Oh no...not another coolant question!

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Dale Earnhadrt, Apr 28, 2015.

  1. Dale Earnhadrt

    Dale Earnhadrt Junior Member

    Joined:
    Apr 4, 2015
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    Location:
    chicago
    Vehicle:
    2010 Prius
    Model:
    III
    My understanding is that there are two coolant loops: engine and inverter.

    To service the engine coolant, drain the radiator and overflow reservoir and refill.

    To service the inverter coolant, find the drain plug below engine and drain and refill.

    No need to post about air pockets, etc. Think I got that figured out:



    Is this the correct procedure for both loops?
     
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Mar 8, 2008
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    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    Regarding the engine, you might also open the drain cock in the engine block to see how much fluid comes out, after you have drained the radiator first.

    Regarding the inverter/transaxle, the coolant drain plug is located on the transaxle housing. Do not confuse this with the drain plug for the transaxle ATF, or you will get to replace the ATF as well. I believe that other posters have posted nice photos showing the locations of those drain plugs.

    Or you can obtain factory repair manual info at techinfo.toyota.com
     
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