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Engine ventilation modification

Discussion in 'Gen 3 Prius Accessories and Modifications' started by ghost2255, May 26, 2021.

  1. ghost2255

    ghost2255 Junior Member

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    I'm curious what do you think about my idea for modification of engine ventilation system?
    I plan to connect PCV directly to hose between engine and intake(Z shape rubber hose on the top of the engine).
    It will eliminate vacuum in ventilation system and I hope oil consumption will bo gone.

    Am I right or this is stupid PCV mod.png and will not work?

    P.S Sorry for my bad english :)
     
  2. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

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    I think you’ve effectively sealed the crankcase; rerouting the original exit flow to the entrance. In other words: not good.
     
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  3. Grit

    Grit Senior Member

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    No new ideas are stupid, you’re on to something. I’m all for improving our outdated vehicles just like everyone here, hope your mod works out.
     
  4. bisco

    bisco cookie crumbler

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    do it!
    and let us know how it goes(y)
     
  5. ghost2255

    ghost2255 Junior Member

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    The crankcase will be not sealed. Both in/out ways are open. Only The gas flow changes direction.

    This is my idea. I will do it and see what will happen. :)
     
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  6. bisco

    bisco cookie crumbler

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    subscribed, all the best!
     
  7. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

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    The out way feeds back into the in way? Effectively then there is no exit, my opinion.

    BAA1847B-A195-4EA6-96C5-DFFA32859DE7.jpeg
    I think the net effect will be a dirty throttle body.
     
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  8. ghost2255

    ghost2255 Junior Member

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    pcv mod2.png This is corrected gas flow in my modification.

    Dirty throttle body...hmmm maybe. Will see.
     
  9. Jim Swart

    Jim Swart Member

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    Why do you think your oil consumption will be reduced?
     
  10. ChapmanF

    ChapmanF Senior Member

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    I'm kind of wondering how well your mod will do at matching what the system is intended to do at different operating points.

    [​IMG]
     
  11. ghost2255

    ghost2255 Junior Member

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    Like I wrote, I want to eliminate vaccum in ventilation.
    When you remove intake mainfold you'll see how much oil is there. I think this is because PCV valve sucking out oil from crankcase. Oil is only "after" inlet of PCV in IM, thats why I think my mod may reduce oil consumprion.

    Today I will do my mod and will observe few days what will happen.

    Maybe I'm wrong. But I want to see.
     
  12. ghost2255

    ghost2255 Junior Member

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    Done.

    Time to test.
     
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  13. Civiceg94

    Civiceg94 Member

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    Any updates? I am interested in your findings
     
  14. AzusaPrius

    AzusaPrius Senior Member

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    Almost a year of testing, how has this worked out for you?
     
  15. Montgomery

    Montgomery Senior Member

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    Yes, we are all curious. Hopefully some positive results.
     
  16. ToyXW

    ToyXW Active Member

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    I'd rather have the crankcase be in a vacuum. Vacuum reduces aerodynamic drag on the crankshaft and rods which increases engine efficiency. If you're worried about drawing in oil, use a catch can.
     
    Jim Swart likes this.
  17. Abarnabe

    Abarnabe Member

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    it must have thrown an error, there is a sensor near to the pcv and if it doesen't sense what it expects, the engine light will pop up.