Coolant change on 2007 D4D Yaris - want to be sure I don't mess up

[sven337]

This is very easy to do on this car. I managed to open the petcock from the top of the engine compartment with a limited amount of force and almost without scratching my arm. Didn't have to lift the car, the pan fit under the car with room to spare.
It was so easy that I took the time to re-fill with distilled water then drained again, to help flush a little better.

Now I'm waiting for the engine to cool down before re-opening the reservoir to fill it up again, since it dropped from "B" to under "LOW" kind of quickly (engine temp stayed < 93°C throughout). Next time maybe I should do the engine warmup without the cap on.
Went for another ride today after filling up the reservoir again, and this time temp maxed out at 83° and the reservoir is still at "F" after coming back, so I think I'm good.