1999 FORD ESCORT
141,000 MILES
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DAVID ANDERSON
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I have also a 95 toyota.

I would like to know how what readings to interpret as good when checking the coolant with volt meter and ph test strip.

I get a voltmeter readings of 0.4V, and a ph tests of about 9 in both cars.

Internet search gives a variety of acceptable voltages ranging from less than 0.7V to less 0.03V, and PH values from greater than 8 to greater than 10 to be adequate.
Mar 4, 2013 at 6:07 PM
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SATURNTECH9
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They sell coolant hydramators really cheap get one and test your coolant.
Mar 4, 2013 at 7:58 PM
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DAVID ANDERSON
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i realize that you can use a hydrometer to find the freezing point of the coolant, but what I am worried about is the corrosion inhibitors in the anti freeze.
My understanding is that the antifreeze has to be drained out and replaced once the corrosion inhibitors are used up, and that this can be found out by checking the voltage or checking the PH with a PH test strip.
I would like to know the voltage above which the antifreeze should be changed out, and the PH reading below which the antifreeze should be changed out.

Mar 5, 2013 at 4:27 AM
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SATURNTECH9
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I have never honestly ever used a volt meter to check the coolant or pH strips.I just go by condition like freezing point and time and miles the coolant has been in there.How long has the coolant been in there?Its easy to change when doubt just change it coolant is that expensive.
Mar 6, 2013 at 5:32 AM