1976 Chevy K10. I replaced the leaky vent window on the drivers side. For some reason the bottom of the window has a gap in it that let's air in. I took it back out to make sure the where were in right and that the window was all the way down. I have the washers in correctly as I have the flat one facing forward with a washer on top of the window frame followed by the other 2 washers spring, nut lock and lock. Anyone else experience this?