Electrically Burned two water pumps

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by johnnychimpo, Aug 28, 2021.

  1. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    14,669
    10,293
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    So did you get any insight into what the part actually is and does, or just drive a big punch through it and call it good? :)

    I've seen a few sources on the internet call it a "thermostat". Given that the car already has one of those and we know where that is, and this isn't called one in the Toyota parts catalog, I am still kind of hoping that somebody with access to the European or Japanese manuals will crack the ever-lovin' book and just find out what the thing is and what it's for.

    Also seems to be a tube running along the rear of the block, in the direction of the timing cover. Where does that tube go?
     
  2. RightOnTime

    RightOnTime Senior Member

    Joined:
    Sep 21, 2012
    591
    1,398
    183
    Location:
    Kidnapped in OC, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Thanks for clarifying his setup with those pics!

    You will need to replace the thermostat housing with the US version which is plug and play. Next you will need to plug off this coolant inlet which leads to the European / Japanese thermostat as you will not have provisions for that with the US thermostat. IMG_8731.jpg
     
    Raytheeagle likes this.
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,187
    15,314
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Pics are worth a thousand words;).

    Potential reduction in posts or threads as well:).

    Glad the OP got around to posting them for understanding (y).
     
    RightOnTime likes this.
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    14,669
    10,293
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Just to further clarify, the name of that part on the back of the engine is OUTLET, WATER. The Japanese and European version is 16331-37090 and has the unexplained gray electrical part. The North American version is 16331-37100 and does not have the gray electrical part.

    The thermostat, whether the car is North American, European, or Japanese, is located in the WATER INLET SUB-ASSY, W/THERMOSTAT, connected to the lower radiator hose opposite the water pump; it's the same part number 16031-37010 in all of those markets.
     
    RightOnTime likes this.
  5. RightOnTime

    RightOnTime Senior Member

    Joined:
    Sep 21, 2012
    591
    1,398
    183
    Location:
    Kidnapped in OC, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Yes indeed the ‘outlet water’ as clarified by Chapman would need to be replaced with the US version.

    This assembly also has another function that acts as a thermostat to open at a certain temperature to let coolant into the engine block for a quicker warm up time.

    It’s a genius method that Toyota implemented for climates with colder weather for quicker warm up time!

    View attachment 215450

    Finally the issue that the OP is having is that the harness that is attached to the temperature sensor as pictured is not active which may be causing overheating issues with the water pump.


    From our experience once we did the notifications as noted, we experienced no issues at all with the water pump!

    Glad to share my experience on Prius Chat!
     
    #25 RightOnTime, Aug 29, 2021
    Last edited: Aug 29, 2021
    Raytheeagle and xliderider like this.
  6. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    Can't I just leave this like it is ?
     
    RightOnTime likes this.
  7. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    IMG_20210828_205947.jpg IMG_20210828_193402.jpg IMG_20210828_193402.jpg IMG_20210828_205947.jpg IMG_20210828_204940.jpg IMG_20210828_204940.jpg IMG_20210828_205947.jpg
     
  8. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    Sorry for the double pics
     
  9. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    I messed up by adding water to try to flush out any blockages which I found none of but now there's water in my coolant how do I get it out of there and make sure it's just coolant in there besides just pouring some emptying some pouring some and so forth seems to be working now but it overheats just a little bit I suspect it's due to the water contamination
     
  10. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    14,669
    10,293
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Seems to be a tube running along the rear of the block, in the direction of the timing cover. Where does that tube go?

    Please share your sources! It would be great to know about that.
     
  11. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    IMG_20210306_135922.jpg
     
    ASRDogman likes this.
  12. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    It goes next to the water pump into the engine block
     
    ASRDogman likes this.
  13. RightOnTime

    RightOnTime Senior Member

    Joined:
    Sep 21, 2012
    591
    1,398
    183
    Location:
    Kidnapped in OC, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    You need to plug up that inlet or find a way to modify the Gen 3 harness with the added provisions (plug harness) to make it work

    One to Monitor the temp (white plug)
    One to Open and Close the valve ( black plug)

    IMG_8639.jpg


    Hell - I will send you that part for free if you pay for shipping. I have no use for it
     
    Raytheeagle likes this.
  14. RightOnTime

    RightOnTime Senior Member

    Joined:
    Sep 21, 2012
    591
    1,398
    183
    Location:
    Kidnapped in OC, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Here is a pic of our 12th engine swap, this one being our 1st JDM motor (2018)

    No issues at all and the Customer is happy as Hell

    IMG_8660.jpg


    [email protected]
     
    Raytheeagle likes this.
  15. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    14,669
    10,293
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    That nipple looks like it's right next to the water pump discharge, so my guess would be the flow direction is from there, back toward the 16331 contraption.

    Sure would be nice to see what New Car Features says about all that.
     
  16. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    I'm thinking of putting a hose clamp to see what happens.
     
    RightOnTime likes this.
  17. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    Any thaughts on me introducing water and how best to get coolant back to normal.
     
  18. RightOnTime

    RightOnTime Senior Member

    Joined:
    Sep 21, 2012
    591
    1,398
    183
    Location:
    Kidnapped in OC, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    The ‘contraption’ is hooked up to the EGR cooler. As you may know it uses the exhaust gasses to heat up the coolant that flows inside the cooler fins. Therefore the flow is opposite as per your theory.
     
  19. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    Which part you mean the us version without the grey part? If so yeas please I can PayPal or zelle. Can you post pics on how you blocked that inlet?
     
  20. johnnychimpo

    johnnychimpo Member

    Joined:
    Aug 21, 2007
    414
    89
    0
    Location:
    Monterey
    Vehicle:
    2010 Prius
    Model:
    Three
    IMG_20210828_191026.jpg
    Is mine wrong IMG_20210829_081305.jpg IMG_20210828_192604.jpg IMG_20210828_191026.jpg
     

    Attached Files:

Loading...