Cooling problem SOLVED

This should have been easy to figure out if you have a heater. If not, then, not

The impeller rusted off the shaft on my old 64 426 one time. It did NOT have a heater, and took a few days before I found it. I had the pump lying on the ground, and tripped on the pump with my big feet.

It "clinkled". "Clinkle" says I? Water pumps don't "clinkle."