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jamie2370 · 09-21-2019, 03:13 PM

You will always have "some" voltage in it. I think the .3 you have is fine. GM dexcool use to have a big problem, like 7-8 volts, that's where all the gunk would come from. They fixed that with a new formula. I've had to put a ground wire on heater cores before because the voltage would eat the aluminum. You can run a ground wire from radiator to frame. It will help a lot but I would not be concerned myself with that low of a reading.

09-21-2019, 03:13 PM	#2
jamie2370 Member Join Date: Dec 2014 Location: Perry, GA Posts: 331 Likes: 11 Liked 239 Times in 90 Posts	Re: Voltage in radiator water You will always have "some" voltage in it. I think the .3 you have is fine. GM dexcool use to have a big problem, like 7-8 volts, that's where all the gunk would come from. They fixed that with a new formula. I've had to put a ground wire on heater cores before because the voltage would eat the aluminum. You can run a ground wire from radiator to frame. It will help a lot but I would not be concerned myself with that low of a reading.