Weird water draining - Club Touareg Forums
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post #1 of 3 Old 4 Weeks Ago Thread Starter
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Weird water draining

I guess most blogposts here start out "my Treg is doing this weird thing..." And here's another. I heard water sloshing on acceleration and braking, and figured there was water trapped in the frame rail. Have had it before, know what to do. So I park the car on flat pavement, get out my screwdriver and pop out the plug in the center of the rail. Water gushes out, as expected. As NOT expected, water also started draining rapidly to the inboard of the front wheel, from higher up (I couldn't see precisely where it was coming from). That water was definitely not running there from the frame rail plug. What could possibly cause this to happen? It can't be a coincidence that at the exact same time I'm draining the rail, the cowl vents independently decide to let loose...

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post #2 of 3 Old 4 Weeks Ago
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No connection between the cowl and rocker box. Be sure to remove the rubber valve from each end of the cowl.

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post #3 of 3 Old 4 Weeks Ago
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As above remove one rubber grommet from the door sills/rockers on each side of the car and throw them away.

Inside the wings, remove the rubber "valve" on each side, clear any crud from the tube they were attached to and then bin these "valves" as well.

Place a slow running hose on one side of the front windscreen and look into the wheel arch to check the water is flowing out freely.

Then do the same on the other side of the windscreen.

And, yes, it was probably a coincidence but as we have never discovered over the years how water gets into the door sills/rockers perhaps you have indeed just found the missing link!

Later door sill/rocker grommets have a one way valve in them to release water but I didn't bother buying them.

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