77rollalong wrote:
I don't use pre mix when filling a flushed system, as the remaining water in the system will dilute the premix, even if you pull the lower rad hose there will still be water left in the block, and heater core. so i measure out how much pure antifreeze i need , then top off with water and will give the proper antifreeze to water mix.
You have a rough guess as to how much coolant is removed after pulling the lower hose vs what's remaining in the block (total capacity).
If I'm not mistaken coolant even in the concentrated form still comes at a 70/30 ratio. Not sure if one can even purchase 100% pure coolant at a local FLAPS.