Voltage in radiator water
 

Getting finished with list of problems. Previous I had high water pressure after car sitting for days. Cap was 16lb. Changed to a 13 lb lever type. I do have stock overflow and open hose to it. Something I was told to check was electrolysis in water. I tested and have .3 of 1 volt in water. I did not put a anode rod in.
My question is .3 volts a problem?
Do I need a anode rod?
Thanks

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.

Re: Voltage in radiator water
 

Hi Jeff,
I fought this in my newly finished 97 S10 last year. I had about the same amount of voltage in the water with an anode. After pulling my hair out and finding a wet spot on the floor where it finally made a hole in the brand new Griffin radiator, I finally took a heavy ground wire with alligator clips and started testing grounds from everywhere. I finally found mine which was ground stud on wiring panel to the floor pan. I finally had no voltage in the water.

Prior, it didnt matter if I had the battery connected or not. I tried tap water, deionized water, water wetter, etc.

It needs a ground somewhere.

Clark D
Omaha NE