Motor adjustment

I am adjusting to a Nissan V16 GA16 engine and I passed the water to cylinder 4, I have changed the packing 3 vece and the torque is 59 nm and I have given it 80 nm, in case that was that but it is not I need to know what the problem is

Brother I saw what you say, about what is happening to you with cylinder 4 that enters water, I spend something similar and it was the engine plane and the camera you have to check if they are completely right this is a cause of such failures. Place a piece of marble or granite that is completely flat or can be a glass, and place a sheet of paper under compares how tight the leaf is in the different areas of the cylinder head or camera and the engine block if you notice a difference of height or thickness is what I am telling you. You must take it to a rectifier to make the damaged piece flat