Got to Northumberland with no probs, couple of days van refilled with coolant was doing a short drive before heading back home, after a couple of miles the temperature gauge shot up so we pulled over and as i stopped steam came out from under than van (drivers side) and coolant cames splashing out from under bongo on passenger side. called RAC but (5 hour wait!!!) ended up calling local garage who said it looked like rusty bits in coolant causing come kind of blockage so he did what he could to get us going filled up with water (3litres) and coolant and off we set ont he 3 hour trek home.
all the way home the temp gauge kept shooting up to the red and then within a mile before i could even react dropped back down to half way, this happened 3/4 times before coolant alarm went off. so near knaresborough pulled off let it cool completely and refilled with water (all we had) prob abouit 3 litres and carried on with no more probs back to glossop.
got it into the garage (top marks in romiley if anyone knows it- good rep and guy has owned bongo's) the guy in there seems really clued up but the news came today that they have flushed the coolant and are having the same problems once back at garage coolant flooding everywhere, he thinks gasket has gone or (head) cylinder which will be £650-700 to put replace but then that could escalate with more and more knock on effect from there (hoses etc). so thinking its only worth about 1k overall thinking its going to have to go on ebay for spares or scrap!!??

sorry for the long message but bit desperate as once its gone its gone and spent last summer doing self conversion so gutted any ideas??