Water Leak

[How 29]

After a terrible year with my car just sitting on the driveway most of it I have now discovered a leak in the drivers side. The carpet was soaking from front to back. I have now hopefully dried the carpet out after 6 days with fan heater and de humidifier and need to find the leak. So far I have checked roof drains (they are ok and both sides poor out removed the bungs as well). Checked the shuttle pillar drains again they seem fine and poor out under the wheel arches. I have noticed that where the steering shaft goes through the bulk head there is rubber grommet and there is a pool of water on it and the shaft has surface rust on it. This is above the carpet level so cannot just be transferred from that. I don't think it could leak from the inside of the bonnet inwards into the car as water should run down the shaft not into it (or could it??).
Can you please advise if you have any thoughts to fix.
I have now bought stormforce full car cover so hopefully it will stay dry.

Thanks

Paul

 

[Oddly Godly]

Could check here

View: https://youtu.be/mFgH128YA14

 

[How 29]

Thanks

 

[gookah]

try checking if leaks are from the door membrane. It's easy, open the door and use a hose on the outside of the window and see it it comes through the door and out the bottom of the inside panel,
You would not believe how much water can come from there,
Below problem is on the Z3, might not be similar on the Z4, but the check is just as easy

From my son's post:



Noticed my carpets were soaked a couple of weeks ago when hoovering the car out. Had an idea it was leaking a while ago as I've seen some water trickling out the bottom of the doorcards. Also I did hear a small amount of water sloshing around in the dash. I started with the drains under the scuttle panel below the windscreen thinking they may be blocked. There was some debris in there but it was dry. I put some water in with a hose which confirmed they were blocked. Cleaned them out with some wire and they are now draining well.

So I need to repair the membrane or replace and I'll put some plastic over the main holes to stop it getting in. And then try and dry the carpets but I need to take the hardtop off first to start stripping the interior.

I had a blocked vent in the filler cap which I've cleaned out with some pipe and also sealed the 3rd brake light again as there was a bit of condensation in the boot. Plenty more jobs to come on the zed

Update:

I've had the doorcards off and the butyl sealant holding the membrane is not sealing all the way around, causing the leaks. I've put some plastic sheeting and duct tape in place at the moment just to see if I can cure the leak. It was a lot better, but originally I just closed up the main holes. When applying water it was still coming in where the interior handle is at quite a rate. Now I've sealed the whole section it bypasses everything and empties out the bottom of the doors as it should. This is just a quick fix until I get some better membranes and I have some new butyl sealant ready.