When we purchased Albert, back in autumn 2003, overheating occurred on our first trip which was from Bath from Bradford-on-Avon. It was undoubtedly caused by an air lock. This didn't reoccur again until this summer. Twice in 8 years means it isn't a serious problem, but I decided I needed to sort it - it's called peace of mind.
Automatic Air-bleed Valve
I am trying an automatic air-bleed valve of the kind you find on domestic central heating systems. It replaces a manual equivalent that required a screwdriver. Being brass it looks the part and is something else to polish!
