How to Add Coolant: Hyundai i20 (2008-2014) 2009 Hyundai See how to add engine coolant (antifreeze) to a 2009 Hyundai i20 Classic 1 4 Cyl. This free video also shows you how to mix the coolant with water on a 2009 Hyundai i20 Classic 1 4 Cyl. Coolant Flush How-to: Hyundai i20 (2008-2014) - 2009 Adding engine coolant (also known as antifreeze) to your 2009 Hyundai i20 is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine when it is cold for an accurate reading.