The hot weather has helped to dry out the right boot pocket of the tourer, so can now see where the water is getting in. It's weeping in around the oval vent that the sunroof drain plugs in to.
What is the best way to seal this up? There is a fair amount of mouldy crud growing on it. It looks like the bumper has to come off to remove it completely for cleaning. I've read that silicon is not such a good idea as it is corrosive to the paint/metal.
Any suggestions much appreciated - ideal time to get this sorted.
Help fixing water leak in boot
Moderator: martauto
- Brianmoooore
- E30 Zone Team Member

- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
If you're sure thats where the leak is, then the bumper will have to come off to do the job properly.
Only two bolts hold it on. Look underneath the bumper and unscrew two large female Torx bolts, then just pull the bumper backwards and off.
Needs two people to put it back easily, as it has to be slid into the guides behind the wheel arch.
Only two bolts hold it on. Look underneath the bumper and unscrew two large female Torx bolts, then just pull the bumper backwards and off.
Needs two people to put it back easily, as it has to be slid into the guides behind the wheel arch.
Brian,
Can see the damp stain running down from the bottom left of the vent. It may not be the only leak, but the most obvious at the moment.
So, once I've got it all off and cleaned up - any suggestions on what to seal it with on reassembly? Will most probably do both sides.
Thanks,
Scott
Can see the damp stain running down from the bottom left of the vent. It may not be the only leak, but the most obvious at the moment.
So, once I've got it all off and cleaned up - any suggestions on what to seal it with on reassembly? Will most probably do both sides.
Thanks,
Scott
- Brianmoooore
- E30 Zone Team Member

- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
Sure the stain isn't anti rust wax?
There should be a thin rubber gasket for the vents, IIRC, but they are not known to be a major source of water leaks.
The usual suspects are: the fixing holes for the "shark fins" behind the rearmost side windows, the gaskets around the rear lights, a leaking rear screenwasher tube where it goes along the hatch hinge, and rust holes in the wheelarches, especially the RH one with all the little non rust protected brackets.
There should be a thin rubber gasket for the vents, IIRC, but they are not known to be a major source of water leaks.
The usual suspects are: the fixing holes for the "shark fins" behind the rearmost side windows, the gaskets around the rear lights, a leaking rear screenwasher tube where it goes along the hatch hinge, and rust holes in the wheelarches, especially the RH one with all the little non rust protected brackets.
I had a leak in the boot around one of those oval panels. I removed the bumper, removed the panels and rubber gaskets and gave everything a good cleaning. I then replaced the oval panels and gaskets and used the flexible sealent used for sealing around windscreens to seal the joint between the body and the panel on the outside. So far, so good. Important to make sure you have a clean surface to put your selant on. The advantage of the sealant used for windscreens is that it never hardens, although it is a bit messy!


