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  #1  
Old 04-19-2020, 12:03 PM
MonaLisa MonaLisa is offline
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Roof drain holes - water outlet valve

So - how many folks have just removed the rubber grommet thing at the bottom of the drain hose and left it off? I know it's supposed to block bugs and stuff, but it seems that it causes more problems than it solves. Has anyone had a problem stemming from these things not being there?

Thanks
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  #2  
Old 04-19-2020, 03:32 PM
wifesauto wifesauto is offline
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removed them on my wifes car 3 years or so ago.....after our 3rd top motor .....no ill effects
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Old 04-20-2020, 04:36 AM
RJ237 RJ237 is offline
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I cut the bottom out of mine. But for those who store the car over the winter, I'd be concerned about mice building a nest in the pocket.
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  #4  
Old 04-20-2020, 06:39 PM
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dc_wright dc_wright is offline
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I've had mine out for 4-5 years with no issues.

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Originally Posted by RJ237 View Post
I cut the bottom out of mine. But for those who store the car over the winter, I'd be concerned about mice building a nest in the pocket.
The ID of the drain hose is less than 1/2". They'd have to be micro-mice to get up into the interior through the drain, even with the valve completely removed.
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Old 04-27-2020, 01:05 AM
Rob2m Rob2m is offline
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Mine are out. I think they are more relevant for insects which doesn't really apply in the Uk.
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Old 05-08-2020, 07:11 AM
RDAN RDAN is offline
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So I am a little ignorant as to the location. I have had no issues yet on my 2006 z4 3.0si but after reading this I want to remove. Can someone help me out? Thanks
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Old 05-08-2020, 01:09 PM
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Clearancediver Clearancediver is offline
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They are in front of the mud flaps. There is room enough to stick your hand up the void/opening to remove them... if your hands are small enough....and you are flexible enough.

It’s a little easier if you jack up the car on each side to do so...


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Old 05-08-2020, 02:08 PM
RDAN RDAN is offline
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Thanks I will try this tommorow.
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Old 05-22-2020, 02:38 AM
yyz_bobby yyz_bobby is offline
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I cleaned out my drain holes recently, broke one of the grommets on driver side.

Noticed the road noise straight away and had a member send me a spare. Put both mine back in. Probably one of the rare instances someone does so.

I think getting the car up twice a year to check and clear out any dirt buildup is good enough.
Moving the motor is on the list of things to do so that will not bother me so much if they did get blocked again in future.
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Old 05-22-2020, 06:07 AM
RDAN RDAN is offline
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Thanks, I never got back clear or remove them. Move the motor? How does this work?
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Old 05-22-2020, 06:45 AM
yyz_bobby yyz_bobby is offline
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Quote:
Originally Posted by RDAN View Post
Thanks, I never got back clear or remove them. Move the motor? How does this work?

one of the most spoken about subjects. search threads and google lots of info. Not easy.
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Old 05-22-2020, 08:42 AM
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Clearancediver Clearancediver is offline
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Trying to wrap my head around you hearing road noise when you removed your drain plugs. If anything, the removal would create a slight vacuum in the drain line... and given its diameter the chances of it transmitting “noise” would be minimal if my supposition is wrong. If anything I would expect a whistling or slight suction noise.

I noticed absolutely no difference when I did mine.


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  #13  
Old 05-22-2020, 09:45 AM
wifesauto wifesauto is offline
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Quote:
Originally Posted by Clearancediver View Post
Trying to wrap my head around you hearing road noise when you removed your drain plugs. If anything, the removal would create a slight vacuum in the drain line... and given its diameter the chances of it transmitting “noise” would be minimal if my supposition is wrong. If anything I would expect a whistling or slight suction noise.

I noticed absolutely no difference when I did mine.


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me too
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Old 05-22-2020, 09:46 AM
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Quote:
Originally Posted by Clearancediver View Post
Trying to wrap my head around you hearing road noise when you removed your drain plugs. If anything, the removal would create a slight vacuum in the drain line... and given its diameter the chances of it transmitting “noise” would be minimal if my supposition is wrong. If anything I would expect a whistling or slight suction noise.

I noticed absolutely no difference when I did mine.


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Same here. Absolutely no discernible difference when I took the valves out. First time I've heard of anyone else noticing a difference either.
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Last edited by dc_wright; 05-22-2020 at 09:48 AM.
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  #15  
Old 05-23-2020, 02:18 AM
yyz_bobby yyz_bobby is offline
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Quote:
Originally Posted by Clearancediver View Post
Trying to wrap my head around you hearing road noise when you removed your drain plugs. If anything, the removal would create a slight vacuum in the drain line... and given its diameter the chances of it transmitting “noise” would be minimal if my supposition is wrong. If anything I would expect a whistling or slight suction noise.

I noticed absolutely no difference when I did mine.


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I wear a hearing aid in my right ear so maybe its because the receiver is faced that way, either way you're boring me with your geek level x1000 response.
Each to their own i say
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Old 05-23-2020, 04:56 AM
wifesauto wifesauto is offline
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Quote:
Originally Posted by yyz_bobby View Post
I wear a hearing aid in my right ear so maybe its because the receiver is faced that way, either way you're boring me with your geek level x1000 response.
Each to their own i say
well maybe you did not hear.........that geek is pretty knowledgeable and helpful on this forum
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  #17  
Old 05-23-2020, 05:00 AM
Rob2m Rob2m is offline
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Quote:
Originally Posted by yyz_bobby View Post
I wear a hearing aid in my right ear so maybe its because the receiver is faced that way, either way you're boring me with your geek level x1000 response.
Each to their own i say
I'm guessing the left ear couldn't pick up on that side then!
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