Boot Leak finding

UK forum for general and technical discussion about the Z3 roadster

Moderator: Gazza

Post Reply
User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Boot Leak finding

Post by dazthephot » Mon 10 Jul, 2017 20:25

Can I buggery find this leak.

The tilt sensor well and the battery well are waterlogged again after a rain fall.
The aerial base grommet is new and there's no sign of water or moisture around there.
The third brake light is dry and the boot wiring is dry.
I've looked at all the seems and they are dry.
The boot carpet is dry
Any suggestions because I can't figure it out.


Sent from my iPhone using Tapatalk Pro

User avatar
BonBon
Joined: Tue 08 Jan, 2008 21:10
Posts: 1168

  Z3 roadster 1.9

Re: Boot Leak finding

Post by BonBon » Mon 10 Jul, 2017 21:10

The the most probable thing is the seal of the roof against the body. Remove the carpets and pour water over the rear window. My bet is that you will see water dripping inside the boot. The fix is to partially open the roof and seal the whole length of the seal with black Super7.
(The only other thing I can think of is the seal around one of your rear brake lights clusters.)

User avatar
Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 9978

  Z3 roadster 1.9
Location: Cheshire

Re: Boot Leak finding

Post by Robert T » Mon 10 Jul, 2017 22:00

If you can't see it after that, remove the carpets and sprinkle talcum powder round the inside of the boot. Any water will makes tracks in the talc and you will be able to trace where it comes in.

Cheers R.
Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
Image

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Mon 10 Jul, 2017 22:01

I have recently had the rear bumper resprayed after some **** ran into the back of the missus but I'll check out the seals thanks.


Sent from my iPhone using Tapatalk Pro

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Mon 10 Jul, 2017 22:20

Good tip on the talc thanks.


Sent from my iPhone using Tapatalk Pro

nang
Joined: Sat 25 Jun, 2016 04:27
Posts: 30

  Z3 roadster 2.8

Re: Boot Leak finding

Post by nang » Sat 15 Jul, 2017 05:37

Hop in the boot with a torch and get a mate to run a hose over it. Or put the missus in the boot and run a hose over it. :shock:
Tony.

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Sat 15 Jul, 2017 15:27

Ha good suggestion I'll put the missus in and turn the hose on, should be good for a laugh of nowt else.


Sent from my iPhone using Tapatalk Pro

peter2b
Joined: Sat 01 Nov, 2014 18:47
Posts: 928

  Z3 roadster 2.2i
Location: cheshire

Re: Boot Leak finding

Post by peter2b » Sat 15 Jul, 2017 18:51

I've just found out that the rear window n/s is leaking on the zip seam ,it drips onto the mat behind the passenger's seat then finds it's way into the boot , yours might the same
peterz3
just as well I'm getting a new soft top fitted next month

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Sat 15 Jul, 2017 20:20

Ah right thanks I'll take a look there. Are you looking at a lot of money for a full top replacement.


Sent from my iPhone using Tapatalk Pro

peter2b
Joined: Sat 01 Nov, 2014 18:47
Posts: 928

  Z3 roadster 2.2i
Location: cheshire

Re: Boot Leak finding

Post by peter2b » Sun 16 Jul, 2017 10:26

I'm using a place near Stoke as that's just up the road from where I live new top is about £650 having it done in august
I had thought of the other place down near Croydon but that's a 3-5 hr trip each way with fuel wear and tear toll fee etc
peterz3

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Fri 21 Jul, 2017 22:33




Sent from my iPhone using Tapatalk Pro

Vic-Z3
Joined: Fri 11 Jun, 2010 20:28
Posts: 915

  Z3 roadster 2.2i
Location: Redditch
Contact:

Re: Boot Leak finding

Post by Vic-Z3 » Sun 23 Jul, 2017 22:21

Start here please and get it sorted before what happened to me becomes a familiar site with these Z3's .....

viewtopic.php?f=5&t=36400&p=349616&hili ... ot#p349616

I no longer own a Z3 ..... :(
----------------- BMW Z3 Das Beste Auto -----------------

Mein altes Auto riecht nach Nudeln, hat dieses Auto eine Wurst Geruch.

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Mon 24 Jul, 2017 09:56

Oh dear ☹️


Sent from my iPhone using Tapatalk Pro

User avatar
dennisedlin
Joined: Sat 24 Oct, 2009 07:39
Posts: 140

  Z3 roadster 2.2i
Location: Nottingham

Re: Boot Leak finding

Post by dennisedlin » Tue 15 Aug, 2017 08:44

Do you park on a hill facing uphill? If so heavy rainfall will overwhelm the seal geometry and will find its way into the boot. There is no fix.....just park facing downhill and problem solved. On the flat or small slopes no problem......steep slope equals very wet boot.
Z3 2.2 Sport, everyone loves a Z3

Image

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Wed 16 Aug, 2017 10:10

Park on a flat drive. Outside unfortunately these days so the British weather rules everything.


Sent from my iPhone using Tapatalk Pro

User avatar
BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2220

  Z3 roadster 1.9

Re: Boot Leak finding

Post by BladeRunner919 » Thu 17 Aug, 2017 09:11

Did you follow the talcum powder advice?

User avatar
dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 121

  Z3 roadster 1.9i
Contact:

Re: Boot Leak finding

Post by dazthephot » Fri 18 Aug, 2017 20:50

Not so far I just haven't had a chance. Still a good plan though.


Sent from my iPhone using Tapatalk Pro

User avatar
BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
Posts: 2220

  Z3 roadster 1.9

Re: Boot Leak finding

Post by BladeRunner919 » Sat 19 Aug, 2017 18:23

It's the only practical way to find the leak and then cure it. Otherwise you're just speculating.

peter2b
Joined: Sat 01 Nov, 2014 18:47
Posts: 928

  Z3 roadster 2.2i
Location: cheshire

Re: Boot Leak finding

Post by peter2b » Fri 25 Aug, 2017 21:19

one thing I've found out is when I had the new soft top fitted today there is a U shaped gutter just under where the roof is fixed so if the seal leaks the water is taken to just over the shock top mount the through the wheel archs, I don't know if this is fitted to all z3's or just the later models, if you pull the rear shelf carpet back you can see if yours has one
peterz3

Post Reply

Who is online

Users browsing this forum: No registered users and 7 guests