Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
Why are you saying there's coolant in the rocker cover? Is there signs of milky oil? How does the engine run when you disconnect say number 6 or 5 ignition lead(anything but 1 or 2)?
Trying to get to the bottom of these issues is a pain and can take ages, took me about 3 months to get to the bottom of my rough running tb42e, which turned out to be an intake gasket that had dried up and didn't seal properly anymore.