I've got a leak !!!

67Dart273 said
You need to understand how this stuff works. The cowl vent is just a big tub, with raised rings that form "dams" for the vents. There are drain holes on the ends. Also in that mix are the wiper pivots.

So in no particular order, we have

end drains clogged, and built up trash and mud in the bottom of cowl This can allow water to spill over the "dams" and down into the vents

Wiper pivots can leak

And the cowl bottom can be rusted / pinholed through

Somewhere I found some photos of one of these taken apart, for illustration

........And here we go, clicky the link

any tips on cleaning out the cowl?

Ok, It seems the problem is solved. I removed the driver's side floor vent (wasn't necessary), and I had an air nozzle with a 90 degree end. I put that up in there and turned it around. I had all kinds of stuff on top of my hood. I did the same thing on the other side. Without replacing the floor vent, I ran water and no leak.

My next issue is that the hinge on my floor vent is broken, so I'll have to figure something out before I re-attach it.

Thanks again.