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Crankcase Breather Valve Location

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by CHRIS555, Sep 11, 2010.

  1. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 11, 2010]
    This is a guide for thise looking for the crankcase breather valve. Where I have put the arrow it is about half way down at this point. The valve is within a pipe so look carefully for a pipe with a bulge! Have a feel around! The pipe has a couple of jubilee clips and can be got to without taking anything else off if you have skinny wrists! Otherwise you may want to look at taking the coolant tank off.

    Hope this helps......

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    #1
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  3. murran
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    murran Active Member

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    [Sep 11, 2010]
    its further down under the inlet manifold. theres a largish plastic elbow pipe, held in the breather unit on the side of the block, by a green metal clip. then a largish rubber "t" piece. the valve is in between the t piece and the smaller rubber pipe coming up to the maze of other breather pipes.

    if your in any doubt about the valve without stripping anything off the engine, then simply clamp the rubber pipe off with some long nose pliars between the valve and the other breather pipes/inlet manifold. if the idle changes, you know its the valve. simples.
    #2
  4. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 12, 2010]
    Thanks for the helpful pictures, I was looking in that area but didn't realize that was where it was located. Eventually took me approx. 10 minutes to do. My one was in the same condition as yours, as soon as it was fitted my engine management light went out. I let the car run for 10 minutes and it seems to have cured the problem. Would this fault have increased the fuel consumption ?
    #3
  5. blackpool1974
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    blackpool1974 Member VCDS Map User

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    [Sep 12, 2010]
    Your fuel consumption shouldn't of changed, too much air was getting in the engine so it slowed down the ignition of the fuel hence the jumping around at idle and odd misfire, the fault is only valid when your car is at idle anyway
    #4
  6. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 12, 2010]
    Hiya, I'm glad it's helped. On mine it didn't effect fueling, but mine is pretty poor anyway!!
    #5
  7. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 12, 2010]
    Mine wasn't affecting the fuel consumption, I just wondered. Do you reckon i should also change the PRV just in case its knackered too.
    #6
  8. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 12, 2010]
    Possibly, really easy to change, I think the part number is 06A 129 101 D

    Just for clarity it is the black disc at the top of the engine at the back of the plastic engine cover.

    Could also be worth running some redex through as well if not done recently.
    #7
  9. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 12, 2010]
    When my car was remapped a few months ago, they said that they fitted a new PRV cause the old one was knackered. Personally I think they didn't change it, cause the OEM clips where still attached. But I never noticed until weeks after, it didnt look new. I will buy another one anyway just to make sure.
    #8
  10. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 12, 2010]
    Funny you should say that, mine went shortly after the remap - I've bought two PRV's and two Crankase valves just so i've got some ready incase it happens again!

    Are you going to the Audi Internation Driver event in October?
    #9
  11. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 12, 2010]
    What's the date of the Audi International Driver event? I as I got the most of October off work
    #10
  12. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 12, 2010]
    It's on Satruday the 9th October at Castle Combe - if you take a look at the category for shows and events there is a list growing of those attending. You would be going the same way as me, the dreaded M5!!!
    #11
  13. CHRIS555
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    CHRIS555 DOPE with added OCD

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  14. docurley
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    docurley Moderator Staff Member Moderator

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    [Sep 13, 2010]
    Did mine this weekend and my car is running sweet again.

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    #13
  15. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 14, 2010]
    They all seem to fail exactly the same way, cause mine looked just like yours when I changed it.
    #14
  16. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 14, 2010]
    Mine too - maybe remaps lower their life expectancy? But at least once you know what it is it's an affordable easy fix! Go to Audi and they will have you replacing coil packs, MAF, etc etc etc!!
    #15
  17. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 14, 2010]
    When I went to Audi and ordered the valve, he knew exactly what the problem was. He said its a common problem.
    #16
  18. CHRIS555
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    CHRIS555 DOPE with added OCD

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    [Sep 14, 2010]
    Thats what they said to me as well, I think they say that when you order a specific part, but had they used VAG-COM they would follow a diagnostic / fault find procedure and the valve is far far down the list! I think blackpool1974 who helped me solve this when i had it spent the best part of £400-500 with Audi and eventually used a Audi Master Technician - ouch!
    #17
  19. itsmeagain
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    itsmeagain 1.8T Sport Cabriolet

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    [Sep 14, 2010]
    I think Audi start at the most expensive parts first. Mine cost me 4 coil packs and then finally the valve. LOL
    #18
  20. bowen
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    bowen Member

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    [Nov 16, 2011]
    Hi guys,

    sorry to bump this, but im replacing my crankcase breather valve this weekend. Looking at docurley's pic, i can see the oil filter and the pipe that goes nowhere next to it but for the life of me i cant find the valve that im looking to replace!

    can someone literaly draw me a picture?
    #19
  21. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Nov 16, 2011]
    I'll have a look on Elsawin, what engine do you have?
    #20
  22. bowen
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    bowen Member

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    [Nov 17, 2011]
    1.8t, thanks.

