Originally Posted by mpr3369
This window opens up. The inside frame where the handle to open the window is where the water pools up. However it doesn't pool up enough to actually run down the wall inside the camper. The frame is a channel about 1/2" deep. The leak isn't bad enough to build up high enough to leak down the wall. It leaks inside the glass window but not enough to leak down the wall if that makes sense. If not I'll try and get a picture next time it rains.
When new, I had one of mine leaking around the frame and coming out at the bottom of the frame and the wall, not so much inside the frame. I could see it going inside the frame if the water collecting on top and there was a opening in the top of the aluminum frame to come through.
Two seals to look at. One is the one you can see that the window rest on (seems like you checked that). The second is the foam type seal sandwiched behind the aluminium frame and the body of the camper (mine had the seal cutting the corner short. I actually just moved it in place and remounted the window and it sealed up). Probably not the best recommendation to reuse the seal once pulling the window out, but mine separated very clean and ended up being very usable. Some just replace it with butyl tape.