3rd gen water pump bolts ??

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by kobear18, Nov 28, 2021.

  1. kobear18

    kobear18 Junior Member

    Joined:
    Aug 27, 2018
    86
    16
    0
    Location:
    san francisco
    Vehicle:
    2010 Prius
    Model:
    Three
    Hi every1
    Where can I get the water pump bolts? Well I don't really need the whole set but I just need the longer one. One of my bolts head got stripped so its hard to lose it now. Anyways to un-screw it if the bolt head stripped?

    A small update on my blown head gasket. I took the thermostat out and the water pump doesn't run dry anymore. Now I know the thermostat works sometimes but not all the times. It damaged the water pump when it doesn't fully open so I just took it out. Now the temperature is around 130 most of the times. Perfect for city slow driving like delivering foods and etc. I will give a much more detail update later. I'm thinking of wrapping the radiator with insulation to increase the temp so I can drive a lil faster on freeway.
     
  2. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    2,408
    1,675
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    They are M8x1.25 flange bolts with 12mm hex heads conforming with the J.I.S. (Japan Industrial Standard). They can be purchased from a Toyota dealer or off of eBay.
     
  3. kobear18

    kobear18 Junior Member

    Joined:
    Aug 27, 2018
    86
    16
    0
    Location:
    san francisco
    Vehicle:
    2010 Prius
    Model:
    Three
    Was not able to find on ebay mayb ill look harder. Thanks
     
  4. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    2,408
    1,675
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    Search "M8 JIS flange bolt." They are all over the place. I keep an assortment of them. They come in handy for all Toyotas.
     
  5. kobear18

    kobear18 Junior Member

    Joined:
    Aug 27, 2018
    86
    16
    0
    Location:
    san francisco
    Vehicle:
    2010 Prius
    Model:
    Three
    I wonder what is the length of the longer bolt?? 6cm??
     
  6. Mendel Leisk

    Mendel Leisk Underfoot

    Joined:
    Oct 17, 2010
    47,479
    33,888
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    #6 Mendel Leisk, Nov 29, 2021
    Last edited: Nov 29, 2021
  7. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    16,898
    11,518
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Maybe the longer ones in question are the two -F0855s, because they go through the pump and the timing cover and into the block. The three -80830s at the outer edge there just go through the pump into the timing cover, so those ought to be the shorter ones.
     
    Mendel Leisk likes this.
  8. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    2,408
    1,675
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    The long one is 55mm in length; the short ones are 30mm. Since they are through bolts, and extra 5mm won't matter.
     
  9. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    16,898
    11,518
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    I'm picking up on an interesting coincidence between the mm lengths in Georgina's post and the last two digits of the part numbers in #7.

    Is it certain that the long ones are through bolts? I think they go into the block, but I haven't looked closely to see if it just has some sort of flange there.
     
  10. Georgina Rudkus

    Georgina Rudkus Senior Member

    Joined:
    Sep 15, 2018
    2,408
    1,675
    0
    Location:
    Taylors, SC
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    All of them are through bolts. I went to the car, looked, and measured their lengths.
     
  11. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    16,898
    11,518
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    I stand boldfaced. :)

    The more I look at this, though, the more curious I get. My 2010 liftback manual has all different lengths (35 for the long ones, shorter for the short ones).

    I guess that could be a liftback to v difference, or a 2010 to 2012 difference? I wasn't thinking the 2ZR engine changed in such basic ways across Gen 3 though. Or is the difference a change to the pump? Puzzling.

    I note also different specified torques for the two groups of bolts.

    wp.png
     
    #11 ChapmanF, Nov 29, 2021
    Last edited: Nov 29, 2021
  12. kobear18

    kobear18 Junior Member

    Joined:
    Aug 27, 2018
    86
    16
    0
    Location:
    san francisco
    Vehicle:
    2010 Prius
    Model:
    Three
    Bolt A is only 35mm (1.38 in) ... that doesn't look right. It got to be longer than 35mm. I think I may need to call the stealer ship for this time

    this looks like the right one -
    Toyota 91551-F0855
    Bolt
     
  13. Tombukt2

    Tombukt2 Active Member

    Joined:
    Nov 29, 2020
    1,227
    189
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    I may have to set laying here right on the floor that came with the electric water pump replacement for my 2010 so then may not work for your 12 or later according to what I'm looking at here I have a looked

    SM-A715F ?
     
  14. Mendel Leisk

    Mendel Leisk Underfoot

    Joined:
    Oct 17, 2010
    47,479
    33,888
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Get both? Not a big investment.
     
Loading...