Good day dear community, I had cold water loss over the thermostat, anyway I noticed the engine was overheated and it bubbling out of the cooling water tank. I changed the cylinder head seal. When I started it immediately ran unround and bumped like on 4 cylinders. I went to the search and found a forgotten kitchen roll plug in the 5cylinder sucks that I had forgotten there. After I had removed it no improvement occurred. Since then I have replaced the spark plugs and ignition coils, run the engine without scrumpts, checked the tooth belt level (multiple), did compression test, made exhaust test, on LPG and petrol runs immediately. Mistakes he spits out no meaningful ones. I was yesterday at my workshop, who know no further and would now take the lid down to see what is going on. I think he would have thought I had replaced the camshafts. Does anyone have ideas?