Help international sleeper window

You need to take the ring off, and check the seal, it may be loose and have to have to be changed because it sounds like when the window is shut, it twists the frame and that leaves gaps between the metal and the window frame that the seal may not be sealing.

 

Mine did the same, then started leaking all the time. Seems to be a common problem. I checked and was told the gasket is not a separate item and whole window has to be replaced. Luckily I have a black truck and a strip of gorilla tape keeps it from leaking for about 6 months before it needs to be replaced

 

Actually guys, there are a few liquid weather stripping things that can be used, I remember I used a silcone based one on my first truck with a seriously leaky sleeper window and it never leaked after that, it was white but paintable. I think 3M made it or maybe GE, crap I'm sorry getting old and can't remember

 

The bad news about those windows is most of the interior including the bunks need to be removed to access the nuts that hold the windows in. The leak is due to expansion foam being used instead of a flexible sealant when the trucks were built. I'm seriously considering making mine permanently closed and using a marine grade caulk to fill the gap between the glass and the body sheet metal.

 

Go to a parts store or auto body supply and get some windshield adhesive. It is black, and does not attract or hold dust. I've used it on some upper windows in one of my KW's, never leaked again and if done properly is not noticeable.