[Benesesso]

Managed to get the lower hose off the rad. Coolant poured out. Captured most of it--now it's in plastic jugs. Poured clean tap water into filler (rad cap) in engine compartment and captured what then came out in front. After ~3 gal. only clean water came out--at least the return line from the rad. got cleaned.

Replaced hose and filled system (somewhat). Water poured out of top rad. air vent. Closed vent. Left filler cap off and started engine. Water level did not get sucked down. Idled engine for ~5 min. Temp. gage worked normally. Kept feeling upper rad. hose (pass. side), never got warm. When temp. gage got to midpoint, something it never did before, shut off engine. Engine hoses hot. Rad. still stone cold. Car can cool off until tomorrow.

The plan was to "feed and bleed" the system with clean tap water until all/most of the old stuff was gone, then flush with demin. water and finally fill with 50/50 Toy. Red.

UPDATE

After it cooled down, I was able to add ~3 more quarts of water. I then restarted it and after ~5 min. the rad. got warm. Temp. gage didn't go above its usual 1/3 of the way up.

Next step is to wait a while, then pull the lower rad. hose off again and drain whatever I can. BTW, I jack the rear up a ways when I do this. Hope I won't have to repeat this too many times before I get clean water coming out.

RE-UPDATE

With the lower rad. hose off, I blew air in thru the rad. drain valve. Amazing how much orange/brown crud was in there.

All clean now.