What kind of antifreeze are you guys using?........
Close drain ****(bottom right corner of radiator), refil expansion tank with distilled water or coolant flush fluid (meh, I didn't), close off expansion tank, and turn on engine. Seat heater to full blast. Run for 10 minutes.
Do this one more time, or twice, if you have no life.
After you flushed, refill with mix of coolant





