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.
John as much as it may sound hard for you to do, financially etc... Right now you seriously need to think about taking it to a shop and getting it looked at properly before maybe doing more damage to the motor and/or your own mind , otherwise it'll drive you mental.
Right now I would not have the faintest idea as to what the problem is or what the original issue was...
Mat has mentioned numerous times to go get a simple coolant gas test done , this will potentially show an issue ...