well a quick update on my situation, i didnt do a compression test i just decided to take the head off and see what condition everything is in. To my surprise everything looks spot on and the pistons are as clean as fuck. I supose it must be the big end bearing or i have spun a shell, i will have to take the bottom end out and have a look at that 2mrw. What should i look for on the head and in the piston bores to see the condition??? bcoz as far as i am concerned everything is fine. I am going to do a full rebuild whilst i am here and plan a few special mods.