Farmall H Overheating

Rebuilt my 43 H and the engine runs beautifully for about ten minutes, and then overheats. Here are the symptoms: (1) water does not circulate in top of radiator at first, (2) engine gets hot and water starts to circulate then boils over, (3) at boiling point water at top of radiator is too hot to touch, water at bottom of radiator and pipe to water pump is cool, (4) radiator has new top and bottom tanks, core is older.

Since the tractor has new paint I want to identify the problem before taking things apart. Any ideas?

Randy

Thank you for responding.

I fixed my over heating problem today. I am embarrassed to say what it was. I work on my tractors as a hobby. Sometimes they will sit for months before I am able to work on them. In the case of the H, I painted it and then placed a rag in the water pump inlet to keep the weather and bugs out. Weeks later when I assembled the radiator and hoses I forgot to take the rag out.

The tractor runs fine now and stays at the bottom end of green (run). I may have broken the propeller shaft in the water pump, I am not sure. It may be cooling by siphon alone.

Never a dull moment working on these wonderful machines.

Randy

J IN PA