E39 sal: Leak in sills flood rear footwell - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 10-27-2013, 03:20 PM
n00b
 
Join Date: Jan 2009
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
bluebottle is on a distinguished road
(Thread Starter)
E39 sal: Leak in sills flood rear footwell

Hello Folks, I have yet to find a conclusive answer to my problem so am about to drill holes and cover holes with sealant.

I have just bought a 2001 77k 525i SE in excellent condition; unmarked bodywork and no accidents and NO SUNROOF.

However the rear footwells were flooded. I have removed seats, centre console and carpet to dry everything out. I have removed all four door panels and resealed with butyl adhesive and tested for leaks - all OK.

As the carpet is still out I can see results of another leak. The car is parked on a slope (rear R/H side lowest), water is emanating from the spot welded channel that tranverses the floor under the front seat from the B pillar to the transmission tunnel. I have traced the source from water being poured down R/H windscreen and flowing beneath pollen cabin filter housing. It seems from here it is making its way into the R/H sill that must already be full and is overflowing into the welded channel. I cannot see any drain holes, hence my need to drill holes. Neither am I sure where the water is getting in so am going to glue polystyrene patches over all the holes on the bulkhead and seal with butyl. I am not blocking the drain holes beneath the cabin filter housing.

Does anyone have a better idea? I've had the car for a week and haven't driven her yet!

Thanks for all constructive suggestions.
bluebottle is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 10-27-2013, 06:22 PM
4DoorWhore
 
Lord Vader's Avatar
 
Join Date: Feb 2005
Location: Calgary, AB
Posts: 2,210
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Lord Vader is on a distinguished road
The roof has water channels that feed down to drains that exit out by the wheels (on my E36 their by the wheels). Its quite common for small debris to block these channels causing water backups, which can, and have caused interior flooding. This was common on some E36's, including pre 97 models having the DME compartment flooded with water.


ProjectTechnik.com - Alberta based BMW Community
See My car on Project Technik HERE!

And Follow Me on Instagram @E36M52

Founding Member of the Canyonrot Club! Paint Code #343

| OE M3 Bumper | M3 Mirrors | Max Velocity GTR Lip | Euro ZKW Projector Headlights | Jim Conforti CF CAI | UUC Motorwerks Underdrive Pulleys | 18x8 ASA AR1's | Koni Sport Springs & Shocks |
Lord Vader is offline  
#3 (permalink) Old 10-28-2013, 05:14 AM
n00b
 
Join Date: Jan 2009
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
bluebottle is on a distinguished road
(Thread Starter)
Thanks Lord Vader,

I have been out with hose again and have traced inlet to small ripples in a seam weld at rear of R/H wheelarch. These are intentional shapes created by BMW, not damage or deterioration!
More later.
bluebottle is offline  
#4 (permalink) Old 10-28-2013, 03:18 PM
n00b
 
Join Date: Jan 2009
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
bluebottle is on a distinguished road
(Thread Starter)
Final action

Please see my final action on this forum with images.

BMW: E39 rear n/s footwell wet.... : BMW 5 series Forum • BMWLand

Alternatively here is the text.

This is my conclusive action to prevent the leak in the rear footwell before refitting the carpet, centre console and seats, followed by a prayer that it works. :roll:

I have cleaned both cabin filter housings and sealed the edges with Butyl adhesive; this does not set so will allow removal of housing even though it will still be sticky.

The water is coming from the drain of the cabin filter housing and trickles down, entering the subframe-sill-rear footwell via small ripples in a seam weld at the rear of the driver's side wheelarch. These are intentional shapes created by BMW, not damage or deterioration!

I do not know the purpose of these holes/ripples, only that they are causing a flooded footwell so have sealed them with more butyl adhesive. I have also sealed the hole below these that supports the washer fluid bottle. I soaked the windscreen and roof with a hose and only a very small drip appeared in the car. :?

Next I heated the seam weld in the car to remove the remaining water

and then promptly sealed the seam with more butyl.

Tested again with a hose, before protecting the sealant from the carpet foam with aluminium foil.

The car is back together now. The car has been parked on a slope with the rear R/H being the lowest point as the battery has been removed to allow safe removal of the seats and door panels. I expect a similar leak to appear on the L/H side should the car be parked on a L/H slope. In the near future I will remove the L/H side wheelarch and search for similar holes that I will also seal-up. I will inspect carpets in a fortnight and hope that everything worked............

Any comments welcome.
bluebottle is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Help E39 Power Steering Leak rdeleon1 5-Series (E12,E28, E34, E39, E60) 2 09-21-2012 10:16 PM
E34 sal. manual. cooling system leak powerfulheart 5-Series (E12,E28, E34, E39, E60) 3 10-12-2009 06:59 AM
E39 oil leak. mikkey9289 5-Series (E12,E28, E34, E39, E60) 2 09-01-2009 11:18 PM
fs: e39 rear headrest, rubber floor mats and rear arm rest kman OEM Parts 2 01-07-2008 11:30 PM
Rear main seal leak '93 325is VideoBear 3-Series (E36) 2 06-10-2004 01:36 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome