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Alloytec oil catch can - how to install?

Discussion in 'VE Holden Commodore (2006 - 2013)' started by clb1997, Jun 22, 2016.

  1. clb1997

    clb1997 New Member

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    Looked inside my intake piping yesterday and found a fair bit of oil residue :(
    Can anyone tell me or preferably show me with pictures how to plumb in an oil catch can for a 195kw Alloytec? I'm confused as to which hoses to use and can't seem to find a thread with pictures of an alloytec engine rather than an lfx.
    Much appreciated!
     
  2. ozNick

    ozNick Active Member

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    At the back of the drivers bank is the PCV valve that goes to the T piece behind the plenum/manifold which goes to both sides of the plenum.
    You need to plumb the first catch can between the PCV valve and the T piece. Easiest to remove everything (carefully) and cut the tube replacing with hose.

    On the passengers side bank will be a breather hose between to the intake tube. Plumb the second one between those two. But remember this one breathes into the engine as well so make sure your catch can is setup so it can't suck the filthy residue back into the engine.

    You can use 10mm silicone hose (SCA) or use 6mm silicone hose (same internal diameter as the original pipe) with 10mm tails for connectivity.

    Hope that makes sense.
    Cheers, Nick
     
  3. clb1997

    clb1997 New Member

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    Cheers mate! Do you have to use 2 cans or is there a way to do it with just one, doesn't really matter either way. just curious.
     
  4. ozNick

    ozNick Active Member

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    Two cans because the ports do different things.

    As I modified some eBay specials the high pressure one has a hose to the bottom of the can. The second low pressure one has a hose only half way down to stop the engine sucking any residue back into the engine.
     
  5. clb1997

    clb1997 New Member

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    So should i disregard this diagram?

    catch can.PNG
     
  6. clb1997

    clb1997 New Member

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    Actually, no, excuse the noobiness I seem to be over-complicating the plumbing. I think i understand now, just to double-check:
    The above diagram is showing how the first can you explained should be installed (Between the PCV and the t-piece). The second can should be plumbed between the breather from the engine to the tube heading to the intake?
    However, just to double check with your last post - when you said you modified the cans, the hoses you mention are ones that you've attached to the inlet valve on the inside of the can in order to force the incoming gases to the bottom? I'm assuming you used steel wool to as a filter?

    Thanks again for your help mate!
     
  7. ozNick

    ozNick Active Member

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    Yes, correct and yes
     
  8. clb1997

    clb1997 New Member

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    Sweet all sorted, thanks again mate!
     
  9. VS_Pete

    VS_Pete Donating Member

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    If you go ahead can u add pics and steps u did please.
    Good luck with it mate.
     
  10. commodore665

    commodore665 expat Saffa

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    Good diagram
     
  11. ozNick

    ozNick Active Member

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    The diagram is close but I connected the hose to the right angle connector just below the T Piece.
     
  12. clb1997

    clb1997 New Member

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    No worries pal, the can is ordered and on its way, when it gets here and i have some spare time i'll put it in and post the pics on this thread
     
  13. VS_Pete

    VS_Pete Donating Member

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    Sweet may help other members also.
     
  14. Capsule

    Capsule Member

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    I did that too so I could direct it towards the can which is on the passenger side.
     
  15. clb1997

    clb1997 New Member

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    Hey guys, just to confirm, even though I'm 99% sure - this is the PCV orifice and connector correct? Did you guys just pull it off the orifice and attach the outlet hose of the can directly onto the connector piece or did you cut the connector off?

    13555599_1364661826882087_588967853_o.jpg
     
  16. ozNick

    ozNick Active Member

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    Remove the connector (trickly little catch at the back).
    Cut the hard hose between the connector and the T piece (carefully) and strip it back slowly so the barbs on the connector and the barbs on the T piece can be used for the hose connections.
    Clean the orifice whilst you have the connector removed.

    As it could possibly have pressure behind it I would not connect a hose directly to the orifice without the connector.

    This is the set up from my VZ (same engine).
    http://forums.justcommodores.com.au/parts-other-items-sale/254225-vz-alloytec-catch-can-setup.html
     
  17. Capsule

    Capsule Member

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    Or, if you're a bit lazy, you can just hose-clamped the new flexible line on the hard ones without stripping.
    It holds pressure fine :)
     
  18. clb1997

    clb1997 New Member

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    Bit of a delay im afraid, the can for some reason hasn't turned up yet :(
    I haven't forgotten however and will post pic of me installing it as soon as i can
     
  19. christojesus

    christojesus New Member

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    hate to dig up a 2 year old thread but just trying to clarify on how to set up and plumb in the catch can so from the aus drivers/ usa pass side vent goes to the in port on the catch can then the out will go and t off to the two intake ports on the plenum? for the second catch can on the fresh air intake side it would go from the fitting on the air intake to the in on the catch can? then the out would go to the vent on the aus pass/ usa drivers side? hopefully someone is still following this thread as its been the best information i could fing
     
  20. Capsule

    Capsule Member

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    The aus driver/us passenger side is illustrated in post #5.

    For the other side, you're right, cut the line that goes from the airbox into the other side.
    Airbox side in the catch can inlet, motor side to the catch can outlet.

    You could also simplify the airbox setup by adding a small filter on the catch can itself and bypass the airbox completely. Make sure you plug the airbox hole if you do so.
     
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