Oil pump X25XE (and its consorts)

Hello, dears As you can read on the title, I have already paged something. Unfortunately I did not find anything to solve my problem. So, that’s because: The Omega B (X25XE, 1995, 98000km) from my wife sautéed oil without end. So first of all cleverly made (here at you and in other forums) and then close to sealing. To get the engine out and change everything outside at reasonable working height. Now it comes: After assembling the start attempt, it also starts directly; but kei n Oil pressure. From 2500 rpm on, the oil lamp goes off, it goes back to the stationary gas. Have I looked at the graphic of the oil pumps from KurtBerlin. But it doesn’t show which part of the pressure control valve is. Does anyone have an answer? Or can it be something else???? I also read here that it can take up to 1h until the oil is at the top of the camshafts. Does it really last until the clacking of the valves is gone? Thanks already to all who can help me here. Günni