02-05-2023, 02:44 PM
So long as everything is in good condition, the thermosyphon sorts itself out - the higher the temperature, the greater the cooling flow. So a temperature gauge would perhaps be only of use to show a cooling system problem? The only time my car ever boiled was after a stud became loose at the bottom of the radiator, allowing the water to gradually escape. However, even this might not have been picked up by a sensor as it would have been in air, and not water.
The oil pressure gauge reading gives me an idea of how hot the engine is running. It falls away when the engine is working hard on warmer days - suggesting that I perhaps should back off a bit. (It is a late Ruby 3-bearing engine - so reads about 5psi when all is well at 30-40 mph. Pressure is less important with a two-bearing engine since there is no directly-fed centre-main to keep lubricated, but still might give an idea if the engine is getting particularly hot.)
The oil pressure gauge reading gives me an idea of how hot the engine is running. It falls away when the engine is working hard on warmer days - suggesting that I perhaps should back off a bit. (It is a late Ruby 3-bearing engine - so reads about 5psi when all is well at 30-40 mph. Pressure is less important with a two-bearing engine since there is no directly-fed centre-main to keep lubricated, but still might give an idea if the engine is getting particularly hot.)