Wet carpets in Touran with sunroof

[driver2008]

Vehicle in Question has a factory sunroof. Does anyone know where sunroof drains exit body, and how to gain access to them. Do they have the notorious one way rubber 'fart' whoopee cushion style valves, which block internally with roof sludge. How many drain tubes are fitted. Are they like on a Golf for instance. There is evidence of fiddling with drivers wheelarch liner on outer edge. Is there any evidence of road splash entering cabin from here. the 2 floor storage cubby holes on drivers side are damp.

[dreddfan]

Have you checked for blocked drainage ducts in the engine bay at the bottom of the windscreen? Sunroof drains usually go to the wheel arches alright.

[driver2008]

Thanks Dreddfan, engine bay scuttle drains are clear. Are there 4 drainage tubes from sunroof, and where do they exit?

[dreddfan]

If you have access to an air gun you can blast them out with compressed air. Some people use wire (bicycle brake inner cable works well) but I have a length of M4 nylon thread bar that I use for general poking purposes as its gentler on rubber tubes.
Last resort is to seal up the sunroof altogether as I did here on the wifes old Brava:

http://www.fiatforum.com/bravo-brava/307684-sunroof-guide.html

[VAG-Abound]

I've just been battling with this :(. Carpets on our 2003 Touran got very wet on the driver's side after some heavy rain while driving in late-August. Initially I thought it was an unusual set of circumstances leading to water getting in via the wheel arch somehow (we were driving in France, so maybe the spray comes from the other direction :confused: :p?).

I stripped out the cabin on that side and found that things were pretty wet. While I had it stripped out I sprayed a hosepipe from various directions but got nothing coming in around door seals, firewall, etc. Luckily September was pretty dry so it wasn't a problem. Recent rain led to another clue though, and a need to get it fixed!

After a rainy night I noticed some dampness on the vertical part of the little (quarter?) A-pillar that the door closes against on the driver's side, so I then figured it was either a windscreen or sunroof leak. I was pretty sure my hose test ruled out the windscreen, and when I looked opened the sunroof to take a look could see water sitting in the gutter around it. I tried poking strimmer line and a length of semi-stiff BT cable down the two front drain holes, but that wouldn't go all the way and didn't clear things :(.

It took a little while to figure out where those drains run to. In the end the diagram of the Touran sunroof here (http://www.partsbase.org/vw/touran-tou-eu-2003-87700-glass-sliding-roof/) and one of the closely related Golf V that I found convinced me that they come out somewhere high up on the engine bay, just under the windscreen - not running all the way to the wheel arches as some web wanderings had suggested. And they do, but are quite hard to find / clean!

The best description of where to find the valve that I can give is in the cavity under where you probably have the tax disc fixed. There is a little gap above a star screw which is securing the wiper arm linkage mechanism. To reach the LHS one I had to face forwards and use my right hand pointing backwards (imagine you're about to receive the baton in a relay race :)) to insert index and middle finger into that cavity. I could then feel the end of a rubber tube, and just flapping it around cleared it. Be a bit careful not to push it upwards as it can go through a hole in the metal and I'm not sure where it would then drain to! Once I could waggle the end on the passenger's side there was a burble and water came gushing out, so whatever the blockage was cleared easily. I could now use a houseplant watering can to pour water into the gutter and as the car was on a left hand camber it all drained freely :D.

I haven't tried it, but suspect that for those with shorter, stubbier digits a simple hooked tool made from a length of stiff wire / coat hanger that you could insert, twist towards the wing panel to hook the tube and then pull out a few times would do a similar job. Maybe even just sticking something like the handle of a wooden spoon in there would do it.

But this didn't entirely fix my problem. I thought that the blocked LHS drain had been sending water across to the drivers side - maybe via the inner roof liner to where I had seen it - but when I did my pour test on the driver's side I found that was still coming into the cabin liner quite quickly :aargh4:, so it seems I have a different problem there - maybe the tubes have become detached :mad:. Not sure if I will try just blocking that drain hole up and rely on the passenger side and rear ones to do all the draining, or think about removing upper trim to try and track it down :zx11:.

[VAG-Abound]

Couldn't let it rest, so popped the inner roof liner off and found that the hose on RHS was completely disconnected from sunroof gutter spigot. This may have happened when I enthusiastically pushed the liner back into position a few weeks ago after discovering it was the source of one of our rattles :o.

Bit tight, but just enough room to get hand in and join them back up. Water successfully making its way to both L and R wheel arches when I pour water :D.

Liner snap-on clips not easily joining back up though!

Now to strip cabin out for one last drying session. Hopefully.

[driver2008]

That's a good reply with good info. I once changed a sunroof on a Mk3 Golf and the Touran design looks similar. At each corner, was a kind of plastic collection tray, which funnels water into the spout. Each tray was masticked to the underside of the 4 main frame water collection members. I guess this could have failed, or the push on pipe has come off, or blocked internally. I took the old sunroof off a scrapper, so was prepared for reassembly to my car. Quite easy really, once youve got the headlining off, which was a bit fiddly on the mk3 Golf. Probably more difficult on the Touran, you might need a helper.