SERVICE COOLANT REPLACEMENT at 5yr or 150.000miles
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Thread: SERVICE COOLANT REPLACEMENT at 5yr or 150.000miles

  1. #1
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    Default SERVICE COOLANT REPLACEMENT at 5yr or 150.000miles

    The gen 1 Volts are getting old,,,,must be quite a few that have replaced the Main Battery COOLANT at GM DEALER. HOW was your experience ?. What about the price of the change?. Any problems with the car that have the WOT default sensor?...Any problems after the coolant change ?.

  2. #2
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    Good question, I'm a little over 4 years and 93000 miles into my Gen one. Will know soon enough.
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  3. #3
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    I'm coming up on 5 years, and the 2012 maintenance schedule calls for 5 yrs or 150,000 miles. I notice that later MY Gen1 Volts only require coolant replacement at 150,000 miles, no time constraint. I wonder if I can follow the later MY schedule? Does anybody know?
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  6. #4
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    I just checked the MY2013 manual and it has a footnote that says change at 5 years or 150,000 miles, whichever comes first.

  7. #5
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    I wonder if the coolant really breaks down after 5 years? When I look in the bottle it still looks wet. And if you buy one of those old fashion testers, you can test if you still have freeze/boil over protection.
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  8. #6
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    The coolant in the battery and inverter circuits is probably BETTER looked after and kept at a more controlled temperature than the coolant sitting in bottles on the shelf that are used to replace it.

    How long have those bottles been there?

    I suspect it is a total waste of time, effort, resources and the environment to change these fluids more than one a decade.

    Change the engine/HVAC loop coolant for sure, unless you have never used the engine or HVAC system. In fact, you are probably better swapping that out every 3 years if you use the engine a lot.

  9. #7
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    I guessing but I'd think you would need to change the coolant at 5/150,000 to maintain the 8/100,000 Voltec warranty. So if you are significantly below 100,000 miles it would probably be smart to have it done.
    Last edited by Jetdrive; 03-16-2017 at 04:22 PM.

  10. #8
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    Exactly. A lot of people say "well, it's past the mileage, but it says I can go X amount of time, so I'll do that instead" not realizing it's not a choice on which you do, but rather which ever comes first. The last thing I or anyone should do is forego scheduled maintenance on something that is covered under warranty. Especially when most warranty plans include some type of clause that allows lack of scheduled maintenance to automatically void any remaining coverage.

  11. #9
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    https://en.wikipedia.org/wiki/Liquid_dielectric

    I suspect that after 5yrs the liquid dielectric properties within the 50/50 Dex-Cool premix may begin breaking down which could manifest as possible electrical issues with the Li-ion battery pack down the road..

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  13. #10
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    Quote Originally Posted by somms View Post
    https://en.wikipedia.org/wiki/Liquid_dielectric

    I suspect that after 5yrs the liquid dielectric properties within the 50/50 Dex-Cool premix may begin breaking down which could manifest as possible electrical issues with the Li-ion battery pack down the road..
    Is that 5 years from the time the bottle is put on the shelf, or when it goes into the car?

    If so, do the dealers tell you the manufacturing dates of the fluids they use?

    If it was THAT unstable in the battery/inverter loops at 9 to 25C, then it is surely going to need changing far more often than 5 years circulating around a combustion engine at >100C!?

    What's that rule of thumb? Double rate for every 10C? That should mean you replace the engine coolant every 2 years then wouldn't that mean you should replace the battery/inverter coolant every 100 years?
    Last edited by ampera_jed; 03-17-2017 at 12:39 PM.

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