Just refitted my engine and started it up, started fine first time ( got oil pressure first) sounded nice, after about 5 mins of idling the engine started revving up to about 2500 rpm ( hunting ) and back down on its own, another minute or two and the car started smoking blue from the exhaust, after about 6-7 mins of total running the engine started knocking very badly. The head and the cam cover were extremely hot, yet the coolant was not boiling. Radiator was also getting warm. Turned the engine off immediatly.
any idea whats wrong before the engine comes back out for inspection tommorrow??