Since i bought the van a couple of months ago I have smelled a musty smell. After 3 days of constant rain last week I finally found a wet spot on the carpet right at the wall on the right side. There is a single window behind the barn doors.

I am going to remove the inner plastic window trim and all the screws holding the wall panel on around the window and see if I can pull the wall panel back far enough to see where it is leaking from. It will be raining pretty hard the next couple of days so maybe I can find it.. I assume the insulation is wet inside.. Earlier I had removed a reading light from the wall to check the connector and the insulation was fiberglass with paper backing to the inside of the van.

Looking at the window from the outside today I noticed a part missing from the window. I guess they are called "weep/drain holes" at the bottom of the window and have a plastic cover over them. One is missing on the window that is leaking. This may or may not be the problem. The van had been detailed not long before I bought it and am guessing the detail folks knocked it off as you can still see the outline of it..

Here are some pics, what are your thoughts?

<a href="http://s472.photobucket.com/user/Annaleigh_123/media/WP_20151229_17_34_06_Pro.jpg.html" target="_blank"><img src="http://i472.photobucket.com/albums/rr88/Annaleigh_123/WP_20151229_17_34_06_Pro.jpg" border="0" alt=" photo WP_20151229_17_34_06_Pro.jpg"/></a>

<a href="http://s472.photobucket.com/user/Annaleigh_123/media/WP_20151229_17_33_16_Pro.jpg.html" target="_blank"><img src="http://i472.photobucket.com/albums/rr88/Annaleigh_123/WP_20151229_17_33_16_Pro.jpg" border="0" alt=" photo WP_20151229_17_33_16_Pro.jpg"/></a>

<a href="http://s472.photobucket.com/user/Annaleigh_123/media/WP_20151229_17_33_29_Pro.jpg.html" target="_blank"><img src="http://i472.photobucket.com/albums/rr88/Annaleigh_123/WP_20151229_17_33_29_Pro.jpg" border="0" alt=" photo WP_20151229_17_33_29_Pro.jpg"/></a>

Here you can see the missing part.
<a href="http://s472.photobucket.com/user/Annaleigh_123/media/WP_20151229_13_46_25_Pro.jpg.html" target="_blank"><img src="http://i472.photobucket.com/albums/rr88/Annaleigh_123/WP_20151229_13_46_25_Pro.jpg" border="0" alt=" photo WP_20151229_13_46_25_Pro.jpg"/></a>

That is not rust in the hole perhaps dirt and the color of the pic. I am not sure this could cause it to leak inside though as it is to drain water that gets inside the window..
<a href="http://s472.photobucket.com/user/Annaleigh_123/media/WP_20151229_17_35_07_Pro.jpg.html" target="_blank"><img src="http://i472.photobucket.com/albums/rr88/Annaleigh_123/WP_20151229_17_35_07_Pro.jpg" border="0" alt=" photo WP_20151229_17_35_07_Pro.jpg"/></a>

 

As a former body shop owner and current auto/truck glass biz guy here's the scoop Annaleigh:

The gaps you show are two fold in nature: poorly fitting choices from the original converter and a time-induced failure of the too-thin sealing material used on the backside of the window frame flanges.

Using a good grade of silicone sealer-----exterior use only---carefully fill the gaps all the way around the perimeter and work it in with a finger or plastic putty knife. Clean up the excess on the window flange and body for appearance sake

Without dismantling your interior, removing the window frames for a complete clean up and re-installation using better quality sealing materials like the aforementioned silicone sealer. That's far easy to write about than do but ultimately the choice will be yours.

HTH