Coolant Flush

[RPGR90s]

I have a question. The other day I wanted to do a coolant flush on my 2019 ST. The car was purchased now and currently has 103k miles. It's been a perfectly flawless vehicle.

 

At the 1st coolant service, I had the Ford dealer flush and re-fill. They swapped out the original orange colored coolant for a green colored coolant. 

 

Now I see that the latest Ford coolant is yellow colored, so that's what I purchased. 

 

I found the drain (boy what a fun job it is getting access to THAT!!) and drained the old coolant. 

I then added a coolant flush with distilled water and let the car come up to temperature.

I ran this for the specified interval (10 minutes) and drained again.

 

The liquid coming out was mostly clear so I filled the tank with the new, yellow colored coolant and brought the engine back up to temperature. 

 

I let the car cool down over-nite and in the morning the tank was a bit low, so I topped it off.

 

But what caught my eye was the coolant reverted back to a solid green color. 

 

Did I miss a step in my probess and possibly not get all the old coolant out?

 

Thanks for any advice or direction.

 

RPG

 

[1004ron]

Running the coolant flush for only 10 mins would not have warmed up enough to open the thermostat and you should set the cabin heating to MAX for it to circulate through it.