My memory is pretty bad, at times. I've changed coolant in my expy twice now. Second time was easy...had it at a small auto shop to pay them to replace lower hose...WAY easier on a lift! I just dumped the new AF in after mechanic replaced hose & topped up after running. But, first time, in driveway, I THINK I did the following: I was replacing thermostat anyway. I removed factory T-stat. Removed upper hose from radiator. Started motor, ran clean water through motor with garden hose (No rust, original coolant still looked like new) When clear water ran through I began pouring gallon after gallon of distilled water through to remove city water. After like, 20 gallons or so, I began to add new coolant. When I could see color change with water/coolant mix running out of radiator I shut down engine, installed new thermostat & connected hose. Topped up with coolant in reservoir.
Now, that's the best I can recall. I may be forgetting a step, or may have done something a bit different, but, that's the best I can remember. Good luck.
