Contour Enthusiasts Group Archives Forums General Troubleshooting Is it necessary to flush coolant?

On cars with brass radiators, you used to be able to measure the potential across the "cell". I think they said that over 0.1 volt (?), you needed to change the coolant.
I use distilled or DI water in the radiator after a drain and flush. Distilled costs only about 50 cent per gallon and does not have any solids or hardness which causes the problems in the cooling system.

Thanks guys, does anyone have some kinda pic of the block? I'm am still relatively new to this.

**update**

Acutally I cannot figure out where the block is located so I brought it to a mechanic.

heh for $25 dollars I got an oil change and coolant flush. He just removed the hose from the bottom and all that hot dirty liquid poured out

Thanks for all the help.