Will look for that drain; thanks.

Yes, I know about anti-freeze. You used to buy anti-freeze and mix it with water in the radiator. Then take a squeeze bulb tester and suck out a little in a glass tube and see how far down in Fahrenheit degrees you were protected. I am not sure they sell undiluted anti-freeze any more so you are paying for water.

Checked out Kent Bergsma on youtube. Learned to be careful removing the steel bolts from the aluminum housing. Really not much more to be learned from him.