Had to remove the radiator to repair a couple of leaks; it's a two-core crossflow. Since the radiator has to wait in line at the repair shop, it would've been a shame not to check that water pump impeller-to-divider plate clearence. Sure enough, there was .140" inch clearence. Temps were in the 205-210 degree range just before the radiator stated leaking. Running staight water for past two weeks has the temps at 230 to 240 degrees, expectedly. The water pump is a reman unit but don't know how old it is. The impeller is cast with eight fins. The only numbers on the housing is "G28". Naturally the divider plate is getting a real beating tonight!
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