DIY - 2014 Opel Corsa D 1.4: Fully flush the coolant

See the first coolant drain and fill here:    • DIY - 2014 Opel Corsa D 1.4: Change the co...  

Following the previous coolant change using normal drain and fill, I wasn't very happy with the results (the coolant was still dirty after more than a month of driving), I decided to do a full coolant flush. I went with a method that doesn't involve thermostat removal and the use of non-distilled pressurized water. To do this I did the following:
I added a radiator and cooling system cleaning solution and drove the car for about 30 minutes in order to allow the solution to work
While letting the car idle and using the pressure from the water pump, I progressively drained the old coolant and replaced it with 100 % distilled water
When the drained coolant became transparent (indicating that the distilled water had pushed out all of the old coolant), I allowed the radiator to drain normally
At the end I knew I was left with about 3 liters of nearly-pure distilled water in the system, since the cooling capacity of a 1.4 Corsa D is 6 liters and a normal drain removes about 3 liters; this meant that in order to achieve the desired 50 % - 50 % mix of antifreeze and coolant, all I had to do was add about 3 liters of 100 % concentrated antifreeze

Disclaimer: This video was made in the hope that it will be useful to other DYI-ers that work on the same vehicle model. The author of the video is not responsible for any kind of personal injury, property damage etc. that may arise if anybody tries to perform the same job on an identical or otherwise similar vehicle based on the contents of the video. Every DIY operation performed on your vehicle poses direct or indirect safety risks to you and those around you. Before attempting any such DIY job, please make sure that you have all the necessary tools, support and confidence to see it through successfully.