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Updated intake manifold

Discussion in 'Gen 3 Prius Technical Discussion' started by yeldogt, Aug 4, 2018.

  1. yeldogt

    yeldogt Active Member

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    I believe the Gen 3's got a modified intake at some point -- I'm I correct? If so when did this occur and what was the modification ?
     
    #1 yeldogt, Aug 4, 2018
  2. Raytheeagle

    Raytheeagle Senior Member

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    Somewhere around 2012 and all they did was reduce its volume ;).

    It does not help te cold start knock symptoms :(.

    But that’s the change(y).
     
    #2 Raytheeagle, Aug 4, 2018
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  3. bisco

    bisco cookie crumbler

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    pointless.
     
    #3 bisco, Aug 4, 2018
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  4. Raytheeagle

    Raytheeagle Senior Member

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    At least they put their effort into relocating the egr cooler inlet downstream of the cat for the Gen4;).

    Hopefully that effort wasn’t pointless (y).
     
    #4 Raytheeagle, Aug 4, 2018
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  5. yeldogt

    yeldogt Active Member

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    what was the point of the reduced volume ?

    I was surprised how much junk was in the intake -- mine was basically not working .. only #2 had a bit open.
     
    #5 yeldogt, Aug 4, 2018
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  6. Raytheeagle

    Raytheeagle Senior Member

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    My speculation is reduced volume with the same air flow leads to less residence time or less ability for the egr return material to collect;).
     
    #6 Raytheeagle, Aug 4, 2018
  7. ReadyToRoll

    ReadyToRoll Junior Member

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    As of 2021, my dealer parts guy says there are now 4 versions of the intake manifold. Mine still being the original first version for 2010, is there any reason to upgrade to version 4? I have the intake off and cleaned but not sure if it is worth $ to replace. He mentioned something about plastic pcs coming loose inside the intake in older versions??
    I would only consider it if the upgrade reduced egr clogging issues or general engine performance improvement. Physically mine seems to be in good shape, at least what I can see of it internally.

    Thanks for any reply.
     
    #7 ReadyToRoll, Mar 25, 2021
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