New piston design.?

Discussion in 'Gen 3 Prius Main Forum' started by taxidriver50005, Mar 15, 2019 at 9:46 AM.

  1. taxidriver50005

    Joined:
    Jan 3, 2017
    75
    65
    0
    Location:
    GB
    Vehicle:
    2012 Prius
    Model:
    Excel
    Interesting video, yes it's not a prius motor but a Toyota 2.4 all the same with the same issues

    Posted via the PriusChat mobile app.
     
  2. taxidriver50005

    Joined:
    Jan 3, 2017
    75
    65
    0
    Location:
    GB
    Vehicle:
    2012 Prius
    Model:
    Excel


    Posted via the PriusChat mobile app.
     
    Mendel Leisk likes this.
  3. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

    Joined:
    Oct 17, 2010
    31,379
    20,440
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Part numbers* for the pistons, and piston ring sets, for the 3rd gen model years:

    upload_2019-3-15_7-50-42.png

    In model year 2014 the piston is revised, but not the ring set. What I glean from that is that the old piston rings fit in the new pistons. And I think it therefore follows, that the new rings would fit on the old pistons, and that the old and new rings must at least have the same overall dimensions as the old ones.

    * Part numbers found on McGeorge Toyota's online parts pages.
     
    Bay Stater and Aaron Vitolins like this.
  4. Robert Holt

    Robert Holt Senior Member

    Joined:
    Aug 3, 2013
    1,157
    681
    0
    Vehicle:
    2012 Prius
    Model:
    Three
    The video claims that the redesigned piston for the 2.4 liter engine is WORSE due to the oil scavening holes behind the rings being the same number and size, and the cut-out for oil scavenging being eliminated on the new piston. Huh. Now I’m curious about exactly what the redesign for the Prius piston and rings entailed.. Well, does anyone have the 2015 Prius rings and pistons that could be directly compared to the 2010-2013 versions?
     
  5. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

    Joined:
    Oct 17, 2010
    31,379
    20,440
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I'd like to see that too, left a comment on that guys video (at the YouTube location), asking about it.
     
    Robert Holt likes this.
  6. taxidriver50005

    Joined:
    Jan 3, 2017
    75
    65
    0
    Location:
    GB
    Vehicle:
    2012 Prius
    Model:
    Excel
  7. mjoo

    mjoo Senior Member

    Joined:
    Nov 9, 2016
    660
    770
    9
    Location:
    Michigan
    Vehicle:
    2010 Prius
    Model:
    III
    Make sure to install the OCC and clean the EGR while yanking out those pistons.;)

    Pixel XL ?
     
    #7 mjoo, Mar 16, 2019 at 9:33 PM
    Last edited: Mar 16, 2019 at 9:46 PM
    Bay Stater and Raytheeagle like this.
Loading...