EP6 OCC installation
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  1. #1
    Member PUGGSLY308's Avatar
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    Default EP6 OCC installation

    After much reading, I have decided to install an Oil Catch Can (OCC) on the rear PCV pipe, leaving the front intact.
    However, what I cannot yet ascertain is the direction of air flow, ie which ends of (the soon to be cut) pipe 'B' to connect to the OCC inlet and outlet as shown in this image:
    http://www.aussiefrogs.com/forum/att...lves-ep6dt.jpg
    The OCC that I have purchased (again after much reading) is:
    ProVent® Style Oil Separator
    Those example install pictures show very different engines.
    So, should the OCC inlet be connected to the crankcase or to the valve cover?
    Learned replies much appreciated...

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  2. #2
    Tadpole
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    Go with A, stop oil being drawn into the intake

    Sent from my SM-T530 using Tapatalk

  3. #3
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    Tube A goes towards the turbo; tube B into the intake manifold space. They both leave the oil separator built into the head cover.

    En amont = upstream, en aval = downstream of the throttle body

    The instructions for the Forge catch can intercept the turbo hose. EP6 OCC installation-forge.jpg
    Last edited by seasink; 25th October 2016 at 12:05 AM.

  4. #4
    Member PUGGSLY308's Avatar
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    Perhaps I haven't read enough!

    Quote Originally Posted by seasink View Post
    Tube A goes towards the turbo; tube B into the intake manifold space. They both leave the oil separator built into the head cover.
    Ah, my bad. I thought B goes down to crankcase area, ie the sump.

    So then does the Forge setup suggest leaving pipe B intact, ie no blanking off?
    Last edited by PUGGSLY308; 25th October 2016 at 01:42 AM.

  5. #5
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    The Forge product is at Oil Catch Tank Kit for the DS3 1.6 Turbo. Someone has put up the Forge installation leaflet at http://www.mtk-tuning.com/media/docu..._huile_ds3.pdf

    These are for the Citroen DS3 which also uses the 1.6 turbo engine.


    This diagram shows the inlet manifold. Item 13 (c to d) is the breather hose you can't easily see from the front. The spigot shown faintly just above d is for the vapour purge.
    EP6 OCC installation-screenshot-2.jpg
    Last edited by seasink; 25th October 2016 at 09:16 AM.

  6. #6
    Member PUGGSLY308's Avatar
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    Thanks.

    So, nothing done about the rear cam cover to lower inlet manifold pipe?
    So much information out there in forums.
    I read a lot last night and I am now thinking of bringing both cam cover outlets into a Y connection into this large OCC (19mm connections) then back out to the pre-turbo inlet. Blanking off the lower air manifold inlet.
    Last edited by PUGGSLY308; 25th October 2016 at 07:06 PM.

  7. #7
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    I was looking around for more types and found this, with connections to suit Peugeot - Saikou Michi Co. Design. Apparently you fit two, though finding room in a DS3 would be a challenge.

  8. #8
    Member PUGGSLY308's Avatar
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    Yes. I already had quotes including post to Melb. but went with the cheaper Chiptuning one instead. Just clean filter in kero every 10-20k.
    First (current) Pug: 2009 308 XSE

  9. #9
    Member PUGGSLY308's Avatar
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    Does the cam cover have one-way valves built-in?

  10. #10
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    My paraphrase of the French text:
    The oil separator cannot be separated from the cylinder head cover. Three valves are integrated; two regulate the oil vapour returned to the intake depending on the boost pressure. The blow-by valve (in the middle) prevents depression in the block.

    Looking at the picture, they are rectangular plastic flaps at the ends of the internal passages, before the hose connections.

  11. #11
    Member PUGGSLY308's Avatar
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    Many thanks mate.
    First (current) Pug: 2009 308 XSE

  12. #12
    Member PUGGSLY308's Avatar
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    Quote Originally Posted by seasink View Post
    ... Three valves are integrated; two regulate the oil vapour returned to the intake depending on the boost pressure. The blow-by valve (in the middle) prevents depression in the block.
    Interesting.

    I guess that's why some people have reported problems after installing the 'PCV delete' (blanking caps) option.
    Last edited by PUGGSLY308; 30th October 2016 at 09:01 PM.

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