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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-28-2016, 06:15 PM
G3ARHE4D G3ARHE4D is offline
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Quick Vapor Barrier question

I'm in the middle of resealling the VB's on my rear doors and have a question.. (I've needed to do this for a while but the car is usually garaged during rain and only driven once or twice a week so I put it wayyy off)

At the bottom of the door there are two holes. I assumed for draining purposes but mine have, or had, plugs in them. Should the plugs stay in place? I remember when I started having the water leakage problem many months ago (before learning of the vapor barrier ordeal) I pulled those plugs out thinking it would help with drainage.. Should I put them back? Does it matter?

Thanks in advance..
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  #2  
Old 06-28-2016, 06:23 PM
ca2014mp2 ca2014mp2 is offline
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Are you sure they are not plugs from when they added rust proofing sealant... they may be drains but I've never hear of someone going out and finding and then buying a plug to plug them up.. I'm thinking it was for rust proofing.. just a guess..
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Series E39 Vehicle code DP63 Model 528ITA Engine M52TU
Body type OTHER Catalog model USA Production date 1999 / 06
Transmission Automatic Steering Left Catalyzer YES

Production FROM : 1998/09/01 TO : 1999/08/31
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  #3  
Old 06-28-2016, 06:29 PM
rdl rdl is offline
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There are 2 narrow slots, drainage holes, on the door's bottom hem. They're almost invisible behind the rubber seal strip unless looking upward. They should be open. Actually a good practice to clean them once in a while with a toothpick or similar to ensure they're not clogged.

If you mean holes higher up the door panel, leave any plugs in place.
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  #4  
Old 06-28-2016, 06:48 PM
G3ARHE4D G3ARHE4D is offline
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Here's a picture of the holes at the bottom of the door and the plugs that were in them. They are on all 4 doors.



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  #5  
Old 06-28-2016, 07:03 PM
rdl rdl is offline
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Quote:
Originally Posted by G3ARHE4D View Post
Here's a picture of the holes at the bottom of the door and the plugs that were in them. They are on all 4 doors.

...
Definitely leave those plugs in place. They are not drain holes.
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  #6  
Old 06-28-2016, 07:15 PM
G3ARHE4D G3ARHE4D is offline
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Okay.. Any idea what they are for?
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  #7  
Old 06-28-2016, 07:47 PM
rdl rdl is offline
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Quote:
Originally Posted by G3ARHE4D View Post
Okay.. Any idea what they are for?
One can't be sure without observing assembly plant processes (which is now difficult without a time machine )

A few possibilities:

1 - locating holes to position the blank in forming dies
2 - locating holes used by door welding jigs to ensure positive location
3 - access holes for assembly aids when assembling components into door
4 - pickup holes for door lift jig: on door trim line or to carry door to car body to locate it on hinges
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  #8  
Old 06-28-2016, 09:11 PM
G3ARHE4D G3ARHE4D is offline
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Works for me, back in they go lol.
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  #9  
Old 06-29-2016, 06:55 AM
VaTechM3 VaTechM3 is offline
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What products and process are you going to use for replacing the vapor barrier? I'm in the process of messing with mine as well.
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  #10  
Old 06-29-2016, 07:25 AM
G3ARHE4D G3ARHE4D is offline
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Originally Posted by VaTechM3 View Post
What products and process are you going to use for replacing the vapor barrier? I'm in the process of messing with mine as well.
Oh I didn't buy anything, I happen to have a pretty decent heat gun (Matco) so the first thing I tried was just heating up the existing butyl tape through the VB and it worked like a charm (for now at least). Once it was all done and dry the VB wouldn't budge. Hopefully it holds up as it was extremely easy lol. Whole process took 30 mins tops..
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Old 06-29-2016, 08:16 AM
VaTechM3 VaTechM3 is offline
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Thats what I should have done to start with instead of pulling all the old stuff off and attempting to reapply new adhesive. I'll see what happens though. Hopefully your repair holds up!
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