Update: the source of my rear passenger side leak appears to have be the center seal. A lot of the silicone caulk on the bottom seam of the center seal is cracked/ separated. Probably not a big deal but at that exact location the top silicone seam was also separated which would allow water running down the exterior wall to go directly behind the seal.
Does anyone have a drawing/picture of the center seal construction? I was always told these seals rarely leak and that the source is almost alway something up higher, but I have checked higher up and it is bone dry. Seems like the screws on the center seal allow an easy entry point for water if it gets behind the cover. I really just want to open up that entire mod seal and look for rusty screws. Unsure how one would do that though. Anyone know?
Now the super depressing part. I found more wet luan on the passenger wall behind the kitchen counter. This will be very hard to replace without removing the cabinets/ oven. It seems pretty limited and only extends 4-5 inches up from the floor. It is wet, but I do not see any mold. I am thinking since I am resealing everything anyway, i might be able to run a big dehumidifier out there in the interim to get it all dried out. My thought is If it doesn’t present a structural threat, there is only foam behind (which appears relatively impervious to water), and no mold present, then getting it dried out seems like an acceptable solution.
Tearing apart the kitchen seems like a bit more than I am willing to do at this time.