Coolant or antifreeze: Green or pink-colored liquid specifically designed to be used inside of the engine as a refrigerant.
Read more
They are glycol-based liquids, which gives them anti-freezing properties. They have additives that stop corrosion and do not settle in the internal parts of the engine. They also elevate the boiling point and stop foam from forming.
I have a leak behind my water pump which I just replaced thinking that that was the problem and even with the new water pump there is still a very sufficient leak behind it I have checked the two freeze plugs that I can see and feel and there seems to be no leak from there can someone please please give me some Direction??