could be 3 miles or 300,000 miles.... It's exciting driving a K series!
One eye on the temperature and one on the road.
Having done some reading on the rover forums, some reckon that the cooling system capacity is very marginal on these engines hence HGF if the coolant is allowed to run low. One of my first jobs this week is to replace the coolant and give the system a flush.
Also need to replace the timing belt as well.