Hello, I’m new here in the forum, how could it be different….with a engine problem: My Master 2 / Opel Movano, which was bought two years ago and converted as a camper with G9u 650 engine and 160000km, builds overpressure in the valve lid. Opens the oil filler lid as if with a hairdryer. Or from the connection of the crankcase ventilation, depending on what you open. Crankcase ventilation seems to be usually. If you give gas the pressure less. After a colleague and I had modified the glow plug connection, one could also measure: 20bar,18bar,18bar,26bar. Does anyone have an idea? Blowby after 160000km? Cylinder head gasket? What else could I try next? Unfortunately, no hall is available, so he is now standing in front of the garage. He actually does as always..no increased smoke and no power loss. Does anyone have an idea?