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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 07-24-2013, 06:24 AM   #1
DMahoney
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Need help without car for when it rains

2201 325ci (coupe).

My problem is thAt when it rains, the windows fog up like crazy. I can't put my windows down because the rain likes to come in on the car on an e46 more than any other car I've been in lol..

Anyone ever custom make rain guards for the coupe? Or know of anyone? They aren't on the market because there's no actual "door frame. Just the door; as most of you already know.


I'd like to leave windows down sometimes when it rains not only for the fog but also because the defroster gets a little warm & sweaty.


I need help with this :/ Any help or ideads would be greatly appreciated. Thanks


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Old 07-24-2013, 06:32 AM   #2
Leezy321
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Need help without car for when it rains

My car fogs up a lot too. I just turn on my a/c and it goes away. You could also try that rain x anti fog stuff. Works pretty good.


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Old 07-24-2013, 08:46 AM   #3
DMahoney
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Need help without car for when it rains

True.. If I open the window a smallesttttt crack the rain pours in... That's what sucks too


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Old 07-24-2013, 08:47 AM   #4
DMahoney
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Need help without car for when it rains

Was trying to think & see if I can hand make some type of rain guard and adhesive it to below the roof line


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Old 07-24-2013, 08:47 AM   #5
stevenluczynski
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Turn your A/C on, if its broken fix it.
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Old 07-24-2013, 01:18 PM   #6
HLG600
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A/C on, try not to go too far off the ambient temperature and set the blower direction to include both the front and the dash. This car does fog up more than others I've owned/driven.
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Old 07-24-2013, 01:36 PM   #7
Solidjake
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Need help without car for when it rains

^ yup e46's do fog up a lot.

OP just turn on the a/c


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Old 07-24-2013, 01:43 PM   #8
jdstrickland
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Quote:
Originally Posted by DMahoney View Post
2201 325ci (coupe).

My problem is thAt when it rains, the windows fog up like crazy. I can't put my windows down because the rain likes to come in on the car on an e46 more than any other car I've been in lol..

Anyone ever custom make rain guards for the coupe? Or know of anyone? They aren't on the market because there's no actual "door frame. Just the door; as most of you already know.


I'd like to leave windows down sometimes when it rains not only for the fog but also because the defroster gets a little warm & sweaty.


I need help with this :/ Any help or ideads would be greatly appreciated. Thanks


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Turn the ventilation system on and never ever under any circumstance turn it off.

If you have windows fogging up, then you have stagnant air in the cabin. The more stagnant that it is, the greater the fog.

You can fight the moisture on the inside by setting the AC on. Air conditioning is a dehumidifier, and the fog is humidity. At first, wet the airflow to the defrost vents so there is lots of dehumidified air on the windshield, once the windshield clears, then you can set the air to blow out where ever you want, but keep the AC on. You can run the heater up a little if the AC is too cold.
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Old 07-24-2013, 01:45 PM   #9
jdstrickland
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You can set the temperature separately from the vent selection, so it is false to say that the defroster is toasty, the defroster can be as cold as the dash vents if you set the controls properly.
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Old 07-24-2013, 02:29 PM   #10
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Do the windows fog up when the car sits?

You may have an water leak in the interior as well?
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Old 07-24-2013, 02:49 PM   #11
Beamin-Bajaj
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Lol I thought i was alone with this car fogging up with the rain...putting the a/c on and dealing with it for 2 years strong
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Old 07-24-2013, 03:28 PM   #12
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For the 4/5 door owners, rear door vapor barriers leak ALL the time and add additional moisture in the car that can be an issue when it rains.

Sunroof drain and cowl leaks are also common.

Need to first make sure there is no excess moisture getting into the car, this will just make it worse when it rains for foggy windows.
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Old 07-24-2013, 04:26 PM   #13
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Basically you just need moving air over the surface of the windows. Or you can heat the glass. Turn your AC on. With wipers on, I'm pretty sure our cars automatically turn the windshield vents on.
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Old 07-24-2013, 08:04 PM   #14
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Turn the ventilation system on and never ever under any circumstance turn it off.
Unless you have the top down.
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Old 07-24-2013, 08:46 PM   #15
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Unless you have the top down.
???

My fan has been on low for 8 years, unless my math is wrong, then it's been 9 years, and ignores the times it has been higher than low. I never ever under any circumstance for any reason turn the fan to off. Not ever. Even with the top down.
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Old 07-24-2013, 08:48 PM   #16
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???

My fan has been on low for 8 years, unless my math is wrong, then it's been 9 years, and ignores the times it has been higher than low. I never ever under any circumstance for any reason turn the fan to off. Not ever. Even with the top down.
why?
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Old 07-24-2013, 09:12 PM   #17
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???

My fan has been on low for 8 years, unless my math is wrong, then it's been 9 years, and ignores the times it has been higher than low. I never ever under any circumstance for any reason turn the fan to off. Not ever. Even with the top down.
Whenever I put the top down, I turn the fan off. What's the point of trying to condition the world from your car? If the top is up, the HVAC system is on Auto.
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Old 07-25-2013, 11:00 AM   #18
daki_bmw
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why?
Turning it completly off closes all the open flaps. Turning it on next time opens flaps again.* I don't want/need to do that to my 5 or so electric motors for flaps. If I need particular flap opened/closed, I do it manually. But air flow is so low (power usage also) at the lowest setting, that shutting it off puts unneeded "strain" to my 12yo electro-mechanic flap system, which can crap on me anytime.

*At least that's how my HVAC is programmed to operate.
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Old 07-25-2013, 11:36 AM   #19
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Old 07-25-2013, 12:56 PM   #20
jdstrickland
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why?
Why not? I hate a stuffy car.

If I got into your car and the fan was off, I would turn it on just to have moving air in the cabin. Just a habit I suppose, but one I insist on maintaining. Perhaps I'm overly anal about this, but I was overjoyed, seriously, in the late '70s to early '80s when they made the ventilation system fan remain on at all times. I don't know what changed to have the car makers put an OFF selection back into the life support systems, but I can clearly remember driving cars that the fan could not be set to off.
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