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I have also a 95 Toyota

Tiny
DAVID ANDERSON
  • MEMBER
  • 1999 FORD ESCORT
  • 141,000 MILES
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.
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Monday, March 4th, 2013 AT 6:07 PM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
They sell coolant hydramators really cheap get one and test your coolant.
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Monday, March 4th, 2013 AT 7:58 PM
Tiny
DAVID ANDERSON
  • MEMBER
  • 11 POSTS
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.
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Tuesday, March 5th, 2013 AT 4:27 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
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.
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Wednesday, March 6th, 2013 AT 5:32 AM

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