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  1. #1
    OpelAus Forum Regular ConZo's Avatar
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    What did I just break?

    I was trying to bypass my rear BCS when...

    What is this? It seems like it ran from the rocker cover to throttle body, is it needed or urgent? I'm too scared to start the car now..


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    2004 Arden Blue TS Astri SRi Turbo

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    OpelAus King Dingaling guy 27's Avatar
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    One way valve. Just tape off both ends until you get a replacement
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    OpelAus King Dingaling dutchy's Avatar
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    one way valve. quite expensive from Holden, have a peak at ebay.
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    OpelAus Enthusiast Elliot_O's Avatar
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    I did this the other day, I just joined them together again and let it be, it's still fine.
    Superglue it even

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    OpelAus Forum Regular ConZo's Avatar
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    Click here to enlarge Originally Posted by dutchy Click here to enlarge
    one way valve. quite expensive from Holden, have a peak at ebay.
    Cheers. I have both ends taped off for now as advised and it runs fine. It actually goes a whole lot better since my rear BCS bypass.

    What would I search for to replace this? I looked for z20let one way valve on ebay and get nothing but dump valves haha!
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  7. #7
    OpelAus King Dingaling dutchy's Avatar
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    any automotive non return valve will do. have a look at this company and just sent them a message.

    http://www.ebay.co.uk/itm/Non-Return...item3f37ccd65f
    New, Peugeot 308 GTi 270 MY18 Pearlescent White.
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    http://www.opelaus.com/forums/showth...554#post821554

  8. #8
    OpelAus Forum Regular ConZo's Avatar
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    Click here to enlarge Originally Posted by dutchy Click here to enlarge
    any automotive non return valve will do. have a look at this company and just sent them a message.

    http://www.ebay.co.uk/itm/Non-Return...item3f37ccd65f
    Ours would be the 6 mm wouldn't it? I might order a 6mm one.

    On another note..

    I have taped off my broken one way valve now, would it be best to leave it disconnected permanently if I do it neatly? My understanding is it lets the crankcase breathe back into the plenum/throttle body area and the one way valve is there to stop the crank case pressurizing under boost?

    As I already have an oil breather on my crank case I figured it's already breathing and not breathing oily/hot air back into my throttle body now through this other smaller pipe?
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    OpelAus Forum Regular ConZo's Avatar
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    I just ordered one from Holden for $25.00 but it will take 3 or 4 days from VIC to get here.

    Until then I have taped my existing one off on both ends, this should be ok yeah? I do have another external breather pod running off of the rocker cover as well where it used to plumb back to the air filter.
    2004 Arden Blue TS Astri SRi Turbo

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