need help with my 84 944 NA water leak

[944fan]

I'm at a loss, I have a big problem. I keep on getting water on the passenger side close to the dash in the back, hard to explain it, I got plenty of pictures. It is not the battery tray, I sealed all the battery tray, remove the fresh air blower cover and seal all that area. I sprayed with waterproof 3m behind the windshield and the fresh air cover, im at a loss. I shinned light and did the smoke test and no light escaped through from the battery tray or from the passenger side. the only smoke I got was from the fresh air vent cover and some from the engine compartment but nothing to suggest that water comes from it. When it rains I get a steady stream of water with no end and it only on one side of the column. The only thing I can think is the windshield but I'm not sure from where in the windshield?

[944 Ecology]

The cover for the interior fan motor (yours is blue) needs to be completely secured to the chassis with the butyl sealant or the water from the windshield will find its way into your heater core, and then to the chassis floor. The butyl needs to go all the way around, inclding the area under the lip of the windshield.

Of course, it could also be the battery tray (they rust and allow water intrusion) and the sunroof drains (a clogged drain will back up and drop water into the cab). If the drains in the door are not open, the water will collect in the door and eventually overflow into the cabin.

[Monkey Wrench]

if you take a squirt bottle of water and put the water stream in front of the air blower from your compressor you can force the water and air mixture down through the sunroof channels and blow/wash them out that way. Wear safety glasses so you dont blow any stuff into your eyes and watch if anyone else is nearby too.

[944fan]

Thank you all for your suggestions, I just did that, that was my initial reasoning that water might get inside through the back of the fresh air blower housing, so I removed the fresh air blower housing and sealed all that area with 3m water proof and sealant and than use a brush and dipped it into liquid rubber and went crazy everywhere. Than use liquid gasket heavy on the back and seal it and let it dried, after it dried I got clear silicone and went around the edges and seal it. I was disappointed after all that hard work and no success. What is interesting is that the stream of water only follows a single path down the column and it is dried everywhere else inside the cabin. It's a single stream of water

[Chalt]

I think the key to finding this is going to be applying water from different locations to see if you can duplicate what the rain is doing.

[Monkey Wrench]

how about a temporary solution, use some packing tape or heat duct tape and tin foil to direct the water right away from the under the hood vent area or redirect it from inside the firewall.

If you can cover up some areas and see it stop, dry things up with a fan or a heater, then uncover smaller areas one at a time looking for the source of intrusion. It'll look funny but just to eliminate that temporarily until you can isolate what the issue really is, it could help? maybe there is a crack in some of that plastic cover?it looks like there is a bulge at the seam in lower right of your picture but that's the wrong side. . You could line the bottom of the battery tray, or cover that blue duct thing up with heat tape and tin foil just as an experiment. Isolate the problem into smaller "sections"