There is a rebuild kit for the firewall valve... " . Motorwagenbremseventil" or something.
I ordered one from Germany and the valve went back to normal and quit leaking, so I left
It alone. It was a bag with something like 22 different O-rings in it. I don't know if it covered different models, or it came with duplicates, but looking at the bag of O-rings, and the size of the housing on the fire wall, I'm not sure that even the Germans could cram that
Many O-Rings in there....
I ordered one from Germany and the valve went back to normal and quit leaking, so I left
It alone. It was a bag with something like 22 different O-rings in it. I don't know if it covered different models, or it came with duplicates, but looking at the bag of O-rings, and the size of the housing on the fire wall, I'm not sure that even the Germans could cram that
Many O-Rings in there....