Leak in Outside Class C overhang

DrewE wrote:
If it's water coming out from this seam, it's getting in somewhere else and that's just the low point where it collects and finds a way out. I had a similar problem and the cause was the seam between the roof and the cabover front section. The water was running down the inside of the cabover wall and not showing any signs of leakage inside the motorhome, even though a nice puddle had collected and was dripping out the underside seam.

If it's water getting into the RV through the seam, I would think that caulking the leading edge carefully with a sealant would be sufficient.

I actually left the trailing edge of that seam unsealed on my motorhome intentionally after cleaning up and repairing damage from the leak. I though it better to have a way for moisture to escape if it ever got in again rather than forming a puddle in/around/under the bunk board. There's no practical way I can see for water to be pushed backwards into the seam, either when standing still or driving. I guess speeding in reverse or being ham-fisted with a pressure washer might do it.

I would suggest pulling whatever trim you can pull from the inside of the front of the cabover and having a look around there.