Quote Originally Posted by speedyfix View Post
soon we'll have Purple Ice, it's a coolant additive that increases the bond of water thereby increasing the threshold before it boils.

similar to redlines water wetter.
I was reading the first part when I thought it probably is a wetting agent, and then you mentioned water wetter

On some cars there's a drainage for the coolant on the block. When flushing the old coolant fluid out it's best to also drain it using the block drain so you get all the old stuff out. Just a heads up.

Those with factory heaters also benefit from running the heater full blast for 10 minutes after filling it with plain distilled water to flush out any remaining fluid. Then drain all the fluid out and pour a pre-mixed solution of the coolant of your choice and distilled water.