Cayenne water leak into driver's (RHD) footwell

[AlistairF]

Hi, I wonder if someone can help me? My 2004 Cayenne 3.2 has a water leak into the driver's footwell. I have researched this and and am running out of ideas:
- I have checked the sill drain plugs and the main bulkhead drains (the X like teat things) are missing but the holes are clear.
- The A/C drain on the passenger side is dry and clear of blockages.
- and it doesn't have a sunroof!
The only other clue is that there is damp behind the soft covering on the bulkhead under the carpet and behind the pedals :



Does anyone have any ideas?

Thanks…
Alistair

[AlistairF]

Thanks for the reply. I have removed the two plastic vented covers in each corner next to the windscreen and there is no debris beneath and they are relatively dry. I may remove the wipers and whole cover for a better look tomorrow and see if there are any other things to see?

[AlistairF]

Well, I still have a leak in the driver's footwell.

There is no sunroof so no drains from there and no evidence of leaking on the headlining or pillars.
The A/C drain is clear.

The drain plugs behind the arch liners and ion the sills are all clear.

So the only other thought I have is a bulkhead or windscreen leak. Does anyone have pointers on hw to investigate and resolve these or any other suggestions?

Thanks

Alistair

[AlistairF]

Well, I still have a leak in the driver's footwell.

There is no sunroof so no drains from there and no evidence of leaking on the headlining or pillars.
The A/C drain is clear.

The drain plugs behind the arch liners and ion the sills are all clear.

So the only other thought I have is a bulkhead or windscreen leak. Does anyone have pointers on hw to investigate and resolve these or any other suggestions?

Thanks

Alistair

[AlistairF]

Thank you for all your advice.

So far the screen wash system looks fine so and it seems to get wet when raining and standing still so its the pressure test working up from the bottom. It's finding time to do it when it's dry is a bit problematic!

I shall post a note on how I get on.

Thanks!

[AlistairF]

Thank you for the latest suggestions. I shall pursue these asap… I am getting to know the Cayenne quite well with this investigation!

Your help is really appreciated.

Thanks

Alistair

[AlistairF]

Just an update. I concluded this was in fact a bulkhead leak and not having there Porsche service bulletin I tried a quick fix that has worked. I managed to insert an A4 sized sheet of plastic sheet underneath the plastic grille that provides access to the brake master cylinder reservoir.

This essentially covers the area under the grill and diverts water towards the wing. The car has been dry ever since!

[AlistairF]

Hi, sold my Cayenne about 5 years ago so it’s difficult to remember exactly and I don’t have any photos. As I recall the problem was water running down the bulkhead from the grilles in front of the windscreen. I used an A4 sized sheet of plastic from a stationery binding kit to sit under the grille and shaped it to divert the water away from the bulkhead. I think it went forward to the inner wheel arch.

The sheet was a flat sheet and I shaped it like an S profile and I think it stayed in place without any cable ties, but I can’t be certain.

Sorry I can’t offer further help.