Having just started using the car since rebuilding it over the last 7odd years.

So far only done around 40 miles whilst running the engine in, the car doesn't over heat at all and sits quite comfortably half way.

I have noticed when I turn it off that the hose just before the thermostat is bubbling a fair amount.

The cars has new hoses, new alloy rad, Waterpump and low temp thermostat. Am I missing something?
Having checked all hoses they're all getting hot as you'd expect so I can't see a blockage also pulled the vent pipe of the top of the housing the shift any last remaining air.

Any advice would be good