P38A Water in the footwell - both sides

cornishboater said:

I have mentioned many times that the plastic rivnuts for the self tappers (as per Keith) loose their foam seals and let copious amounts of water in. Just pop them out and dab silicone on the flange, when you put the screws back in give them a dab too, they sometimes crack due to the wrong screws being used. The main offenders are the ones over the cabin filters, I did all of them to make sure. The old girl hasn't had water in since (6yrs now), it did have huge puddles before that and I checked everything else suggested but these little buggers let a large amount of water in, very bad design!

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This is where all my footwell water was coming from. I took the fan housings out and sealed with Sikaflex as a precaution, but it was pouring in through the rivnuts. I'd check this first.

The headlining water was coming in through the windscreen bonding. Sikaflex sorted that too.

MrGorsky said:

This is where all my footwell water was coming from. I took the fan housings out and sealed with Sikaflex as a precaution, but it was pouring in through the rivnuts. I'd check this first.

The headlining water was coming in through the windscreen bonding. Sikaflex sorted that too.

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Thanks for the feedback. I also wanted to order sika now. May I ask what number you used?
I wanted to buy Sika 529. Or does 522 fit better?
Thank you

I used Sikaflex 291. But only because I had some already.

I doubt it matters much. All Sikaflex stuff is brilliant imo!

this is what it looks like on the passenger side. i'm relieved.
The test was as follows. First pour water in areas above the car - no water in the car. Then roof - no water... Finally, of course, at full strength - no water in the footwell. No drops of water on the bodywork - everything dry.
Then I realised that the water must be coming from underneath - it's actually obvious when you see the photos.
It's probably a gradual process over the years - that's why I didn't notice anything and that's why there's so much rust in those places.

The carpet (marked in yellow) is dry - so nothing is coming from above. The area marked in red is the wettest. The water then spreads downwards - marked in blue.

It is almost identical on the driver's side.

What do you think? Is the theory valid?

The first thing I'm going to do is dry the carpets - with a heater.
Then sand everything down from underneath and seal with underbody protection. Then sand and seal everything on the inside.

Thanks!!!

Check your heater matrix for leaks. Even a slow drip over time could cause that.

It very rarely comes through the body from underneath but you never know

The screw in the first photo is a common leakage point. My perforated metal mod and where I got the metal from

Datatek said:

The screw in the first photo is a common leakage point. My perforated metal mod and where I got the metal from

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Our mesh was about 20€ I think from bricomarche mind you it's been a good few years since I followed your example young maaaaan