Check that "rebuilt" water pump to be sure the impeller is turning. Can you flow water through the engine and out of the thermostat housing by attaching a garden hose to the pump inlet?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!