Monster MotorsportEM Tuning
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  1. #1
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    A3 3.2 V6 PCV valve diaphragm replacement

    I had an extremely poor idle, and thanks to the below threads diagnosed it to a failed PCV valve.

    However, on the 3.2 VR6, the PCV arrangement is under the valve cover. Which is under the inlet manifold. Which can't be removed without sliding forward the slam panel. Which can't be done unless you remove the bumper...

    Anyway, I read the following threads:

    A3 3.2 Perished breather diaphragm - whistling sound from hole in rocker cover

    VWVortex.com - Valve Cover problems on MKV R32

    My PCV valve replacement on Audi A3 3.2, aka shoot me in the face please

    and with a bit of help from this thread: VWVortex.com - TT 3.2 Schrick 268 Cams Install

    saved myself 8 hours labour or so at a garage and fixed it.

    Simple steps (from memory):

    Remove undertray
    Remove wheels
    Undo wheelarch screws
    Undo front bumper screws and nut
    Undo 3 screws on top of bumper
    Pull out bumper
    Disconnect headlamp washer tube
    Disconnect foglight connectors
    Disconnect lower coolant hose guide

    Remove 8x impact bumper bolts
    Insert 4x long bolts in top holes
    Remove 3x vertical screws by headlights
    Pull front slam panel out slightly to check movement OK

    Remove all coilpack plugs
    Remove all coilpacks

    Take out air intake feed
    Remove throttle body
    Remove manifold bolts at side
    Remove all vacuum hoses on manifold
    Remove performance port changeover barrel end-piece
    Remove/move all wires connected to manifold
    Remove 2x bolts holding dipstick guide in
    Remove 9x bolts on front of manifold
    Remove manifold

    Undo all vertical bolts on cam cover (and 2 nuts)
    Undo anything connected to cam cover
    Remove valve cover

    Remove PCV valve from valve cover (torx screws, then lever out)
    Remove circular cap from PCV assembly
    Inspect rubber diaphragm
    Replace rubber diaphragm!

    Pics (click for larger):

    The bolts I used to move the slam panel ("lock carrier to service position" in VAG parlance):


    Halfway stage:


    All the bolts removed:


    Cover off:


    PCV valve/oil separator assembly:


    The innocent looking bit of rubber:


    And the reason for the whole business - the whole thing was very perished:


    And to quote Haynes - "Assembly is the reverse of disassembly"!

    As mentioned, although the PCV/cyclone assembly has a part number (022 103 515 A), it does;t seem to be available separately. However, I can confirm that the rubber diaphragm in the 2.0 TFSI PCV (06F 129 101 N) fits and works perfectly.

    Many thanks especially to the user VagPro on this forum. This is not a difficult task, just a bit of a pain - I am very much an amateur and it took me about 7 hours all in, not rushing at all. However, I had all the tools needed and a workshop to use with a lift! Any questions, please ask.

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  3. #2
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    wow, what a hard job compared to the other versions! lol
    05, A3 8P 2.0TFSI Quattro

  4. #3
    autolatry's Avatar
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    Good job. I paid £180 for the entire cylinder head cover.

  5. #4
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    JJ.Foulds - Yep a ridiculous design!

    autolatry - Ouch. In comparison the 2.0 TFSI PCV was £38.68 today, which I thought was steep seeing as all I needed was 50p's worth of rubber...

  6. #5
    autolatry's Avatar
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    Yeah it's a killer. Just another receipt in the pile.
    I'm selling the car and it's become very apparent I'm about to lose a lot of money.

    Did you get your bumper back on easily enough? I struggle to get it to sit flush where it meets the door. Those three screws and that 10mm bolt are a pain.

  7. #6
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    Yep, bumper seemed to go back on fine - found the 10mm bolt easy enough with a long extension, but admit the screws are a pain.

  8. #7
    Yannis's Avatar
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    How bad was the idle? Did it throw up anything on VAGCOM before you decided that it was the PCV valve diaphragm?

  9. #8
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    It was pretty bad, and VCDS said multiple misfires but nothing specific. The giveaway was the hissing from the rocker cover hole, and that it was fine once the hose from the inlet manifold was removed and blocked.

 

 

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