Toyota prius gen4 plug in 2016-2022 heat exchanger bypass?

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by Tony1988, May 17, 2024.

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  1. Tony1988

    Tony1988 Junior Member

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    Will all the heat exchanger brake after some time? Should u do the bypass before it brakes?
    If i still got waranty of the car, should toyota service change the heat exchanger for free even if it not have broken already? Some TBA thing i read.
    Cant fint the parts that he shows in the video on autozone for bypass.
    Cant linc youtube video , get error so:
    Youtube:
    Gasket masters
    How to prevent prius head gasket failure
    Thanks
     
    #1 Tony1988, May 17, 2024
  2. bisco

    bisco cookie crumbler

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    1) i don't think so
    2) warranty is different in every country. you need to contact the dealers and/or toyota
    3) search for parts on ebay and etc.
     
    #2 bisco, May 17, 2024
  3. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    I don’t know if anyone has addressed the issue of exhaust gas leaking out of the damaged converter, if the bypass is done?
     
    #3 Mr.Vanvandenburg, May 17, 2024
  4. sylvaing

    sylvaing Senior Member

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    First time hearing about this.
     
    #4 sylvaing, May 17, 2024
  5. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Coolant can leak from the radiator inside the Exhaust Heat Recovery System, but that doesn't mean exhaust flowing through the shell around the radiator can escape, anywhere other than the tail pipe.
     
    #5 Mendel Leisk, May 17, 2024
  6. BiomedO1

    BiomedO1 Senior Member

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    DO NOT bypass a good exhaust gas heat exchanger. The coolant on the other side of the exchanger will keep the seals/soldered portions from melting within the hot exhaust gas stream. Removing the coolant from the exchanger will ensure break-down and eventual failure of that part. In Sweden, I would think you'd want your passenger cabin as warm as you can get it in the winter months.

    Just my 2 cents..
     
    #6 BiomedO1, May 17, 2024
  7. Mr.Vanvandenburg

    Mr.Vanvandenburg Senior Member

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    I phrased it wrong. Addressed the possibility of exhaust coming back through the emptied bypass lines. I saw the comments but don’t know why suddenly the hole that leaked coolant is not there. So exhaust would be leaking out under the car.
     
    #7 Mr.Vanvandenburg, May 19, 2024
  8. Mendel Leisk

    Mendel Leisk MMX GEN III

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    I don’t see why a hole in a radiator (likely a tiny crack), enclosed within an exhaust pipe cylinder, would cause an exhaust leak.
     
    #8 Mendel Leisk, May 19, 2024
  9. PTS

    PTS Member

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    If the exhaust Heat Recirc system was bypassed AND the heat exchanger coolant inlet and outlets were not capped, an exhaust leak could happen.

    Gen4 exhaust heat system.jpeg
    If the Recirc valve is not permanently forced into its warmed up position after a bypass, exhaust gas will be partially restricted as it flows past the exchanger.

    IMG_5133.jpeg
     
    #9 PTS, May 19, 2024
    Last edited: May 19, 2024
  10. Tony1988

    Tony1988 Junior Member

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    Yes You should plug them to i understand, with Hose.
     
    #10 Tony1988, May 19, 2024
  11. black_jmyntrn

    black_jmyntrn Senior Member

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    #11 black_jmyntrn, Jun 4, 2024
  12. Tony1988

    Tony1988 Junior Member

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    but I think that you need a bypass on pipes / hoses that go through the exhaust thing too, otherwise it will leak out exhaust gases and you will get a fail dote on the annual inspection?
     
    #12 Tony1988, Jun 5, 2024
  13. Tony1988

    Tony1988 Junior Member

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    Can a normal bypass hose handle the heat of exhaust gases or do you have to weld them together with steel pipes?
     
    #13 Tony1988, Jun 5, 2024
  14. bisco

    bisco cookie crumbler

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    #14 bisco, Jun 5, 2024
  15. black_jmyntrn

    black_jmyntrn Senior Member

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    #15 black_jmyntrn, Jun 6, 2024
  16. Tony1988

    Tony1988 Junior Member

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    Yes i read your stuff , cant se u bypass the steel pipes to?
     
    #16 Tony1988, Jun 7, 2024
  17. black_jmyntrn

    black_jmyntrn Senior Member

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    lost me there...
     
    #17 black_jmyntrn, Jun 7, 2024
    Mendel Leisk likes this.
  18. Tony1988

    Tony1988 Junior Member

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    So The smog dont leak out
     
    #18 Tony1988, Jun 7, 2024
  19. rjparker

    rjparker Tu Humilde Sirviente

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    Just cap the steel pipes or connect them with a radiator quality hose.
    IMG_5291.jpeg
     
    #19 rjparker, Jun 7, 2024
    Last edited: Jun 7, 2024
  20. Tony1988

    Tony1988 Junior Member

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    do we know what dimension it is on the outer dimensions of the pipes?
     
    #20 Tony1988, Jun 9, 2024
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