Yea unbelievable Singh how much crap gets built up in those areas.


regards
Drag

 

Hi Drag,
Would be better to reach in from where the fuse box is under the bonnet.
Any instructions on how to remove it? I am assuming some wiring would have to be disconnected...
There needs to be a mesh to keep leaves out

 

The other place you need to check while the wheel housing liner is out at the rear bottom of the wheel arch. There is an area that will fill up with mud, sand and other stuff. I cleaned about 0.5 kg of mud and sand from that area.

Would be a great place for corrosion to start.

 

Thanks, will check this out too. I removed the liner without taking the wheel off but should be able to spot n clean

 

That's pretty nasty, thanks for adding another task to my cleanup list

 

Hi Singh,

Great photos.

Did you clean the sun roof drains or the windscreen drains? I have cleaned both drains under the wheel arches, tested with water in on the windscreen but still water does not drain correctly from my sunroof front drains.

I'm trying to find the best way to access the bottom of these drains as wire/ cable wont make it all the way through.

I have a 2007 V10 and am currently dealing with major electrical issues due to water ingress from the sunroof so I have start at the top and work my way down!

Stupid sexy V10!

 

The sunroof drain, which appears to be your problem Paul, starts from the front side end of the sunroof, the drain pipe runs inside the A pillar and ends in the wheel arch behind plastic liner.
I used a wire to push down from the top, but goes only as far as the bend at the bottom of A pillar. Pull out the cover for the fuse box and you can see the joint and disconnect there- pour water here into the opened joint and it should gush out.
If not then remove line from wheel arch and clean it all up. Need long fingers or a tool to stick in that hole- theres a tub there that holds all the crap.
Otherwise you could have an issue up in the sunroof tray

 

Nice pics.

I have to mention I tried getting to the pipe at the bottom of the A pillar (water was just sitting in the drain) on the passenger side here in Europe with no success.

I started to dig and managed to get the lid under the glovebox off, the A pillar cover, some plastic with a vent hole on the side of the dashboard and some other small bits. I had to take it to my mechanic and he said he had to take the ABS pump off.

Would be really appreciate it if you post some pictures when you will check the driver's side.

 

Lovely photos. Mine gets like that after coming back from the mountains and campsites. People wonder why their vehicle's floor and A/C drains tend to get wet after a season, or two. Well, check those drains like you check the oil.

 

Good job guys. It is good if everybody is aware of this potential problem, especially if water gets on the electrics.

I also check the sunroof drains and plenum chamber drains. I have a 2011 and the plenum area is slightly different. The is no rubber 1 way grommet fitted and the drain hole is larger than the older Touaregs. The drains in the sunroof has 2 forward (drains into the plenum) and the rear 2 drains run down the C pillars.
The plenum area is fairly difficult to get to.
1) You have to remove the windscreen wipers
2) remove rubber strip at the firewall
3) remove plastic cover at bottom of windscreen
4) remove relay cover
5) remove relay plate
6) remove relay housing
that gives you access to plenum area.

1) jack up front and remove front wheels
2) remove inner wheel well liners

I used a length of weed strimmer plastic wire and inserted in the drain holes in the corners of the sunroof and fed it down as far as it would go.
Inserted the same wire from the plenum area sunroof drain and fed it up the way towards the sun roof.
I then used a small hose from the top at sunroof and flushed with water.
when the water made it all the way down, I knew it was clear and then moved onto the next drain and did the same.
Washed out the plenum area as best as I could.
This also helped in getting rid if any salt / grime left over from winter.

I usually check this are once a year.

REMEMBER: don't use compressed air to blow out sunroof drains unless it is at a very low pressure. If there is a blockage and high pressure is used, then there is a chance that the drain pipe might pop off the internal port and then it will be very, very, difficult to reconnect.

I have a few pics of what I done and will post it once I get back home. Maybe this will assist anybody else in keeping that area clean. Or have an idea how the dealer should do it.

 

On the T1 there are 4 male connectors for the drain hose in the sunroof frame, one in each corner similar to what you indicate. The drain hose female connector to the skylight frame will leak over time and the water follows the hose down the pillar adjacent to airbag and will stain the roof liner and wet the footwell. Over time the sealant just fails. I ended up using gorilla glue on on all 4 connectors. Thought the water was due to blockage but ended up being the drain hose connector. I had one fail on drivers side and rear one leak on passenger side.

