I'm the owner of a 2004 Rover 75 which I am reluctant to part with it. It's a great car and very comfortable. However, twice in the last four years the head gasket has failed, and I was recently presented with a bill of over 700 Euros to have a new one fitted. The garage owner told me to expect another 16,000 miles before it blows again. Is there any long-term remedy to prevent a recurrence? It has only 70,000 miles on the clock.