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

Discussion in 'Prius v Accessories and Modifications' started by Tideland Prius, Sep 28, 2018.

  1. justdog

    justdog Junior Member

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    Yes I had the OBD2 Craftsman that I posted pictures of in the previous posts. maybe it's an older model but it didn't show me any temperature readings. Just codes.

    Posted via the PriusChat mobile app.
     
  2. Topshelf147

    Topshelf147 Junior Member

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    Hey all, looks like it's time for me to join the club. 2011 CT200h in need of new engine. Just read through all 29 pages and wanted to verify thoughts on best option going forward.

    Gen 4 engine (A/B)
    Gen 4 plugs & coil packs
    Gen 4 water pump
    Gen 4 t-stat (jiggle pin removed?)
    Gen 3 intake manifold
    Gen 3 wiring harness
    Gen 3 exhaust
    Gen 3 EGR system
    Gen 3 flywheel and damper

    I believe that covers the essentials other than a coolant line that needs to be teed in and a sensor wire that needs to be extended. Will have to read through everything again and watch the full video series. But wanted to make sure I was on the correct path. Seems like this is the simplest and most trouble free swap combination.

    Please let me know if I've missed any major details, and thanks to all who have posted/shared in here as it's an amazing resource. :)
     
  3. justdog

    justdog Junior Member

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    I used everything on your list except coil packs. I used gen 3 coil packs. Didn't buy new ones, car had 220,000 mi and they still work fine. Runs like a champ. The guys here were a great help and the video was spot on!
     
  4. justdog

    justdog Junior Member

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    Did you already start your swap? I will check in once in a while and answer any of the questions that I can. The guys took their time out to help me so I will try to give back! Good luck it's not so hard
    Posted via the PriusChat mobile app.
     
  5. PNP3

    PNP3 New Member

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    This is in regards to overheating issue after swap. Huge thanks to @cnc97 and @Ragingfit

    Two things need to be made sure.
    (1) @cnc97 - The important thing about the jiggle pin (in thermostat), or hole left behind when you cut it, it must be up, not down. Otherwise, the purpose of it being there is defeated.
    (2) @Ragingfit -

    Sergiy Kovalevych10 hours ago
    Installed a 2016 prius engine in to 2010 prius. Burned two electric coolant pumps(an impeller stuck melted), because of overheating of the engine. The coolant system was creating air bubbles. The problem was very difficult to figure out. The solution was very simple. The level of an expansion tank hose ,which goes from the connection on the engine head to expansion tank must be only up!!! No sag or dip of the hose. By the correct hose leve the bubbles will freely come out to the coolant expansion tank, will not go back to the engine head or to the cabin heating coil. Driving vehicle around 20000 miles (1 year). Didn't have any problems anymore. Good luck guys.
    20201228_172439.jpg
    20201228_174035.jpg
     
  6. RightOnTime

    RightOnTime Senior Member

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    Had an opportunity to tear down a Gen 4 engine. Can you spot the difference?

    IMG_6368.jpg

    Gen 4 on the right
     
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  7. ChapmanF

    ChapmanF Senior Member

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    Water jacket looks kinda different
     
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  8. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Could be miles variation in part, but yeah. Right pic says to me: “just doing my job, nothing to see here”. Left pic not so much.

    Excuse my ignorance, but intakes towards bottom of pic right?
     
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  9. ChapmanF

    ChapmanF Senior Member

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    Looks to me like the Gen 4 head is cast differently, with that bottom water jacket passage cast as three small openings rather than one long one. Maybe a little more support behind the gasket?

    I would hate to think miles variation could make a difference like that. :eek:
     
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  10. RightOnTime

    RightOnTime Senior Member

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    On top
     
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  11. mjoo

    mjoo Senior Member

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    Looks like less or finer soot generated in Gen 4. Globs of soot in gen 3 - attaching to and flaking off gen 3 head. From the soot deposits it looks like Gen 3 head gasket separated from head between cylinders.

    moto g power ?
     
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  12. RightOnTime

    RightOnTime Senior Member

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    Yes indeed! Gen 3 had a leak in cylinders 1, 2 & 3
     
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  13. RightOnTime

    RightOnTime Senior Member

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    Here is another pic of the Gen 4 block

    IMG_6352.jpg

    Those Toyota Engineers really did their homework
     
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  14. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Why was the gen 4 head off?

    The gasket had little pin bubbles, or is that beads of something ?
     
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  15. Raytheeagle

    Raytheeagle Senior Member

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    Miles on the Gen4:whistle:?

    Miles on the Gen3?
     
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  16. RightOnTime

    RightOnTime Senior Member

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    IMG_6354.jpg

    So with the 4th Gen Headgasket they eliminated some of the Triangle coolant ports and replaced it with a small circular port

    IMG_6358.jpg
     
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  17. RightOnTime

    RightOnTime Senior Member

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    Used Gen 4 had a bad main seal that was leaking. Motor has 30k on it
     
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  18. RightOnTime

    RightOnTime Senior Member

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    30k on Gen 4

    130k on Gen 3 (water pump went out but Owner continued to drive the car)
     
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  19. Raytheeagle

    Raytheeagle Senior Member

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    Next layer of the onion: what did the water pump that came out of the Gen3 look like (I.e. did the impeller breach the containment, magnet delaminate, impeller blade shear off, etc)

    And the gen4 engine was from a wreck:whistle:?

    All pieces to the puzzle(y).
     
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  20. mjoo

    mjoo Senior Member

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    Triangle holes for a circular port? That doesn't seem like a benefit. Poor hydrodynamics and stress at the ends of the triangle? Did Toyota go out of their way to create a lemon?

    I wonder if a Gen 4 headgasket would benefit a Gen 3 engine...
     
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