Suck Fumes from outside

muhanda1 · 08-19-2014, 11:14 PM

Model 320d 2010
Car is 3 yrs old now.
Every time when I turn the heating or cooling on it sucks fumes from outside.
Doesn't matter what I select from the little push button on the dash with 2 green lights above it. I had this problem since bought the car brand new. Took the car to 2 Dealers under warranty and they said there is no problem with it. Now I had enough of it. Is there anyone experienced the same problem or similar. Could someone please give me some ideas where to start.
Thanks

196806 · 08-20-2014, 07:11 AM

Common. You might have minor oil leak somewhere. It only happens to mine when I've got an oil leak to fix - unless you have a serious leak oil with normally burn off resulting in the fumes coming into the car unless you drive with the air recirculating.

muhanda1 · 08-21-2014, 01:59 AM

I can smell it only when the fan is running (ie cooling or heating on) and the front vehicle is smokey. It's definitely coming from out side irrespective of whether the air is re-circulating or not.

Scotty89 · 08-21-2014, 08:10 AM

Yes, I think what he's saying is that unless you've got a serious oil leak, the fumes are just residual oil burning up.

If it's just oil burning up, the smell should go away after it's burned up the residue, unless it's constantly leaking and feeding the fumes into the cabin.

Have you tried searching for oil leaks in the engine bay?
The cabin air filter is under the cowl at the top rear of the engine bay, so any hot oil fumes will end up going through it and coming into your cabin. Once it's in there, recirculate will only cycle it around and around.

muhanda1 · 08-25-2014, 05:59 PM

There are no oil leaks. I have a feeling one of the vents not closing properly so it sucks outside air through the defective vent. I do not where to start?http://www.e90post.com/forums/images...es/mad0259.gif

JinAM · 08-25-2014, 10:05 PM

It's most likely one of the flap in the air/con box isn't working properly. Go to a better dealer, if you are still under warranty. Easy way to show them the fault is turn on full recirculate with fan on, spray fragrance around the microfilter housing and see if you can smell it inside.

08-19-2014, 11:14 PM	#1
muhanda1 Enlisted Member 3 Rep 49 Posts Drives: 2010 320d E90 MY10 Join Date: Dec 2012 Location: Australia iTrader: (0)	Suck Fumes from outside Model 320d 2010 Car is 3 yrs old now. Every time when I turn the heating or cooling on it sucks fumes from outside. Doesn't matter what I select from the little push button on the dash with 2 green lights above it. I had this problem since bought the car brand new. Took the car to 2 Dealers under warranty and they said there is no problem with it. Now I had enough of it. Is there anyone experienced the same problem or similar. Could someone please give me some ideas where to start. Thanks
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08-20-2014, 07:11 AM	#2
196806 Private First Class 7 Rep 120 Posts Drives: Silver 320i E90 6MT Join Date: Oct 2013 Location: Sydney iTrader: (0)	Common. You might have minor oil leak somewhere. It only happens to mine when I've got an oil leak to fix - unless you have a serious leak oil with normally burn off resulting in the fumes coming into the car unless you drive with the air recirculating.
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08-21-2014, 01:59 AM	#3
muhanda1 Enlisted Member 3 Rep 49 Posts Drives: 2010 320d E90 MY10 Join Date: Dec 2012 Location: Australia iTrader: (0)	I can smell it only when the fan is running (ie cooling or heating on) and the front vehicle is smokey. It's definitely coming from out side irrespective of whether the air is re-circulating or not.
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08-21-2014, 08:10 AM	#4
Scotty89 Buy a 335 they said... It'll be fun they said... 117 Rep 995 Posts Drives: 2007 E92 335i Join Date: Jun 2014 Location: Melbourne, Australia iTrader: (0) Garage List 2007 BMW 335i [10.00]	Yes, I think what he's saying is that unless you've got a serious oil leak, the fumes are just residual oil burning up. If it's just oil burning up, the smell should go away after it's burned up the residue, unless it's constantly leaking and feeding the fumes into the cabin. Have you tried searching for oil leaks in the engine bay? The cabin air filter is under the cowl at the top rear of the engine bay, so any hot oil fumes will end up going through it and coming into your cabin. Once it's in there, recirculate will only cycle it around and around.
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08-25-2014, 05:59 PM	#5
muhanda1 Enlisted Member 3 Rep 49 Posts Drives: 2010 320d E90 MY10 Join Date: Dec 2012 Location: Australia iTrader: (0)	There are no oil leaks. I have a feeling one of the vents not closing properly so it sucks outside air through the defective vent. I do not where to start?http://www.e90post.com/forums/images...es/mad0259.gif
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08-25-2014, 10:05 PM	#6
JinAM Private 11 Rep 87 Posts Drives: 335i Join Date: Nov 2013 Location: Melbourne iTrader: (0)	It's most likely one of the flap in the air/con box isn't working properly. Go to a better dealer, if you are still under warranty. Easy way to show them the fault is turn on full recirculate with fan on, spray fragrance around the microfilter housing and see if you can smell it inside.
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