I've found the leak on my ZS!
Discussion
Words can not describe how happy I am right now! For 2 winters our MG has leaked into the passenger footwell (a common problem). I have tried all the normal fixes and nothing worked. So armed with a guide from Honda (who recalled the civics for this same problem) I managed to find the leak.
It looks like when I re did the seams under the wing I missed one and that has failed.
The issue I face is the seam is behind an outer skin that welded on. The access hole for it is no bigger than a 2p coin.

I am unsure how I can reliably get sealant onto the seams in order to fix them through such a small hole and with next to zero visibility. I am wondering if its a good idea to make said hole bigger as I don't believe the metal to be structural.
The other plan is to fill the b
d with cavity wax.
Any ideas?
Here are some shots of what its like on the other side as best I can.



It looks like when I re did the seams under the wing I missed one and that has failed.
The issue I face is the seam is behind an outer skin that welded on. The access hole for it is no bigger than a 2p coin.

I am unsure how I can reliably get sealant onto the seams in order to fix them through such a small hole and with next to zero visibility. I am wondering if its a good idea to make said hole bigger as I don't believe the metal to be structural.
The other plan is to fill the b

Any ideas?
Here are some shots of what its like on the other side as best I can.



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