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How To: Change Inverter Coolant

Discussion in 'Knowledge Base Articles Discussion' started by usbseawolf2000, Sep 5, 2009.

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  1. rosienprius

    rosienprius New Member

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    When bleeding, do you have to turn the car into Ready mode?

    I am just trying to make sure I do this completely right.

    Is the car off during the entire process until the bleed screw is tightened or when do you turn the car on?

    Thank you for your help. I'm enjoy the Prius.



     
    #21 rosienprius, Oct 13, 2010
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Make the car IG-ON (where all instrument panel warning lights are on and the Prius is not READY). The inverter coolant pump will be running in this mode.

    After you've drained the system and replaced the drain plug (with new gasket, tightening torque is 29 ft.-lb) then fill the reservoir. After you've filled it as much as you can, run the pump for 15-20 seconds, opening the bleed valve to get air out. Then refill the reservoir and repeat until the air is out of the system and you can see fluid turbulence in the reservoir.
     
    #22 Patrick Wong, Oct 13, 2010
    1 person likes this.
  3. richmond2000

    richmond2000 Junior Member

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    #23 richmond2000, Jun 26, 2011
  4. Howiedude1011

    Howiedude1011 New Member

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    I have a 2002. First timer. I'm changing pump so I figured change coolant since it's been at least 35000 miles according to maintenance records. I want to make sure I'm right on with this .Do I bleed both at the same time and do I have the engine one? Also will a siphon work on this also?
     
    #24 Howiedude1011, Jun 15, 2015
  5. gamma742

    gamma742 Member

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    Done! Around 95K on my 2nd Gen. Watched the video and got the Torque Spec in this thread from Patrick Wong 29 ft. lbs.
     
    #25 gamma742, Aug 18, 2015
  6. Rebound

    Rebound Senior Member

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    Does anyone know the procedure for a Gen III? Specifically, a Gen III Plug-in?
     
    #26 Rebound, Oct 4, 2015
    Mendel Leisk likes this.
  7. Droford

    Droford New Member

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    Does anyone have any suggestions for what to do if you can't open the bleed valve? I've sprayed mine 4 or 5 times but it will not open with a 10 mm rachet wrench. I turned it so hard without it moving that it bent about 1/2 inch over. Given how small it is Im out of ideas. I've gotten a little over 2qts into it but not nearly close to what came out when it was drained. Can it be bled out naturally by letting it sit (i noticed I could add more coolant into the reservoir today as opposed to when I left it yesterday)? Im not going to drive it any time soon since I have other work to do.
     
    #27 Droford, Aug 17, 2020
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