Now I have the first question at the front of the plug for the camshaft sensor is a hole where I think it’s for a screw for the head. There’s really something about the oil / coal, however. Should I get that out of there with a screwdriver or rather soak it somehow? Can I clean the edges and so on with brake cleaners reasonably or is it enough if it was cleaned with the cloth?? And if you start to look from the front, the spark plugs are really dirty to the rear… As the rearmost is completely dirty and there was also the most oil around. How can I clean the shaft where the one comes in. Are you afraid that this won’t get close. Can you also use brake cleaners there???