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Old 04-20-2011, 01:45 PM   #1
charlesrock
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Normal for hood to have abit of smoke when raining?

Hey,

Just noticed that when I parked my car while it was raining (after driving for a few KM's) there was smoke. The weather isnt that cold either.

Just wondering would the car smoke because of the rain touching the hot hood? (sort of when your going through a car wash)

Stupid question I bet, but just asking.

Thanks!
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Old 04-20-2011, 01:51 PM   #2
xavi330i
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Quote:
Originally Posted by charlesrock View Post
Hey,

Just noticed that when I parked my car while it was raining (after driving for a few KM's) there was smoke. The weather isnt that cold either.

Just wondering would the car smoke because of the rain touching the hot hood? (sort of when your going through a car wash)

Stupid question I bet, but just asking.

Thanks!

Im guessing it is still cold up there. Water and huge temp differences may cause a steam affect.
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Old 04-20-2011, 01:53 PM   #3
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I have never experience this. Then again I don't live in your climate. Sure it's smoke and not steam? And if steam could it be the radiator? I'd pop the hood next time and see what going on underneath.
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Old 04-20-2011, 01:55 PM   #4
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I actually drove home after and popped the hood but nothing. I put a light to see if I see any type of leaks that may cause this, I dont really see anything but under the actual engine I can see moisture but it could be from the rain and all. Yea it looked like steam (very light mist)

And it was probably misting for a good 20-30 mins because I was inside the building for that long before coming out and noticing it.
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Old 04-20-2011, 01:57 PM   #5
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interesting, does you hood still have the protective underhood padding/insulation?
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Old 04-20-2011, 01:58 PM   #6
charlesrock
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yea it does have the padding on it. its a 2003 325i
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Old 04-20-2011, 02:01 PM   #7
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Normal. Steam off the hood or hood center is fine. Steam coming from under the hood (between the hood gaps) is not.

Its a form of steam fog. The hood is cool until youre parked. The hood begins to warm from sitting. The moisture on the hood begins to evaporate into steam from the now warm hood.
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Old 04-20-2011, 03:47 PM   #8
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I live in markham (just north of Toronto). It's steam, I had the same thing today. Drove down the highway for about ten minutes and it was steaming afterwards. No big deal happens to me all the time, with black hood and light mist of water it happens because with the tiny drops they evaporate easily.
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Old 04-20-2011, 04:03 PM   #9
sizzzurp
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Old 04-20-2011, 04:04 PM   #10
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Yup I seen this before. It is normal.
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Old 04-20-2011, 04:07 PM   #11
BimmersGarage
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Fairly normal.
Our motors generate a good amount of heat.
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Old 04-20-2011, 05:41 PM   #12
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normal

Quote:
Originally Posted by OrientBlau View Post
Normal. Steam off the hood or hood center is fine. Steam coming from under the hood (between the hood gaps) is not.

Its a form of steam fog. The hood is cool until youre parked. The hood begins to warm from sitting. The moisture on the hood begins to evaporate into steam from the now warm hood.
this
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Old 01-17-2017, 09:16 PM   #13
Msiddique217
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Hi

I live in vancouver and this has happened to me when it was snowing and today when it is raining really hard but it rains here often yet i have only seen it twice?? Can anybody elaborate.

Thanks in advance
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Old 01-17-2017, 09:24 PM   #14
E46Envyy
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Originally Posted by Msiddique217 View Post
Hi

I live in vancouver and this has happened to me when it was snowing and today when it is raining really hard but it rains here often yet i have only seen it twice?? Can anybody elaborate.

Thanks in advance
after the car is parked the hood becomes warm/hot due to the hot engine(usually the hood is air cooled). If there is water on the hood then this begins to steam off. usually occurs for 10min after turning the car off. I've had this happen a lot and is completely normal.

Cheers, Lachlan
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