2016 Prius c, Just drained both engine and inverter coolant. Only four quarts came out.

Discussion in 'Prius c Care, Maintenance and Troubleshooting' started by dubya, Apr 28, 2022.

  1. dubya

    dubya Junior Member

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    Both reservoirs were full before draining, I also drained the engine reservoir. How to drain the other 3.3 quarts that are in there? Book says 5.6 engine capacity and 1.7 inverter , so 7.3 total. Thanks for any help.
     
    #1 dubya, Apr 28, 2022
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Disconnect the lowest hose on the exhaust heat recovery unit?

    Repair Manual always says to remove the block drain bolt: at least on our 2010 that got me less than a 1/4 cup. And it was a production to get to.
     
    #2 Mendel Leisk, Apr 29, 2022
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  3. dubya

    dubya Junior Member

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    Hi Mendel, Thanks for the reply. Where is the heat recovery unit. I will be ordering a repair manual, what are people using, Climer, Haynes, or is the factory manual a must? Thanks
     
    #3 dubya, Apr 29, 2022
  4. PriusII&C

    PriusII&C Active Member

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    That's the amount of coolant I replaced when I did it: about a gallon.
     
    #4 PriusII&C, May 1, 2022
  5. Mendel Leisk

    Mendel Leisk Senior Member

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    Just noticed you have a c. Assuming it also has this, I'd look just aft of the catalytic converter(s); it's part of the exhaust system, and you'll be seeing (coolant) hoses attached to it.
     
    #5 Mendel Leisk, May 1, 2022
  6. Lukey51

    Lukey51 Active Member

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    I followed this and all went well.

     
    #6 Lukey51, May 27, 2022
  7. Lukey51

    Lukey51 Active Member

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    Me too. No manual needed, IMHO.
     
    #7 Lukey51, May 27, 2022
  8. Matt H

    Matt H Active Member

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    The book states the total system capacity, but there will always be a small amount of coolant left in the system. Heater core, etc. Toyota knows this, and it's the reason the second change interval is at about half of the original; 160,000km/7 years for the first and 80,000km/4 years for subsequent.

    However, if you changed the coolant IAW the video above, the reason you got so little is because you left some coolant in the radiator. There are two places it needs to be drained for the engine, and he only does the drain cock on the engine. There's also a drain cock on the left hand bottom of the radiator (transmission side). It's literally "Step A" in the service procedure.
     
    #8 Matt H, Jun 4, 2022
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  9. amahastpl

    amahastpl Junior Member

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    same here, one gallon originally, then topped off about half a quart after driving around for a day
     
    #9 amahastpl, Dec 21, 2022
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