Keeping my 273 commando cooler during these record hot temperatures

Honestly you can lower your t- stat but that will gain you little - bit some.
For me a clean radiator iand water jackets are the best. Even at 50-60years old the junk that accumulates in both amazes me. Sand like crap. Some say left over from casting the engine, some say due to antifreeze degrading. Not sure but I try to change coolant and flush about every 5 years.
Syleng1