Thanks again, NPC. Yes, I'm going to run the VC-9 through it for an hour, then repeat with a quart of Simple Green (I have no oil in the system, but figured it will clean out things even more), then flush til water is clean and clear.

BTW, when I do the final fill, I assume the system holds 28 quarts, so can I just add 14 quarts of Gold coolant and then top off with distilled water?