Hello, with my B4 with ABK engine, oil has been coming out slightly on the side of the cylinder head gasket for 1 year (so-called “sweat”, but this has increased recently, so that I think it would be better to change the cylinder head gasket in the near future, after all, he has now almost 150,000 km on the hump with the 1st gasket. Have looked around me a bit on the internet, from time to time the talk of planning the head is a bit surprising. In the original Audi bases like The self-mach books do not talk about this, but just the indication that the flatness has to be checked and that it has to be planned in case of delay of more than 0.1 mm. This seems logical to me – as long as the head was not overheated and was dressed according to the specification, there should be no or only delay within the tolerance. How do you see this? Background: I have heard many bad stories about cylinder head seal change in free workshops (obviously misdressed and undressed). The problem with Audi/VW is the horrendous hourly rates (about 85 Eur in the Stuttgart region), so it can happen back again that after such a vital repair a salted bill follows. Would you at the same time replace the valve shaft seals at the same time? Many greetings, Alex