Leaking when it rains? Where in the hell is this water coming from?

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I had my front and back windshields ('69 Barracuda) installed using urethane sealer by a glass installer. I figured that I would never have to remove it unless it gets broken/cracked badly. If I do ever remove it I'll just cut the rubber and replace it. A new rubber seal is a small price to pay compared to the damage and hassle caused by leaks around the glass.


Seriously...how often does a person remove their windshield after restoring their car???
Treblig
 
ok so more storms (been so wet in So Cal lately), more water on the floor. I removed the glove box and can see now at the upper edge, pinch weld I guess?, is rusty and has water trails. so that is where the cowl is meeting up with the side of the car? beneath the dash? How does one seal it? obviously cant go from the top, but not real sure how to get any sort of caulk or sealant in from the bottom either.
What about some of the putty epoxy stuff, it is like clay, would that be able to be wedged up there and stop the leak??
ideas? that dont require me to remove the dash
 
That pinch weld, if it's the one I'm thinking of anyway, is where the upper cowl is joined to the firewall. It's also under the windshield. So, if you're getting water from there it's probably the windshield seal that's causing problems. You won't be able to do much of anything from the backside, even if you did the water would still sit in the windshield channel and rust that out. You may be able to sneak some sealant under the windshield gasket from the outside if you remove the trim piece and the gasket isn't rock hard. If the gasket is old and rock hard you'll probably have to pull the windshield and replace it.

A picture would help. The other possibility is that the cowl drains are plugged and the water is seeping in through the joint between the cowl and firewall on the side because water is sitting in the cowl, but a pinch weld sounds more like the windshield.
 
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