When changing out the timing belt, water pump, and other miscellaneous next week, I am also going to flush my radiator fluid. My father informed me that on the vehicles he has flushed the radiator fluid from, he has refilled the radiator with 50% coolant and 50% distilled water.

Something is making me doubt his application, especially with our cars. Can anyone chime in their opinion(s) on this one?

Thank ya!