Will 2016+ EGR cooler fit in a 2012?

Discussion in 'Gen 3 Prius Technical Discussion' started by ZPV12, May 12, 2019.

  1. ZPV12

    ZPV12 New Member

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    2012 Prius v owner, but I thought to post here about my question as the ECR cooler is a common part, and thought there may be more traffic to the Prius liftback tech section.

    I am trying to understand the differences between the EGR cooler for the gen 3 (part number 25601-37010) and 2015+ which have a part number of 25601-37020. Anyone know if there are any physical differences between the two, that would result in the newer part not fitting into a 2012? There seem more used parts for less money, for the newer units which also have much less miles.

    Anyone have any experience with this?
     
  2. CR94

    CR94 Senior Member

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    No experience, but I have heard the newer ones source exhaust differently (from after the converter), so likely are not interchangable.
     
  3. ChapmanF

    ChapmanF Senior Member

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    Maybe somebody will try blocking off the bung on the exhaust manifold, and adding one to the pipe downstream of the converter, and shoehorning a Gen 4 cooler in somehow.
     
  4. ZPV12

    ZPV12 New Member

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    Spoke to my mechanic yesterday and he said to not mess with trying to use different part numbers, regardless of how similar they look.
     
  5. ThatDudeOrion

    ThatDudeOrion Member

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    This thought has crossed my mind as well, but I'm also wondering if the Gen 4 cooler itself is a better design, or if we wouldn't be equally well served to just move the location the exhaust gas is drawn from to post-cat and extend the EGR pipe from that point to the gen 3 cooler
     
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  6. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

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    @Ragingfit elects to retain his 3rd gen intake/exahust manifolds, and EGR system, when swapping a 4th gen engine into a Prius v (essentially the same process as swapping into a 3rd gen Prius) here:

    Swapping in a Gen 4 Prius' 2ZR Engine into the Prius v | PriusChat

    Exhaust manifold differences discussed here:



    I think with enough mods it could be done. But maybe not worth it.

    FWIW, about 18 months and roughly 10K kms after doing the EGR and intake manifold clean, and Oil Catch Can install, when I checked the EGR pipe recently, it was spotless.
     
  7. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

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    I was wondering if I'd understood, but yeah, that last part number is 4th gen Prius EGR cooler.

    Part #11:

    EGR System for 2016 Toyota Prius | Toyota Parts
     
    #7 Mendel Leisk, May 16, 2019
    Last edited: May 16, 2019
  8. mjoo

    mjoo Senior Member

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    From Toyota's part diagrams, the gen 4 EGR cooler looks wider/shorter. Maybe less prone to blockage? It makes sense to make it wider since the EGR flow increased in the Gen 4 from 21% to 28%.

    It would be nice to see a side-by-side photo of Gen 3 EGR cooler vs. Gen 4.
     
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  9. ThatDudeOrion

    ThatDudeOrion Member

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    i've got a spare gen 3 on the shelf if someone wants to send me a gen 4 i can do it :)
     
  10. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

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    Meh, just clean everything, and install an OCC.
     
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