Quote Originally Posted by oj88 View Post
My take is that, you shouldn't. Doing so will cause it to become an anode and encourage electrolyses, the opposite of what you want. But what if you can put in a sacrificial anode to divert the electrolyses from happening in the radiator core?
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From what I understand, this should not make the radiator an anode. Grounding the the radiator ensures that stray current will not
flow through the radiator since current follows the least resistive path (which is the grounding wire).