I checked the coolant level in the expansion tank this morning after the car had been sitting all night. I found that the coolant level was about 15mm below the MIN mark on the expansion tank, so I filled it up with coolant up to the MAX mark.
I drove the car for 160 miles today with a mixture of motorway and town driving and the overheating warning light has not come on so far. Seems as though I've solved the problem? Might have been an air lock etc?
And am I enjoying driving my new car or what! My R50 Cooper with 140bhp was incredible fun to drive, but this.......this is really something else!!!
P & T.