Water Leak???

I noticed about a month ago after a down pour of rain that I had a water spot at the top of the drivers side A-Pillar. I pulled back the weather stripping on the car at the top and there is a small screw that looks old and has some rust on it. This screw is at the same point as the water spot but it is not directly over it, just even with it. I was going to try to just seal that screw but have not gotten around to it so I do not know if that is the cause or not.
Well yesterday after a down pour I get in the car and no water spot, but when I was pulling out I took a left turn and water came pouring out of the plastic part holding the visor to the headliner. Not the part that you can snap the visor in or out but the one closes to the door that holds it in place.
Does anyone have any ideas of the best way to fix? I was thinking of taking the headliner down, but it looks to be a bitch to get off and back on.
Advice is appericated.

Thanks
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John

2003 V8 Sport Black on Black, K&N FIPK 57 series, Yokohama S-Drive tires

Sounds to me like maybe one of your drains for the sunroof is disconnected at the sunroof. Does your car have a sunroof?

-Rod

Yes it has a sunroof. Where are the drains located and how do I fix them. Will I need to take out the headliner, and if so has anyone ever taken one out and was it a pain in the ass?

I don't find a section in the service manual detailing where the drains run, but you probably will need to remove or at least drop the headliner to inspect the drains.

I believe there are typically 4 drains, one at each corner. One runs down each windshield pillar and one runs down each pillar between the front and rear doors.

-Rod