    Got the same syptoms, suction through dip stick, high idle code and lean code hope this is the fix!
    #21
  23. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Nov 17, 2011]
    #22
    bowen likes this.
  24. olly quattro
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    olly quattro Member

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    [Nov 28, 2011]
    Last edited: Nov 28, 2011
    #23
  25. bowen
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    bowen Member

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    [Nov 28, 2011]
    Forgot to update but thanks I have fixed this. The etka was really helpful thanks!
    #24
  26. scottshere
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    scottshere Member

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    [Jan 26, 2012]
    Hi, sorry to bump this old post, but im told my problem with oil leaking around the EGR area and down the engine might be the crank case breather
    Anyone got some pics of location and how to change on 1.9tdi ?
    #25
  27. chamorro_3
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    chamorro_3 New Member

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    [Feb 20, 2012]
    I was trying to knock this out and ran into a problem or i am just not getting this. I purchased the 034 bleeder valve, but where #6 in the diagram, i have a breather/PVC valve. It has the stem that runs off of the valve with a hose connected to it. Am i just reading this thread wrong?
    #26
  28. chamorro_3
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    chamorro_3 New Member

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    [Feb 21, 2012]
    #27
  29. scottshere
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    scottshere Member

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    [Feb 21, 2012]
    Anyone have pics of location on 1.9TDI?
    #28
  30. BKZ187
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    BKZ187 Member

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    [Apr 10, 2012]
    how much is this part from TPS?
    #29
  31. olly quattro
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    olly quattro Member

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    [Apr 10, 2012]
    less that £10 if i remeber correctly
    #30
  32. BKZ187
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    BKZ187 Member

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    [Apr 10, 2012]
    just ordered it for a separate crankcase pressure issue i am having on my 1.8T 190

    i also have a 1.9TDi 130 that judders slightly at idle - could this valve also be the cause in a diesel?
    #31
  33. Dubbers1
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    Dubbers1 Top Gear

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    [Jan 25, 2013]
    I changed mine on my car last night, massive difference, all idle issues have now disappeared

    Well worth doing if you havent yet, was only £9 something from Audi Dealership and only took 10mins tops

    Mine was completely collapsed in too
    #32
  34. scottshere
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    scottshere Member

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    [Jan 25, 2013]
    I still cant find it on the 1.9TDI
    #33
  35. jazzza
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    jazzza New Member

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    [Mar 9, 2013]
    is that the breather just above the oil filter and between tho two clips ? thanks
    #34
  36. jp1
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    jp1 New Member

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    [Apr 4, 2013]
    One question guys. How difficult is it to replace the crankcase ventilation valve?? I have the 1.8T 190

    I have read all the threads about it, but what I am concerned about is working space.

    I replaced the crankshaft sensor from the top a year ago or so, by removing the expansion tank, This was not that easy as trying to find the sensor was pretty hard from the top!!

    Is this an easier job?

    Cheers


    BTW, I have had the problem for over 4k miles, but was living with it. Took it to the garage to fix it today as it had stalled and was then difficult to start a few times over the last week. Garage ended up just changing crankcase sensor as apparently after I dropped it off, the car then wouldn't start. So £150 later I still have the same problem.

    Now that I have found out the exact cause (I can hear hissing around the PRV, pipework etc and the oil filler cap is being held closed with a lot of suction, exactly as others have described). Thought I would do it myself rather than paying out another £150
    #35
  37. czm
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    czm Member

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    [Apr 4, 2013]
    Its pretty easy to do m8 tbh

    Some say moving the coolant bottle makes it easier but I did mine in 10mins without moving it.

    Just make sure you have some new jubilee clips and give it a go.
    #36
  38. Dubbers1
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    Dubbers1 Top Gear

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    [Apr 5, 2013]
    ^^ This

    I moved my coolant bottle out of the way though because its only one screw and I couldnt get my hands in there without doing it
    #37
  39. Ian2012
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    Ian2012 Active Member

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    [Aug 24, 2013]
    Do you know what some things really don't change 20 years ago i was cleaning out **** from the breathing system of 5 cylinder audi engines, all blocked up and nasty and pulling a little domed piece of metal housing off the block and un blocking the hole with a wire coat hanger. Fast forward to present day, had cause to replace G62 sender on a 1.8 t, total twat of a job ended up removing breather pipe that runs alongside the top of the engine hmm lookey here it's all full of the same old crud and the valve as well, all cleaned out quite surprised as to the difference in how it drives now
    #38

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