1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2016 Prius ICE Water Pump Replacement

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Vprim, Sep 20, 2022.

  1. Vprim

    Vprim New Member

    Joined:
    Sep 20, 2022
    1
    0
    0
    Location:
    Tampa
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    Hello all! Long time lingerer here finally making a post. I have a 2016 Prius 3 Touring with about 155,000 miles. The other day the dashboard freaked out and made me pull over. I plugged in my OBD and the code said the ICE water pump is stuck. Fast forward to today I am trying to replace it, I got all the bolts out but the pump is too long to take out without the frame being in the way. I tried jacking the car by the motor and setting the motor on a separate jack. But I’m at a complete loss now. Anyone have some advice?
     
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Have a look at the attached. A very quick read, I didn't see anything special though.
     

    Attached Files:

    amos likes this.
  3. Doug McC

    Doug McC Active Member

    Joined:
    Feb 15, 2022
    940
    343
    0
    Location:
    Midwest
    Vehicle:
    2022 Prius
    Model:
    XLE
    Simple, according to what Mendel Leisk posted; all you have to do is pull the engine (see the last step). Definitely not something this diy person could handle, but I realized my limitations years ago.
     
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,073
    14,980
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    That makes me sort of glad I'm not driving a Gen 4.
     
  5. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    amos likes this.
  6. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,253
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    This is, perhaps, a lesson about the risk of relying on out-of-date copies of the Repair Manual (more info), or conversely, the benefit of Toyota’s continuous revision system.

    Some time after the version @Mendel Leisk kindly shared was published, the procedure was changed. The engine assembly with transaxle now remains in the vehicle but is lowered 50 mm and supported by a jack and wooden block, after which the engine water pump assembly can be removed in a specific way.

    This change reduced the Flat Rate Manual labor time for WATER PUMP ASSEMBLY AND/OR GASKET, R&R (operation 161011, ZVW50 series) from 7.0 hours to 1.3 hours.

    Kaizen in action!
     
    Mendel Leisk and Doug McC like this.
  7. Doug McC

    Doug McC Active Member

    Joined:
    Feb 15, 2022
    940
    343
    0
    Location:
    Midwest
    Vehicle:
    2022 Prius
    Model:
    XLE
    THAT IS VERY GOOD NEWS!! And a lesson learned! Thanks for sharing correct information!
     
    Elektroingenieur likes this.
  8. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Kaizen would be to eliminate the paywall for registered owners. (y)

    Can you give any hints about the “specific way”?
     
  9. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Belabouring I know, but:

    seems more like a bunch of very green engineers, with no none keeping an eye on them, coupled with a woeful lack of editorial review. Probably what woke them up was protest from dealership mechanics.
     
  10. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,073
    14,980
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Maybe they should credit 3prongpaul for that!
     
  11. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,253
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    I’d strongly recommend that anyone doing this use the actual manual with Toyota’s cautions and illustrations.

    In the revised removal procedure, after removing certain other components, lowering the engine assembly with transaxle, and applying protective tape, the technician moves the engine water pump assembly “to the right side of the vehicle,” “toward the bottom of the vehicle until the shaft of the engine water pump assembly is free,” and then “toward the front of the vehicle,” after which the assembly can be removed “from the top of the vehicle.”
    I’d imagine it may have been warranty claims, for which Toyota pays for both parts and labor, rather than complaints from dealers, that drove the change in procedure. Perhaps there was a run of defective water pumps, or their failure rate was greater than anticipated—but this is just speculation.
     
    Doug McC and Mendel Leisk like this.
  12. amos

    amos Active Member

    Joined:
    Aug 19, 2017
    340
    281
    0
    Location:
    los angeles
    Vehicle:
    2016 Prius
    Model:
    Two
  13. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,474
    38,106
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Well disconnecting an engine mount and letting the engine slump down, is a lot less egregious, then “remove engine/transaxle”. Honda timing belt replacement required similar.
     
  14. Doug McC

    Doug McC Active Member

    Joined:
    Feb 15, 2022
    940
    343
    0
    Location:
    Midwest
    Vehicle:
    2022 Prius
    Model:
    XLE
    That’s it in a nutshell. For the little effort required and minimal cost (especially diy) every 50k (with strip testing every 6 months) seems like extremely cheap insurance.
     
  15. douglasjre

    douglasjre Senior Member

    Joined:
    Sep 13, 2008
    1,743
    613
    0
    Location:
    Orlando, FL
    Vehicle:
    2010 Prius
    Model:
    ----USA----
    When I worked on tractors in the '90s there was a twin cylinder liquid cooled Honda ride on tractor that needed a starter. The bolts that hold the starter in were inserted from behind the flywheel and threaded into the starter. This obviously requires pulling the engine and the flywheel just to change a starter motor. I was determined at that point to figure out why it was Japan had it in for us
     
    Mendel Leisk likes this.