I have a water leak under the dash board and it rotted the passenger side floor board. It seems to be comming in where the a/c evaporator and blower housing meets the firewall. The sealant is dried and cracking away. For now, Iv'e put a piece of duct tape along the bottom of the windshield to divert the water out away from the firewall and from a test with a garden hose it seems to have stopped it from comming into the car. Does anyone know a way to repair this without having to take that housing out?