Took the engine out and started to check what caused the leaking oil.
Took off the rocker arm from the 1-2 side so the valves are shut and turned the engine by hand. You could hear the air blow out of the cylinders at the point where the leakage is.
So I took off the head and that showed some black residue at the side where the leak is. Also the piston #1 is cleaner then #2.
Time to took off the cylinders to see the rings and piston, rings where not at the point were I put them because the gaps where a bit on the middle of the piston, and not at the top.
Then I measured the depth of the cuts in the heads and I that's were the problem is.
Measured the depth of the cuts at the both sides of the head at #1 and #2. 11.64
#1: 15.56mm and 15.61mm
#2: 14.85mm and 14.83mm
When torqued to spec the head is properly seated at #2 but #1 is not seated, these differences are way to much. Did not check this when putting all the parts togged so that's a lesson
Going to check the head at #3 and #4 and ask a machineshop to make them all 4 at the same depth.
Also saw that my crankseal is leaking so I can fix that to.
Some pics: