How to know the piston top dead center of 465 engine control valve?

Hello, car owner, the engine regulating valve of 465, you can know the top dead center by looking at the camshaft, which is 8-shaped. Usually, at the top dead center of a cylinder, the intake and exhaust of one cylinder, two cylinders and three cylinders can be adjusted. On the contrary, the top dead center of four cylinders can adjust the remaining valves. I hope my answer can help you, and I wish you a happy life!