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Identifying Gen3 Motor Age - Incl JDM :)

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by MrPete, Aug 14, 2022.

  1. MrPete

    MrPete Active Member

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    In early June, I visited a stocking JDM motor source in Texas, hoping to find a Gen3 engine from 2015 that could be swapped in to replace my oil-guzzling, HG-failing 2011.

    I was told that honestly they didn't know what year the engines are, and it doesn't matter because JDM motors are simply better than US-destined.

    I didn't argue. I just examined a few examples... and walked away from the deal.

    Below is a table with a few part numbers. I would love feedback:
    • Is my logic incorrect?
    • What are other parts whose P/N has varied during the Gen3 edition, and might be visible when looking at a motor?
    My logic:
    • Toyota had a piston/ring design defect until the 2015 model year
    • Getting an earlier engine is going to have the bad pistons/rings
    • If parts from before 2015 are found on an engine, that engine was not built in 2015 or later
    The motors I found all had an EGR Valve from 2013 or earlier. Therefore I walked away.

    Thoughts?

    Code:
    What            P/N         Last yr used
    EGR Valve       25620-37110 2013
                    25620-37120 2017
         
    Intake Manifold 17120-37050 2012
                    17120-37051 2012
                    17120-37052 2013
                    17120-37053 2013
                    17120-37054 2017
    

     
  2. Tombukt2

    Tombukt2 Senior Member

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    I don't know I bought a JDM spec motor for the Gen 3 exactly like I had just with a buttload last miles My car has 240 on it or so so. I'll just run this engine until it fails and we'll see how long that takes with my maintenance and what have you I don't know what the people did before. But anyway I only paid like $1,024 plus shipping under $200 so I didn't think that was a bad deal I could have spent a whole lot more farting around Glad I didn't
     
  3. MrPete

    MrPete Active Member

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    Average JDM is ~37000 miles on transfer to US (due to less driving, and strict inspection that normally takes cars out of service at 7 years.)

    So, on average you'll see oil usage climb rapidly about 75k miles after JDM installed. Maybe more if you do the EGR clean and oil catch can.

    If that's worth $1200 to you, yup a good deal.
     
  4. Stu Wood

    Stu Wood Junior Member

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    I think you can buy a Toyota short block for around $1900.
     
  5. Tombukt2

    Tombukt2 Senior Member

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    Hell I didn't see any oil usage on my persona 13 until 230 and then very quickly the head gasket and then very quickly to rod break and now I'm back to what you're saying is 37,000 mi even if it's 60,000 I've got whatever 180 something a thousand miles to go. For a cost of about $1, 900 or something. So yeah to me that's a smoking deal by that time at my age this car should be long somewhere and I'll be in God knows what or dead so it's perfect. Time I buy a short block for $1,900 pay money to get that assembled to the other parts then I need to do something with the however high mileage head one has needs to be valves ground and all of that stuff and then I'm back to square one and 75,000 mi high oil usage not here. At least not yet
     
  6. Tombukt2

    Tombukt2 Senior Member

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    I have not been witnessed to the 75,000 mi z engine high oil usage I had a one NZ and a Corolla that went to $490,000 miles and then the oil consumption came. And that's the only other z engine I've owned. I've had a few one NZ's. And the host of engines y'all never heard of in older cars.
     
  7. MrPete

    MrPete Active Member

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    Is that a prius?
     
  8. MrPete

    MrPete Active Member

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    A 2015 short block reconditioned... Yep. Not a bad deal. Have not found any at any price lately...
     
  9. MrPete

    MrPete Active Member

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    Remember, the ONLY Prius engine we see these issues with is gen3 2010-2014,with the early years the worst.

    They solved the bad piston in 2014,and the bad rings in 2015. Both before and after those years... Wonderful engines!
     
  10. MrPete

    MrPete Active Member

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    Anyway, not trying to re-discuss the problem here.

    My goal in this thread is easy identification of 2010-2014 motors, without doing a full teardown
     
  11. Tombukt2

    Tombukt2 Senior Member

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    That should be pretty easy in Toyota . I'll have to go talk to my parts manager buddy Thomas way up in Raleigh North Carolina I know that it was doable in the original Toyota days up until about the '90s or the early 2000s you could look at a production number off an engine block and get it pretty close to manufacture date whether that's still holds true I don't know I know the VIN numbers have changed enough that makes a lot of it a disaster I used to be able to just describe my cars by the first four of the VIN like TE27 or what have you and everybody knew what it was. But today oh no you have to say RAV4 hybrid number four trim whatever.
     
  12. Tombukt2

    Tombukt2 Senior Member

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    I was going to say that's how you can tell because they don't have that funky intercooler and EGR valve hanging off the motor which will be there from the JDM importers if it came with the engine if it goes on the engine rather so I guess once you see that not there you can assume that's JDM or that's a Gen 4 right and doesn't that fall into the range of your problem being fixed or not it's got to be a Gen 4 and 2 years or something I don't know
     
  13. Tombukt2

    Tombukt2 Senior Member

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    I'm also waiting for these engine owners with this Gen 4 fixed rings and fixed pistons or whatever it is I'm waiting to see them post that they're at $250,000 plus miles and then we'll start talking like it's fixed I think maybe that's a little early yet I don't know.
     
  14. MrPete

    MrPete Active Member

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    No Vin on JDM ;)

    That's why I am using part numbers.

    The second EGR valve part is for 2014-17, so it includes 2015. No need for gen4...
     
  15. MrPete

    MrPete Active Member

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    Ummm... Why do you imagine JDM and/or Gen4 has no EGR or Cooler?
     
  16. Rawrbinson

    Rawrbinson Junior Member

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    Im also looking for later year engine; what is the product number for the EGR and intake manifold that we WANT to use--in order to determine that it is a later year engine.

    I called my local JDM engine and they couldn't determine the year of which the engine was made. ie 2010 vs 2015 engine.

    EDIT: I think i understand which product number we need; we need P/N
    egr: 25620-37120
    intake: 17120-37054

    where on these devices are the product number's listed? is it on the side of the device?
     
    #16 Rawrbinson, Aug 16, 2022
    Last edited: Aug 16, 2022
  17. MrPete

    MrPete Active Member

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    You've got it correct.
    EGR P/N is easily visible without removing anything. I'm not sure where the P/N for the Intake is. Next time I have mine apart, I plan to look for several P/N's :)

     
    Rawrbinson likes this.
  18. Rawrbinson

    Rawrbinson Junior Member

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    Awesome! I just found a JDM engine that has those specific product numbers on the engine for 1.5k. Hopefully engine swap goes well; my old engine had 240k on it already.