Did you have to keep the cylinder head of a good old Golf III 1.8 /90hp of an acquaintance to the repairer. He should actually only change the valve shaft seals because we didn’t have the tool to do it. First he put the hair ruler on the head and said he could look through in the middle. Not much, but something. Would my decision be better to plan it. Just stupid that still (thin) seal remains were on it, how do you want to judge that? Actually, I wanted to remove and check it myself later on. I had put the combustion chambers up and filled with spirit. Some held up up to 1 bar, but others only 0.5 to 0.6 bar. That is too little, he would rather regrind the valve seats in order to keep it tight. I would have measured under pressure denseness, he did not have a difference. But I didn’t agree with the fact that there would be a little bit of pressure bars in the middle of the wheel.