2012 Cruze boiling coolant in reservoir. - Page 3
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Thread: 2012 Cruze boiling coolant in reservoir.

  1. #21
    fyrftr422 is offline [OP]
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    Thanks for the info !!!!
    2012 Chevrolet Cruze LT/RS

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  3. #22
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    Coolant reservoir leak

    Today my daughters 2012. Cruze had very little coolant in the reservoir. Not sure where it is leaking from or where the coolant went . I went a head and changed the cap out and removed the unit and checked for cracks underneath. This is the second time I have filled the case.

  4. #23
    2nd Gear CRUISE-CRUZE's Avatar
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    If you will read my post you will learn that the gauge we have is useless, you will boil the coolant without even knowing it! Then the original thermostat is opening "too high" so if you have air into the system or your system is not very well pressurized then you will boil the coolant to a much lower temperature. I did a lot of tests on a few Eco and replacing the thermostat was the best solution. These days are -5F in my area and had no issues with the heater, and during the summer also no more boiling coolant due to the new thermostat. I did the change for a few other cars and none of my friends had issues anymore. If you argue about the thermostat is opening "too low" and "performances" then let me tell you that I didn't see any major change on MPG..

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  6. #24
    fyrftr422 is offline [OP]
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    Well, I have a new reservoir tank and cap arriving within a few days, with the beefier O-rings. This should solve my pressure issue (assuming that is what is happening) so we'll see if the new thermostat does the trick. It already boiled with it, but hopefully, with the pressure situation solved, should be good but replacing the thermostat alone, was not the solution.
    2012 Chevrolet Cruze LT/RS

  7. #25
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    Quote Originally Posted by fyrftr422 View Post
    Well, I have a new reservoir tank and cap arriving within a few days, with the beefier O-rings. This should solve my pressure issue (assuming that is what is happening) so we'll see if the new thermostat does the trick. It already boiled with it, but hopefully, with the pressure situation solved, should be good but replacing the thermostat alone, was not the solution.
    Get some coolant dye and put it in once you're done with the swap out. This dye leaves a visible residue near any leaks.
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  8. #26
    fyrftr422 is offline [OP]
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    Good call, I've heard others were given it by their local GM dealership.
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  9. #27
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    Quote Originally Posted by fyrftr422 View Post
    Good call, I've heard others were given it by their local GM dealership.
    I got mine free but it was while my Cruze was under the B2B warranty. Even if it's not free, a bottle is only $10-15 so it's well worth it to track down leaks.
    fyrftr422 likes this.
    2018 Honda Clarity Touring PHEV - Forest Green w/Tan interior (wife's car)
    2017 Volt LT - Heather Gray; black bow ties, Hidden Content
    2012 ECO MT (Hidden Content ) - Black Granite/Cloth; Hidden Content ; Hidden Content ; OEM Fogs w/Chrome Covers; Hidden Content ; Hidden Content ; Hidden Content
    2010 Mit Lancer GT MT (traded for ECO @31K miles)
    2002 Pont Montana AWD (traded for 2012 LS MT @182K miles - title transferred to son on college graduation)
    1990 Pont Transport (traded for Montana @240K miles)
    1986 Fiero GT MT (traded for Transport - needed more seats)
    1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)

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