Hi guys, I’ve never done coolant flush before. Is this the correct method? • Open radiator cap and drain plug. • When completely drained, tighten drain plug back, and place heater temperature to maximum position so heater core will also be flushed. • Disconnect upper radiator hose from radiator, then place a garden hose in the upper radiator inlet and flush until the water runs clear out of the upper radiator hose. • Add 50/50 of Toyota coolant and distilled water till radiator is full. • Gently squeeze radiator hoses to get rid of air in the system, add more coolant if necessary. • Install radiator cap, and run the engine till it gets to its normal operating engine temperature. • Turn off engine and let it cool. Add more coolant mixture if necessary. Is this correct? And will the coolant in the reservoir be drain once the drain plug of the radiator is open? Any suggestions will be greatly appreciated.