How to change and purge coolant. The easiest way

Complete procedure Valid for any car. No knowledge or tools are needed, maybe just a screwdriver.The procedure is for cars with a closed cooling circuit ( that are the majority).
Water at room temperature does not produce any contraction in the metals and it is gradually added, So there is no danger, please do not ask that.
To clean (only for to clean), tap water can be used perfectly, it does not need to be distilled water, because the chemical processes of oxidation and lime deposit need much more time to occur.
Sorry for my English.

Видео How to change and purge coolant. The easiest way канала Jcarlos S