ok guys need to get ready for round two and this thing is starting to really piss me off. i have replaced the thermostat with a genuine nissan one, replaced waterpump with a genuine one, took out the alloy rad and replaced it with the original sr one no diffrence maop its boiling hotde surei replaced coolant with a 50 50 ratio. made a thermo fan shroud for the thermo. running a second bleeder off the plenum to help bleed system. if i feel the bottom hose or tank the water is cold if i touch the top its boiling hot dose this mean my thermostat is not opening still i dont get it im running a second bleeder and all. any ideas guys.