I seem to have a water leak coming down through where two metal panel pieces are fused together to form the shape of the pillar, the inside of the pillar is hollow but I'm not seeing rusty water coming through. Its quite clear. Can this be explained by a failed windscreen seal or am I looking at a larger issue? I would note that spraying rust-preventative gel in the trim screw holes caused some to drip out in the same spot. The top exterior trim/drain route is sealed with urethane foam and rubberized spray because I got tired of unclogging it.

 

Leaking windshield seal would be my first guess, yes. Doubly so since leaky seals are rather common on these cars

Cheers
DD

 

I'm with Doug on the screen seal. Mine is leaking now and it was only installed new 5 years ago. I had all windows except the front screen leaking after they were professionally installed, I removed the rear and side fixed windows and re-installed with polyurethane sealant and they are still water tight. I do plan on removing the front screen and re-installing with PU sealant.

 

Thanks for the feedback, I coated the outside seal in clear silicone last winter as it clearly leaked, but this one is coming from behind panels not rubber so its odd.