I have a 1.7 non turbo fiorino that overheated on the motorway. it is now blowing bubbles into the expansion bottle. the AA man did a sniff test but this was negative.Could it be the pump thats knackered or an air lock ? Or is it the gasket ?
Just bought a turbo van as well, any things to look out for ?

could be air lock, or AA man not doing test right