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Coolant change

Discussion in 'VF Holden Commodore (2013 - 2017)' started by Paul Cordingley, Jun 9, 2019.

  1. Paul Cordingley

    Paul Cordingley Member

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    Call out to those who’ve done this ... the pride and joy has 75K km under her belt, is purring like a kitten (due to 7,500km Mobil 1 oil changes and generally ridiculous levels of babying) and according to the schedule the coolant is due at 105,000 km.

    I’m not one to follow schedules. Has anyone got hints and tips for coolant changes, and perhaps can point me to a video? I’m pretty handy as a hobbyist mechanic so nothing really frightens me, but I’ve never done a coolant change before.

    Thanks!
     
  2. stooge

    stooge Well-Known Member

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    There is a plug at the bottom of the radiator drivers side a hex key is needed to undo it.
    Dump into a bucket.

    Get the correct coolant from the auto parts store and demineralized water if you are not using premix and do a 50/50 mix and refill the radiator.
    If you get premix you dont need to mix anything.
    Get the vehicle upto operating temp letting it idle with the radiator cap off adding coolant when it drops.
    Take it for a drive and check the coolant again the next day just to make sure it is good.
     
  3. Paul Cordingley

    Paul Cordingley Member

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    Thanks Stooge. I take it the system isn’t pressurised by idling to operating temp and that the radiator cap is safe to be off?
     
  4. lordsnipe

    lordsnipe Member

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    Without the radiator cap on, there won't be any pressure built up in the system.
     
  5. Paul Cordingley

    Paul Cordingley Member

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    Right, I just mean it won’t get too hot etc. But sounds not. Thanks!
     
  6. lordsnipe

    lordsnipe Member

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    Idling only, it'll be fine, it won't overheat. If your radiator cap was stuffed and didn't build pressure, it'd overheat whilst driving cos the coolant will boil without the added pressure.

    You want to run it with the cap off, heater on (to bleed the heater core), until the thermostat opens, which is before the fans start running (the fans are basically last resort for cooling). Once the fans have kicked on/off a couple of times, top off the radiator and overflow bottle and should be good. Just check over the next couple of drives in case the level drops with any residual air bubbles.
     
  7. Ron Burgundy

    Ron Burgundy Well-Known Member

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    Draining the radiator is only about 1/2 capacity of the cooling system. If you do it this way you will end up with half of old coolant in the system. Do a search ... there are few ways to do it better...
     
  8. Ron Burgundy

    Ron Burgundy Well-Known Member

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  9. stooge

    stooge Well-Known Member

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    I get about 8l into a bucket which is fine, you could flush it with new coolant and dump again to try and get more out if you like but never fill it with tap water and dump because you will end up with crusty tap water and a mix of 60~70 water to 30~40 coolant.

    The op has 75k so a single dump should be ok for another 75 if that is his change over period.
     
  10. Anthony121

    Anthony121 Well-Known Member

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    I like how some people say make sure heater is on. Have they actually looked to see if there is a valve for the heater water? VE and VF never had these valves installed so the water is always running through the HVAC. You will also need to flush the engine for full coolant flush.
     
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  11. stooge

    stooge Well-Known Member

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    I was under the impression it was up under the dash and it was not pneumatic but electronically controlled.
     
  12. Anthony121

    Anthony121 Well-Known Member

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    Maybe a flap controlled electronically to change direction of air around the HVAC.
     
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  13. lordsnipe

    lordsnipe Member

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    So it is no consequence on the VE/VF as to whether the heater is on or off, but if the same procedure is performed on another car, then it may be required. People work on other cars which aren't VE/VFs....
     
  14. Anthony121

    Anthony121 Well-Known Member

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    This is a VF forum....
     
  15. lordsnipe

    lordsnipe Member

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    Ok, I'll make note to be less helpful next time because we want to be specific to VFs only.
     
  16. Anthony121

    Anthony121 Well-Known Member

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    I do now understand that you are advising how to bleed the cooling system in most types of cars. I was being pedantic as I've see the comment turn on heater full blast to get the coolant into the core. This doesn't really apply to the Holden VF vehicles both V6 and V8.
     
  17. Paul Cordingley

    Paul Cordingley Member

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    This is all good information either way! Thanks.
     

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