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  1. #1
    Established Member Two Rings
    Join Date
    Feb 07 2006
    AZ Member #
    10137
    Location
    Boston MA

    PCV Valve, Breather Tube, & Gasket Replacement

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    PCV DIY

    This is for my 2006 2.0T engine.



    I thought it would be a good idea to make a DIY for the PCV. I looked around and could not find one. And I needed to replace the one in my car. I also replaced the Breather Tube while I was there.
    This is the kit.





    Parts needed:

    PCV and Gasket
    Breather Tube and Gasket
    Hose Clamp (the kit does not bring one) buy it separate.

    I bought a full kit from Europarts.




    Tools needed:

    Torx T25 I started with a ratchet bit but then ended up using a Torx T handle which was better for this application.
    Flat head screwdriver I used a few different sizes.
    Rags or shop towels
    Phillips screwdriver
    5 mm hex L shape bit
    Large Pliers




    Start by taking off the engine cover. The PCV valve is located top right.


    Here is the hardest part of the job. Removing the two hoses that attach to the Valve.

    The clip that hold the first hose attach to the valve needs to be squeeze on the top and bottom at the same time pushing away from the valve to come off. I used a flat screwdriver in between the valve and hoses pushing away from the valve. The second hose under the first one is a little more difficult. I used a small flathead screwdriver to pry both sides pushing and top and bottom then pushing away from the valve. Caution be very careful prying and pushing, the clips can break.

    Now you can remove the four Screws that attach the valve to the valve cover. I found that using the Torx T handle was better and it does not take much effort to remove the screws.

    The PCV valve comes of easily.

    This is how it looks like after removing the valve. Once the valve is remove you will see the gasket and you can remove it. I used a small flathead screwdriver prying by the sides. Again be careful.

    Now you can replace the gasket after wiping the area where the gasket goes with a rag.

    Now it’s just put on the new valve and hoses making sure that the hoses clip back on. And it should look like this.




    Now for the Breather Tube.


    It’s located under the Air Intake piping on the left side on the engine.


    You will need to remove the piping, remove the two screws with a Phillips head screw driver located on the front of the core support.

    It will look like this.

    And here is the Breather Tube.


    I remove the rubber air intake hoses that attaches to the turbo inlet to make easier access to the bolts that need to be remove. You will need to use a large pliers to remove the clamps.

    Make sure to put something to cover the inlet hole, I used some shop towels you don’t want anything going down that tube.

    These are the bolts that need to be removed. Note that the heat shield rap for the wire will need to be slightly move to the side to get to the bolt.


    This is where it gets tricky, I tried using a 5 mm hex ratchet bit, but there wasn’t enough space for it. I ended up using a regular 5 mm L shape hex. I also used a wrench to use as leverage and it work out perfect.

    This is how it works.

    Now remove the hoses clamp. Just pry the clamp end with a flathead screw driver and pull up and off with a plier.


    Now just remove the tube. You will see that the new tube has a notch and the gasket has a little notch that needs to be aligned. Also note that the gasket has notches where the screws go.


    I found that putting the gasket on the tube and using the screws to hold it in place works better that trying to put the gasket on once you have the tube in place.

    Also once the gasket is in place it easier to connect the tube to the top hose and then swing it down into place.

    Tighten up the bolts the same way you took them off. Now get a new hose clamp and clamp the hose to the tube. The kit does not bring one. Put everything back on. And you are done.

    Note If you took off the negative battery terminal like I did, (it’s not needed) make sure that you have the Radio Code and also note that the Esp light will remain turn on until you drive the car a few feet.

    That’s all.
    Last edited by audi[]viruz; 03-20-2011 at 08:53 AM.

  2. #2
    Veteran Member Four Rings Mc Suly's Avatar
    Join Date
    Aug 20 2010
    AZ Member #
    62978
    My Garage
    AUDI B7 SLWPKE
    Location
    MONTREAL, QC, CANADA

    Good work; Keep it up!

    Include the year too! Aren't there a difference in some years of version 1 or 2 or something!??!
    frankenTurbo

  3. #3
    Veteran Member Four Rings Leo14's Avatar
    Join Date
    Mar 09 2010
    AZ Member #
    55790
    Location
    North E. Jerz

    Nice write up man
    RIP QG TI B7 A4

  4. #4
    Established Member Two Rings RingLeader's Avatar
    Join Date
    Jul 20 2010
    AZ Member #
    61697
    My Garage
    2007 A4 2.0t 1995 Passat VR6(gone)
    Location
    Huntington, New York

    What sympotoms where you experienceing since you figured you had to replace the part? I just got back from audi the tech told me I dident need a pcv or my engine would be whisteling even though im burning more oil then KFC, and my oil gets Black and dirty fast.

  5. #5
    Senior Member Four Rings Inked's Avatar
    Join Date
    Dec 11 2010
    AZ Member #
    68124
    My Garage
    Polaris Outlaw 525 Quad
    Location
    Central FL

    holy crap wash your engine!

