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View Poll Results: How often do you change anit-freeze?
Once a year 3 15.79%
Once every 2 years 4 21.05%
Once every 3 or more years 6 31.58%
Never 6 31.58%
Voters: 19. You may not vote on this poll

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  #31 (permalink)  
Old 01-18-2019, 03:30 PM
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Originally Posted by billbuch View Post
Not sure you should run a ground to/from the radiator support. You certainly don't want ANY current (+ or -) running through the radiator and/or coolant. Consider installing a ground strap from the block to the frame and a ground cable from the headlights to that same connection, being sure to remove all paint around the bolt hole area. Apply some white lithium grease where you removed paint to prevent rusting. That grease does not affect the conductivity of the connection.

Exactly how are you going to prevent any current from running through the coolant?

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  #32 (permalink)  
Old 01-18-2019, 03:48 PM
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Originally Posted by billbuch View Post
Not sure you should run a ground to/from the radiator support. You certainly don't want ANY current (+ or -) running through the radiator and/or coolant. Consider installing a ground strap from the block to the frame and a ground cable from the headlights to that same connection, being sure to remove all paint around the bolt hole area. Apply some white lithium grease where you removed paint to prevent rusting. That grease does not affect the conductivity of the connection.
I was thinking. battery ground to block, block to frame. coolant in grounded block, flowing through the radiator =
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  #33 (permalink)  
Old 01-18-2019, 05:25 PM
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Grounding

The main reason to keep current out of the coolant whether it's in a radiator, the block, anywhere--is to prevent the softer metals like aluminum from being removed from the component and placed elsewhere. Electrolysis as I understand it is not unlike a plating process like chroming. An electrical current causes this, although some plating is done through chemical action. So what's going on in a radiator or manifold is aluminum is being removed and put elsewhere, because of the excess electrical current in the coolant. By properly grounding your car's electrical system, most if not all the current flow is through metal like the frame, ground straps and cables. Water is a very poor conductor, but it is a conductor. Since electricity always follows the path of least resistance, it will choose conductive metals over water every time...unless there are no metals through which it can flow, i.e., ground straps, etc. Some posted a link to Griffin Radiator's essay on electrolysis earlier in this thread. Check it out.
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  #34 (permalink)  
Old 01-18-2019, 07:48 PM
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While I understand that metal is a more preferable conductor of electrical current than "pure" water, the coolant in our engines is far from pure so therefore it will conduct some electrical current. It also is reasonable to understand that the fact that the coolant is in constant surface touch with the inside of the water jackets of the engine, no amount of grounding is going to stop this from occurring.
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Old 01-19-2019, 05:35 PM
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In chemistry water is called the universal solvent, meaning given enough time it will dissolve any and everything. This only gets worse with heat and dissolved minerals which heat increases the reaction rates while dissolved solids improve conductivity. The water will at some point where dissimilar metals exist act like an electrolyte. No modern metals are pure to themselves so not only in general are there reactions between aluminum and iron parts but also between the various alloying elements found within each material type. Needless to say this gets ugly fast.

When the sacrificial chemistry of the coolant is used up (this also applies to crankcase oil) then the reactions happen between the hard parts. In the big time diesel industry where huge amounts of coolant are used per engine to reduce the cost of complete changes there are replacement concentrate additive packages used on a regular schedule.

Bogie
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