[FLYNAVY30]

Did some more investigating tonight. With the probe in the coolant, the voltage reading is anywhere between .2 and .25 with the ground probe placed on the battery, frame, or engine block.

I did the same test on my 2002 Toyota 4Runner and my wife's 2016 4Runner and got .18 volts in both of those.

So if a minute amount of voltage through the coolant is "normal", is it really the Dexcool that keeps destroying made in the USA radiators? Most of the guys over on the protouring forum with LS swaps and aluminum radiators are running Dexcool with no issues.