Hi can some please give me some advice, I just got a new radiator, steering rack and gearbox. The car is overheating, using coolant( no leakage), some white smoke coming from the exhaust. Oil isn't milky. Just wondering if I maybe done a head gasket, thermostat or blocked radiator? It's BA 2003 XR8 Sedan with Supercharged.

Cheers for the feedback in advance.

It could be a blown head gasket. if the gasket blows from the water jacket into the combustion chamber then you will get white smoke but not oily water/oil...