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Old 05-24-2016, 07:19 PM   #1
Fourdy
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Default Radiator voltage readings

I just tested the voltage between the liquid and radiator in my brass Brassworks radiator (.18v) and aluminum Griffin radiator (.14v). Did I do it properly and if so are the readings acceptable? Thanks

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Old 05-24-2016, 07:38 PM   #2
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Default Re: Radiator voltage readings

Of course the readings have to be compared to the chemical make-up of the liquids in the radiator. What were the results of the chemical analysis?
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Old 05-24-2016, 07:51 PM   #3
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Default Re: Radiator voltage readings

Oh Oh, you are talking above my pay scale now. lol Don't think I've heard about that before.

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Old 05-24-2016, 09:04 PM   #4
Dec211975
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Default Re: Radiator voltage readings

Here is a good description for checking for electrolosis, although your readings look acceptable.
http://www.sancarlosradiator.com/Vol...ectrolysis.htm
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Old 05-25-2016, 07:00 PM   #5
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Default Re: Radiator voltage readings

Try grounding the radiator real good.
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Old 05-25-2016, 09:19 PM   #6
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Default Re: Radiator voltage readings

Quote:
Originally Posted by fordor41 View Post
Try grounding the radiator real good.
Na' hook up to the battery to get a slow charge.
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Old 05-26-2016, 06:12 AM   #7
Blu Dice
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Default Re: Radiator voltage readings

Is it a 6 volt radiator or a 12 volt? Did I really ask that question? Sorry senior moment.
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Old 05-29-2016, 10:45 AM   #8
1938 Coupe
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Default Re: Radiator voltage readings

I find this to be shocking!
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Old 05-29-2016, 11:10 AM   #9
19Fordy
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Default Re: Radiator voltage readings

Here ya go:
http://www.sancarlosradiator.com/Vol...ectrolysis.htm
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Old 05-29-2016, 11:21 AM   #10
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Default Re: Radiator voltage readings

And why exactly do I/we want to do this?
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Old 05-29-2016, 02:50 PM   #11
19Fordy
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Default Re: Radiator voltage readings

Probably to check the Ph of the anti freeze to see if his radiator is being "dissolved" due to electrolysis.
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Old 05-29-2016, 03:03 PM   #12
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Default Re: Radiator voltage readings

AHH. Thanks, Fordy
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Old 05-30-2016, 12:39 AM   #13
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Default Re: Radiator voltage readings

Words of wisdom from the late, great Rumbleseat:


CHECKING COOLANT FOR RUST INHIBITORS AND THEIR CONDITION: As we all know,
anti-freeze never loses its anti-freezing ability. It may get dirty, but it
still has the same anti-freeze characteristics as when it was new. HOWEVER, the
inhibitors last only a fairly short time. The most common solution to this
problem, and I think what the manufacturers want us to do, is to replace the
anti-freeze. But why not just replenish the wore out rust inhibitors? Problem
is how to determine the inhibitors are no longer active.
Remembering our old high school physics..... Whenever dissimilar metals are
immersed in a liquid in motion, D-C voltage will result.... or something along
these lines. This will cause softer metals (like aluminum, zinc, brass, and
copper) to transfer to harder metals by electrolysis. Inhibitors prevent this by
reducing or eliminating electrolysis. Determining the condition of inhibitors
can easily be checked using a Volt-Ohm-Meter (VOM). A digital VOM is easier to
use than an analog (analog have scales and a needle) for this test. Turn the
function selector to D-C volts. You’ll be measuring voltages of less than 2
Volts so select a voltage of 5V or less. Hold one of the probes (either one)
suspended in the coolant in the top radiator tank. Don’t let it contact any
metal. Ground the other probe to the metal of the radiator filler or tank. Read
the voltage on the VOM. When the voltage exceeds 0.5 Volts D-C, the inhibitors
are worn out and are no longer doing anything. Adding a can of rust inhibitor is
all that’s required. A voltage reading of 0.5 Volts DC or less show the
inhibitors are still active and there is no need to replenish them. Remember,
anti-freeze never loses its anti-freeze capabilities...... it only looses its
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