[3bassets]

I had the same problem with a Model A engine that had been rebuilt by a "specialist", I gave up and purchased a "Diamond Block" and did a rebuild with an experienced machinest. My car runs at 160 now on a 90 to 100 degree day using water and water wetter.

Did an autopsy on the old engine, all the water passages were blocked. Over years of use and rust, this was the problem, the engine had also been over bored.