Yeah, I'm not exactly sure why there is a valve. I'd assume to stop road water from getting in but, you know what they say about assuming.Heck, that's what you want water on the ground not on the floor inside, L0L. Strange that would have a valve, love to know the logic behind that ?
What we get today with computers, a CAD app & engineers with nothing better to do. Make a part, for who knows what reason ..
It opens manually with the flow of the water. I will post pictures when I get the replacement part which required special ordering. It is located right behind the battery tray and it seems it only collects water run off from the cowl. Here is the link with the part and a diagram. https://www.tascaparts.com/oem-parts/ford-drain-valve-dg9z54503a20b/?c=Zz1ib2R5JnM9Y293bCZpPUpDMTU0MzU1JnI9NSZhPWZvcmQmbz1tdXN0YW5nJnk9MjAxNSZ0PWVjb2Jvb3N0JmU9Mi0zbC1sNC1nYXM=This is an interesting thread. Since the S550 inception, this is probably the very first tech thread on the subject matter.
Can you either please post pics of this “cowl drain valve” from your vehicle to show the exact location and what the part looks like or any from the shop manual?
So is this cowl drainage valve being operated by electrical mechanics OR does it open manually with weight of water flow from cowl?
Does it serve any functional purpose for the HVAC system?
My first thought was that this would bring in fresh air from the outside and is operated by electric vacuum doors under the dash based on user settings.
Exactly, I am going to remove the door on the present one once the replacement arrives incase I mess something up. I am not sure what negative effects myself, the only thing I could think of is, in a water fording situation the potential of water rushing into the cabin air filter. Presently, if water got to that height, the flapper valve would stop the water, possibly. That's just my theory though...I’m trying to figure out, what detrimental effects would occur if you just remove the valve’s flapper door completely?
I mean, if the purpose is to drain water from the cowl, why would there be a door on it to begin with? If the door was removed and it’s opened all the time, does it create wind noise or allows excess noise into cabin while the car is in motion?