PCV and CCV oil catch cans

Discussion in 'Gen 3 Prius Accessories and Modifications' started by AzusaPrius, Mar 30, 2026 at 7:36 PM.

  1. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,237
    930
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    I have brought this up in the forums before and I believe this to be the best oil catch can setup you can do.

    I used the best locations I could for this type of setup and the OCC I had.

    For the PCV catch can, I was inspired by a post from @sLick415 which gave the best location for a stealth setup for Cali smogs.

    Ther are a few others on here who have adapted this location and they are the following.

    @Tekken
    @tacopyro
    @HappyDad701
    @tri4all


    For the CCV I was doing research online and came across two images that show a catch can on the breather hose.

    This a vacuum on WOT which the prius is usually high rpms and I have a bored TB.

    So I have done a setup with both.

    I know @danlatu had some ideas with messing around with putting another PCV on the valve cover or relocating it to the breather hose.

    I managed to do this without removing the intake manifold and in the near future will be updating the intake manifold to the latest version.

    Stay clean!!! 20260324_130930.jpeg 20260324_131144.jpeg 20260324_131208.jpeg 20260324_131509.jpeg 20260330_151930.jpeg 20260326_140843.jpeg 20260326_140802.jpeg 20260326_142529.jpeg 20260326_140935.jpeg 20260326_142421.jpeg 20260326_142616.jpeg 20260326_142803.jpeg 20260326_143033.jpeg 20260329_122008.jpeg 20260329_121926.jpeg 20260329_121916.jpeg 20260329_122026.jpeg
     
  2. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,237
    930
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Here is an example of what my setup is.

    Also two images of the internals of the oil catch cans I have currently, I do plan on changing them later on.

    Then a few images of others in Japan doing this on the CCV. unnamed.jpeg tapatalk_1775095985661-1.jpeg upr-billet-diffuser-for-billet-techonology-catch-can-3__96234.1511302051.1280.1280.jpeg 2060570_3.jpeg p1.jpeg 2060590_01.jpeg 2060590_03.jpeg
     
  3. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,237
    930
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Last image was supposed to be this uploaded by @RightOnTime if I remember correctly.

    Before I saw this image I was thinking something like this type of setup for the CCV.

    tapatalk_1774816689374.jpeg
     
    #3 AzusaPrius, Apr 2, 2026 at 11:08 PM
    Last edited: Apr 2, 2026 at 11:23 PM
  4. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    2,237
    930
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Here is a full image of the 3rd gen in Japan with a catch can on the CCV. tapatalk_1775183505966.jpeg
     
  5. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
    Oct 17, 2010
    60,926
    41,924
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    CCV is meaning Crank Case Ventilation? Maybe valve cover breather is more to the point?

    I don’t think there’s much (if any) oil coming from that. It feeds into the large diameter hose directly before throttle body, always been completely clean in my experience.

    the hose from PCV (Positive Crankcase Ventilation) is another story, that’s where I would invest in oil catch can, a quality one, or even two in series.

    those screw clamps on the barb connectors can be left off: the barbs alone are effective seals with properly sized hoses, and the clamps are detrimental to hose-end condition.