Would yo uuse a Chemical Flush, or Radiator Conditioner, before changing hte Water Pump?

At this point, i think i should use the Radiator Conditioner.. BEFORE i change Water Pump, of course.. im wondering what %26quot;Priming%26quot; a Cooling System means. Seems the white %26quot;Froth%26quot; i saw, indicative of Cavitation, needs to be remedied.. so i can either:





1) Flush System with Chemical Flush, Run Water Through, Repeat (I can do Radiator, then engine, it will all be off anyways for Water Pump...)


2) Put %26quot;Conditioner%26quot; in there and then refill with Coolant; OR


3) use %26quot;Blue Devil%26quot; or something, and then do the same.





I %26quot;Flushed%26quot; it roughly 5000 miles ago, letting water run through and exit the Upper Radiator Hose. until it ran %26quot;Clear%26quot; but i never took the Lower Hose off, as i cant get to it.





So, i %26quot;topped Off%26quot; the Cooling system too, and my car ONLY has an Expansion Tank to add.. it is the %26quot;Radiator Cap%26quot; i suppose you could say...





If you were me, how would yo uSABE mY Cooling System? Water Pump will be Replace.d. What do i do BEFORE? Do i 1) FLUSH, OR 2) %26quot;Condition%26quot; to perhaps Coat something that is wearing Thin, or 3) %26quot;Blue Devil%26quot; to be on the Safe side, THEN Refill?





2992 Olds Calais 2.5L %26quot;Iorn Duke%26quot; Tech4, 180,000 miles.. Water Pump %26quot;Weeping%26quot; i see Drips at start-up AND i saw a white %26quot;Froth%26quot; think layer.. the Flush i put in was the same color, but that was new because i did that a long time ago. Thanks!|||Hello Binky. good to hear from you again.|||Blue Devil