Hello again,
I am about to take the intake out so I can see better what is the problem. I will have a mechanic also coming later here to inspect together with me what is the problem and what parts I need to order etc...
I will also check if the adjustment on the other rockers in case they are also over tightened.
Of course I will take pics + video.
I found a cool video (for later use of How to Properly Adjust Valves on Roller Rocker Arms). I think this will be useful when time comes. He seems he is doing everything right on that video. Of course I will make sure I get correct parts & clearances.
YouTube - ‪How to Properly Adjust Valves on Roller Rocker Arms‬‏
Talk later - Andronikos,