Went from this:- To this:- I figured the head gasket was on its way out as she was using water and spluttering a bit at times, I put it under some stress when the thermostat stuck shut. But in fairness the gasket looked good however there seems to be some very very light scoring on canal 1 & 6 so not to impressed. Luckily I have another engine on the shelf and I will split that and check the bottom end.