Change of antifreeze G12 in Seat Ibiza 1.4

Good morning, I would need to indicate the correct way to change the antifreeze to the Seat Ibiza 1.4 60 hp. I have changed the coolant temperature probe and about 2 liters of liquid have come out and I have replaced it with water to get out of the way. I would like to replace it completely because I think it is the most convenient except that you give me another idea.
Thanks in advance.

Hello Jcerda1, although it is not necessary to change it, since you put yourself, disassemble the two thermostat screws and verify that it does not have cracks where the metal vastago supports (it usually split), because when it breaks, the passage is closed to the radiator and do not see the one that lia you ... well: com motor stop Vacuum, take advantage of washing the circuit with a hose putting water through the thermostat until it comes out clean by the lower one, put the lower sleeve and stuffed by the glass until it comes out through the thermostat and then connect this, fill in the glass up and without putting the plug, starts until the fan turns on, when it turns, demand as one more liter, have it by hand to add it to add it to add it, The engine and expects the engine to cool, after this time, check the vessel level and add if it is necessary, nothing more.