probably should post an update in here ,
almost 7 months on and it ended up being spun bearings on cylinder 5 & 6 and the pistons had mashed the valves on both cylinders.
i was going to rebuild but i gave up and bought a 25det
me and a couple of mates pulled the 26 out and i stripped it over a week or so and started parting it out.
right now the car is still off the road as im still tracking down parts for a 25det i bought ,
all im in need of is some oil piping, vacuum lines and a couple of coolant lines.
if anyone's the slightest bit interested ill dig up the pics of everything.
cheers for all your help in trying to work out what was wrong with my engine via a keyboard
shows that SAU is a good community and people aren't afraid to help out !
cheers guys