Ok, never say never.
But I have checked this according to the SSR-Manual. Everything is connected as it should be. The setup on the valvecovers is like you say. There is a mesh in the pipe. I have already cleaned it, and tested it. Air can go through, no problem there.
And one thing against crank-case-ventilation beeing the cause: There is no oil pushing out of the oil-checker-stick. There it cam out first when there was pressure on the crank-case…
I will do one more testdrive and see how it goes… :rolleyes: