bros,

Recently I noticed my car has a lot of "white exhaust" or rather vapor when I start the car, be it in the morning or at night. I thought it is because of the cold weather but it occurs even when it's not that cold. I can see it on my rear view mirror even when other cars on the street are ok. It only happens when the car is idling. Any thoughts?

Recording from this morning:
I have that too during the CNY holiday
It must be the weather
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      01-29-2012, 11:15 AM   #3
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Quote:
Originally Posted by Namreh View Post
I have that too during the CNY holiday
It must be the weather
I thought so too but it happens almost all the time... even when there's none on the other cars...
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      01-29-2012, 11:40 AM   #4
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I think that is normal as fully combustion of petrol the result is water vapour.
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      01-29-2012, 12:25 PM   #5
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I have this as well especially in the first 30minutes after engine started. I do not see it in theses two days. I thought it is normal because the weather.
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      01-29-2012, 07:54 PM   #6
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as long as it is white and there is no bad smells, it's probably water vapor. And in fact it is a good sign showing your engine is in good shapes.
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      01-29-2012, 09:44 PM   #7
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Quote:
Originally Posted by little_croco
as long as it is white and there is no bad smells, it's probably water vapor. And in fact it is a good sign showing your engine is in good shapes.
That's comforting bro...
Yes - there's absolutely no smell in it

Last edited by Soikiu; 01-29-2012 at 10:34 PM.
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      01-29-2012, 10:49 PM   #8
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Vapour coming from front ventilation inside your car right? It's normal condensation. I also have it even during the humid summers.
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      01-29-2012, 11:28 PM   #9
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Quote:
Originally Posted by cc_bavarian View Post
Vapour coming from front ventilation inside your car right? It's normal condensation. I also have it even during the humid summers.
Exhaust bro...
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      01-30-2012, 03:04 AM   #10
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Ah ok.

Moisture bro. Newer cats and exhaust does this.

A blown head gasket? Check under oil cap to see if there's thick substance. Water and coolant may have gone into the combustion causing vapor. Since you say there's no smell, then I don't think this is the case.



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Exhaust bro...
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      01-30-2012, 03:39 AM   #11
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Yeah, I was reading up on it today. As long as it doesn't continue throughout the drive, it should just be water vapor.
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      02-03-2012, 11:25 PM   #12
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Its perfectly normal for cold start engine, once it warms up it should be cleared. Thats why you dont see other car having it.
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      02-06-2012, 11:58 AM   #13
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It's normal...mine does that even after warmed up
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      08-04-2012, 07:18 PM   #14
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hi,
i got a 2009 e90 325i lci which i bought a month back, i noticed the same thing tonite when i started the car after 2weeks, its raining over here in india so could it be condensation in the exhaust?

Thanks..
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      08-05-2012, 12:33 AM   #15
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Quote:
Originally Posted by insane79 View Post
hi,
i got a 2009 e90 325i lci which i bought a month back, i noticed the same thing tonite when i started the car after 2weeks, its raining over here in india so could it be condensation in the exhaust?

Thanks..
Could be... and if it's condensation, it will go away. If it persists, have it checked out. White smoke is not a good thing
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      08-05-2012, 03:32 AM   #16
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Quote:
Originally Posted by Soikiu View Post
Could be... and if it's condensation, it will go away. If it persists, have it checked out. White smoke is not a good thing
yes it did go away after i started driving the car, hope all is right..
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      02-05-2013, 04:16 PM   #17
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to the OP, do you still have white steam coming out from your exhaust? my 325i just did that agin last night.
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      02-05-2013, 08:39 PM   #18
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Hi, nope, no more excessive white vapor from the exhaust anymore.
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      02-06-2013, 03:29 AM   #19
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Quote:
Originally Posted by Soikiu View Post
Hi, nope, no more excessive white vapor from the exhaust anymore.
ok so it was nothing serious & hopefully all normal..

Last edited by insane79; 02-06-2013 at 09:46 AM.
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