 

Sunroof drains

Hi again guys,
pictures as per my last bit of info

 

Hello Singh, good pictures!

I need to do this on my T2. Unfortunatly, I wasn't able to understand which is the part belonging to the 3rd picture (that one with a lot of water). Can you help me to undertand?.

Thanks!
Eric.

 

Hi Eric,
Yes, the third picture is of all the leaves and mud collected in a bucket, some comes out as you pour water but a lot of it has to be wigglled out from that small hole.
Be patient, I spent 20 mins pouring water from the top and pulling down leaves with my fingers and a bent hanger....it keeps coming out

 

^^I will bet the third picture is the bucket that he collected the run off in, after he pulled the plug out of the bottom of the cowl.

The fifth picture is the same bucket, after he poured the liquid out and allowed the debris a little time to dry.

 

good work singh, drain pipe joint right next to the fuse box is a bit scary...

Will put this on the list of things to do.

 

G'day Ragman, it is close. When the drain is blocked, usually further down i think the sunroof tray overflows rather than at this joint, and sends water trickling down into the footwell after soaking the roof liner

 

On my 2015 rline with panoramic roof i see the rear drain outlets down below are similar to my t1 v10- i do hope the drains are bigger though

 

I recently started having issues with my T1 sunroof leaking. How do I go about draining these ?

 

Check to see where the leak is first. You may have a clog in the first half segment of the pipe, or the latter. Commonly, the first half segment between the sunroof like mine due to dirt and small flowering deposits from the larger trees we parked under. Suggestion:

Retract your sunroof glass completely. While you're at it, take a bit of time to clean and grease the rail.

Take a look around the drainage holes at the top. See if there's any thing clogging them. They locate to the left and right of the rails. You can't miss them. See how much initial deposits are. It will tell you how much cleaning you may need.

Take a 24oz cup of warm water, and pour along the areas of the drainage. See if the water drains down fast or so. Fast flow means you're good. Slow and ponding means you have a nice clog somewhere. By pouring down warm water, you're creating a nice compaction and seal, readying for the next step.

Get a fuzzy stick, or firm soft stick to see if you can remove the clog at the top. Commonly, it's stuffed and crusted at the 6 inches and shallower. If there's nothing, time to take out the compressed air. Reduce the pressure down to 40psi first. High pressure will blow a nice hole along the drainage path. Seal the opening using a grommet or plastic wrap around the air spray nozzle. You may need a second person to check the drainage of the rear driverside bumper.

Test again to see if the water drains through. If not, increase air pressure to 60psi, and continue for the next 2 to 3 minutes. Test again.

Don't let the surge of air exceed 95psi. Learned it from experience.

By this time, it should be nice and clear. If not, the next thing to do is a nice 30psi to 40psi water blasting. Same method as the air compressor, but through a common water hose. Finding the attachment to reduce the hole size down can be a bit of a challenge. I got mine at the local boxstore (Lowes) for $2.

 

Remove wheel liners, then the drain plug, reach inside the hole to extract the crap that’s blocking

 

Do you need to remove the wheel to get the wheel liner out. I just need to inspect the drain valve. Don’t have a problem yet.

 

Let me add a story that will help convince everyone to go do this NOW!!!

I knew mine were clogged and while doing a repair to the air ride sensor I cleaned out the passenger side drain. Forgot to do the driver's side. A year later and we've been getting a LOT of rain. I knew there was some moisture in the car because on a hot day the windows would fog up on the inside. Yesterday I got the BRAKE FAULT STOP CAR error. Forum posts said to check and see if there was moisture under the carpet on the driver's side. Well I have Weathertech mats so you can't tell what the carpet is doing - but when I took the WT map out I could tell that the carpet was SOPPING WET! After two days of mopping water out of the car and having to repair some corroded wires, I'm finally driving again. The soundproofing under the carpet is like a sponge and it held about 3 gallons of water (no exaggeration).

I WISH I HAD CLEANED MY DRAINS LAST YEAR WHEN I HAD THE CHANCE!!!!!!
GO DO IT NOW!!

