I would be very surprised if it is the headgasket tbh. When I had the hole in my coolant tank and when the car got to running temp/pressure the coolants absolutely pout the hole.
Ended up running the car on just water to get home and my headgasket etc is all fine. I have some signs of condensation but none of the head gasket.
don't worry i had visions of you just putting it all together after a major strip that was all
over heated possibly but i would guess when the hose came off you stopped pretty soon after with all the steam etc ?
yeah i stopped like 2 secs up the road (where safe to stop) reattached the pipe, filled with just pure water (the massive robinsons cordial bottles, is it 5litres maybe?) i always keep one for just that what happened! it was half full though, so say 2.5litres
well i am not bringing car back over christmas, so when i get back over new years, will top up with some 5w40 (what i put in when i changed oil)
then will see if the oil light comes on, or when my uncle is back from india, try and do a head pressure test!
i hope it hasn't gone, too much hassle doing all the work!