sunroof drainage leaking

[sp1ke]

Hi All

I've searched around on here & YouTube, but not found anyone else that has quite the same issue. The common causes seem to be blocked drainage tubes which doesn't seem to be the case here.

So I was wondering if anyone here has come across this, or if anyone has any suggestions on the best way to fix this.

I found a couple of damp spots on the headlining in both rear corners which seem to occur after a wash or when it rains.

I peeled back the edge of the headlining & to investigate & it looks like both sides are leaking where the plastic bit coupling point for the drainage tubes joins to sunroof mechanism. It looks like it may be possible to remove this from the sunroof mechanism.

So it might be possible to apply some glue or sealant here, but I'm wary that this could obstruct flow to the tubes & cause a different issue.
Any suggestions on how best to address this gratefully received

& a bonus question - I understand the drainage tubes exit behind the rear wheels. I couldn't see anything behind the wheel arch liner above the sill. Is it the bung shown in the 3rd pic below which is in the section above the rear bumper?

cheers

 

[deMort]

I'm afraid i know more about Targa roofs than these but the drain would seem to be similar .. look over the top of the bumper support , over the silencer and theres a tube there .. on Targas thats one of the drains so i assume its the same for you .

I imagine its a case of removing the entire frame then removing the rear drain to reseal it ...

For me i would just dry it and use silicone sealant around the outside .

 

[sp1ke]

Thanks Ian

FYI I found the plastic connectors can be removed from the drainage channels by gently levering the clip on the outer edge down.

Once removed, You'll see there is a groove around the edge of the connector which is filled with the remains of some black sealant.
Possibly the 3m stuff shown in the rennlist guide for replacing the external seal around the edge of the sunroof.

I cleaned these up & replaced with some fresh sealant which should hopefully resolve the leak for another 10 plus years. If not it's a fairly easy job to remove them again to renew the sealant.

 

[sp1ke]

Just had a sustained heavy downpour here, & no sign of any water ingress

 

[deMort]

It's the same basic idea as the Targa roofs .. bathroom silicone will do the job .

Nice going on removing them though .. not something i've had the pleasure of before so ill make a note

 

[skinny_monkey]

You could seal the outside easily if it leaks again tho i reckon your fix should be a pretty permanent solution.

For the exit of the drain, it's behind that wheel arch liner. It's like a little rubber duckbill poking down. On your picture, if you follow the inside if the seam sealer down, you can see a little rubber tube behind the liner. i think it might be that?

 

[sp1ke]

Thanks for the tip skinny_monkey. The tubes are clear for now, but useful to know where I can check them, should I ever need to