 

I bought a 2008 for mydaughter about a year ago and it started leaking like crazy around thesunroof a few months ago so I parked it in the garage until I couldfigure out what the issue was. The rear hatch area had about a gallon ortwo of water in it! The headliner around the front overhead controls area wasdamp also. I went through several topics and started by removing the rubberdrains and cleaning out the front plenums in each wheel well (full of crud). I then tried to flush the sunroofdrains. The front passenger side flowed well but the driver's side wasplugged so I tried to use weed eater line to find the plug. I went throughthe passenger side first (starting at the sunroof) to see how much line itwould take and then tried the driver's side. Both took ~42-45" but Idid not find the plugged area. I also tried to flush out the rear drainsand they flowed well, but water was running down the inside of the headlinertowards the rear of the car. I am unsure if this was due to the front drainbeing blocked or not. At any rate, I ended up using ~35 psi of air to unplug thefront driver’s side drain and it flows well now. I also used low pressure air to verify the front passengerdrain was unblocked.


My questions is howcan I find the rear drain inlets at the sunroof? I cannot see them and would like to blow airthrough them to double check them. Ilocated the outlets and tried to use the weed eater line there as well, bothsides took ~73” but I never saw the line come out into the sunroof area. Are these visible? Thanks in advance!

 

My apologies for the spacing errors, I typed the message in MS Word and copied/pasted it here...some of the formatting was lost somehow?!!?

 

Hi all,

Just had the "dripping water from compass/reading light" situation happen a couple days ago while driving through a good amount of rain.

Read all the posts here and wanted to chime in on my observations and technique to fix:

1. Located sunroof drain holes in the front corners of the sunroof, pretty straight forward here
2. Poured hot water and dish soap down the holes to check for backing up water. I think it took about 28oz before it started to back up.
3. Took weed whacker line and pushed it down into the holes, it stoped at around 40 or so inches
4. Took a 2ft piece of tube with electrical tape wrapped around it (to form a seal) and shoved it down in each hole at around 35psi. I could hear it spattering somewhere in the bulkhead. However, water was only sort of dripping down on the drivers side.
5. I positioned the front wheel on the passenger side all the way to the left, which gave me ample room to remove the screws necessary to gently bend back the wheel liner to get at the underside drain grommet for the bulkhead/cowl compartment.
6. I reached in, pulled out the rubber grommet and then pulled out a mess of debri with a finger.
7. I performed the same operation on the drivers side.
8. More warm water and dish soap and now the water drains so fast at the sunroof that it forms a gulping suction sound!

So, the reason my sunroof was leaking was as follows. As debri, leaves, needles, who knows what else makes its way down the vents in front/below the windshield, it clogs the collection reservoir drain grommets on the drivers/passenger side. Being that the sunroof drains both drain to this same area, and most importantly are below the overflow point, if the cowl collection reservoir is backing up with water, it soon begins to cover the sunroof drain hole which then begins to back up the sunroof drain.

Hope this helps.

-s

 

Hate to resurrect an old post but I’m flummoxed. I pulled the wheel well liner and the duckbill for the cowl drain is obvious enough, but where is the front sunroof drain outlet? I can’t see anything that looks like one, and the photos that head this post don’t seem to show the outlet either. Thanks, Z

 

The sunroof drain ends up in this cowl to which the duckbill is attached.
Pull this off and clear it all in there.
You can also disconnect the hose coming down the A pillar and use a flexible wire or compressed air or water to ensure its all clear from there

 

Someone can make a list with all the drains which needs to be cleaned for a 7P? I just cleaned the sunroof drains with compressed air. Found just 2 holes in the front end of the sunroof, left and right. I wasnt aware that there are other drains
Thank you!

 

I was looking at some pictures (see the attached picture) of the entire length of the sunroof drain, specially the piece that is after the 90deg elbow. I don’t think the sunroof drain opens up in the fish bowl as the connection is too long, me thinks it opens up somewhere in the wheel well. Any thoughts?

 

no it doesnt. I'll look up the manual to see if it shows anything

 

Any luck?

 

Thanks

 

Does this help?

4.46 Sliding sunroof drains at front: check for blockage, clean if necessary
Open sliding sunroof completely.
– Check water drain at front -arrows- for contamination, and clean if necessary.
– Carefully pour tap water from a measuring beaker into water drain at front. Proceed with caution to make sure no water enters the vehicle interior.
– Check under vehicle if water emerges in area of front wheel housing.
– Repeat procedure on other side of vehicle.
– If no water emerges at relevant positions, clean sunroof

4.57 Water drain valves at rear: check for blockage, clean if necessary
– Open rear left water drain valve -1-, check it for damage, and remove any blockages.
– Repeat procedure on other side of vehicle.