Right so. After a few months i took my car out again for a day on the ice lake. Noticed two broblems: Pressure in the rad and weebit smoke/ coolant from exhaust only when it gets hoter than usually. And it does heat up really quickly. I use cometic head gasket, upon quick search i found that cometic are trouble for some people. I used oem nissan headbolts and tightened to manual spec. Was running 1.4bar boost on a 1:8.5 comp pistons. And sice there's no coolant pool underneath the car i asume that the coolant dissapears in to the engine block. Cheked spark plugs and they all seamed to be the same color(coffe brown) exept 4th was a bit lighter. Any idea before i take thead off???