UK forum for general and technical discussion about the Z3 roadster

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Joined: Tue 24 Nov, 2015 12:10
Posts: 10

  Z3 roadster 1.9
Location: Drumclog, Strathaven


Post by l3ggy » Wed 30 Dec, 2015 11:05

Ok so after the rain over the last few hours it looks like my roof in the main is pretty water tight. I do have some rain drops on the drivers seat which appear to be getting in between the drivers top edge of the window and the roof seal. Any known fixes for this, other than roof replacement? Seal replacement?

Thinking roof replacement........


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Joined: Sun 21 Mar, 2010 19:29
Posts: 552

  Z3 roadster 2.0
Location: Lymm

Re: Water....

Post by ('_')Z3 » Wed 30 Dec, 2015 11:30

Type in gummi pflege in to the search at the top and you'll find a series of problems similar to yours :( this stuff softens the hardened rubber making it more supple and better able to withstand the water by giving it a better seal.

Joined: Sat 01 Nov, 2014 18:47
Posts: 963

  Z3 roadster 2.2i
Location: cheshire

Re: Water....

Post by peter2b » Wed 30 Dec, 2015 11:30

Hard top or soft roof?

Joined: Sat 19 Nov, 2011 18:35
Posts: 2126

  Z3 roadster 1.9

Re: Water....

Post by Del » Wed 30 Dec, 2015 12:05

In my view, most likely to be the "plugs" at the top of the window pillars - the rain has a tendency to dribble along the top and "appear" to be coming in the side.

http://www.zroadster.net/forum/viewtopi ... 12#p345112

Joined: Sun 11 Oct, 2015 09:24
Posts: 61

  Z3 roadster 2.8

Re: Water....

Post by srichards » Thu 31 Dec, 2015 10:23

Worth looking in the boot under the battery as well. I thought mine was ok until I found I had a swimming pool in there. Rest of the boot was dry so I had no idea. I gave the roof a good soaking with hood treatment. Next stop is the seal around the rear light.

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Joined: Tue 08 Jan, 2008 21:10
Posts: 1184

  Z3 roadster 1.9

Re: Water.... leak over window

Post by BonBon » Fri 01 Jan, 2016 10:52

If it's just a few drops the best solution is to take some Hydrophobic spray - usually used for waterproofing fabric (eg clothing, tents or roofs). Spray into the can cover and with your finger spread some on the top of your window and on the rubber seal of the roof. (The small gap is now hydrophilic and sucks in the water droplets).

Joined: Mon 04 Jan, 2016 17:29
Posts: 4

  Z3 roadster 2.8

Re: Water....

Post by stahlgrau_hants » Tue 05 Jan, 2016 20:20

I had terrible water ingress problems, with puddles of water sitting on the leather seats after nights sat outside in the rain. Evidently the leather seats are good given the amount of water they held!

The problem, as already mentioned, is rubber bungs at the top corners of the windscreen. Rain water entered drainage channels along the top of the windscreen, but rather than running down inside the seals down the sides of the windscreen the water leaked through the bungs and into the cabin. The fix? I took out the rubber bungs, gave them and the holes a good clean and dry, applied black (gun-applied) gasket and reinserted the bungs, effectively sealing the bungs to the rubber seals, and smoothed gasket over the top of the bungs for extra measure. Problem solved perfectly.

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