  6. #6
    Established Member Two Rings
    Join Date
    Feb 07 2006
    AZ Member #
    10137
    Location
    Boston MA

    RingLeader, well I got a check engine light and had erratic RPM's. You will need to scan for codes and see what comes up. My code was P0507.

  7. #7
    Established Member Two Rings
    Join Date
    Feb 07 2006
    AZ Member #
    10137
    Location
    Boston MA

    Quote Originally Posted by Inked View Post
    holy crap wash your engine!
    Yeah I know, I'm waiting for better weather.

  8. #8
    Veteran Member Four Rings Leo14's Avatar
    Join Date
    Mar 09 2010
    AZ Member #
    55790
    Location
    North E. Jerz

    Quote Originally Posted by RingLeader View Post
    What sympotoms where you experienceing since you figured you had to replace the part? I just got back from audi the tech told me I dident need a pcv or my engine would be whisteling even though im burning more oil then KFC, and my oil gets Black and dirty fast.
    Depending on dealerships, they won't replace a part unless you have a CEL, or something like that.. If you're burning oil a lot, most likely it is. Because that's how my car showed signs of a faulty PCV.. I went from 1000 miles to needing a quart, than to 900,800, 600, 500, 400, than PCV failed. The whistling is at HIGH RPM's btw

    *EDIT* Oh, and also.. Try to take off the oil cap WHILE the engine is running. If it is hard to take off, and it feels as if there is suction.. Than your PCV is failing. When mine failed, erratic RPM's as said above and my car stalled. Twice, I didn't make it 10 feet out of my driveway.
    RIP QG TI B7 A4

  9. #9
    Established Member Two Rings daudic's Avatar
    Join Date
    Jul 06 2009
    AZ Member #
    44647
    My Garage
    2004 Honda Odyssey work horse! 1985 Yamaha Vmax!
    Location
    Lancaster/Ohio

    How does the metal tube fit in?

  10. #10
    Established Member Two Rings
    Join Date
    Feb 07 2006
    AZ Member #
    10137
    Location
    Boston MA

    Breather Tube update.

  11. #11
    Veteran Member Three Rings
    Join Date
    Oct 31 2006
    AZ Member #
    13010
    Location
    TX
    Items for Sale

    Excellent write up. I just did the repair, 30 minutes max. Thanks!!
    2012 Glacier White Q7 Prestige SLine / 2005 Arctic White S4
    Previous: 2007 Brilliant Black A4 Avant 2.0T, 2002 Brilliant Black A4 1.8T

  12. #12
    Active Member One Ring
    Join Date
    Jul 16 2013
    AZ Member #
    119033
    My Garage
    2008 A4 Avant 2.0T 6MT Sold: 2003 A4 1.8T CVT
    Location
    Glen Ridge, NJ

    I am in the middle of this and just broke the clip on the second (lower) hose that connects to the PCV valve. Anyone know if I need to replace it? Thanks

  13. #13
    Active Member One Ring
    Join Date
    Jul 16 2013
    AZ Member #
    119033
    My Garage
    2008 A4 Avant 2.0T 6MT Sold: 2003 A4 1.8T CVT
    Location
    Glen Ridge, NJ

    Actually, it still clipped in. Noise is all fixed! Thanks for this DIY. Very helpful.

  14. #14
    Senior Member Three Rings Italiano's Avatar
    Join Date
    Jul 27 2009
    AZ Member #
    45569
    My Garage
    2006 B7, 1979 Corvette, Mini Copper
    Location
    Charleston, SC
    Items for Sale

    Just wanted to thank you audi[]viruz for the DIY. Did this last night, simple super clear and fix the rough idle/CEU/boost issue is was having!
    Stasis Street Sport Coilovers ll Stasis Catback Exhaust ll RS4 Rear Sway Bar ll RS4 Black-out grille with filler plate ll JHM short shifter ll Carbon Fiber rear diffuser ll 30% tint all the way around ll ATP Test Pipe ll K&N Drop in Filter ll APR Stage II Tune ll Upgraded DV ll Red Coil Packs

  15. #15
    Established Member Two Rings A4Amit's Avatar
    Join Date
    Aug 31 2013
    AZ Member #
    122188
    My Garage
    2007 A4 6MT - 034 Snub Mount 034 Snub Bracket RS4 Bumper & Grille - SOLD
    Location
    Westlake Village, CA

    Thanks for the diy! Helped me change out my parts. Very straight forward. Big thumbs up!!!
    2007 A4 6MT - 034 Snub Mount 034 Snub Bracket RS4 Bumper & Grille, 155K miles- SOLD

  16. #16
    Established Member Two Rings TPW's Avatar
    Join Date
    Jul 28 2013
    AZ Member #
    119820
    My Garage
    93 Mustang Cobra, 09 Jetta Sportwagen
    Location
    Ojai, CA

    Excellent DIY! Helped me installing my new valve cover.

  17. #17
    Established Member Two Rings
    Join Date
    Sep 11 2009
    AZ Member #
    47628
    My Garage
    A4 B7 2.0T MT, A4 B5 1.8 MT
    Location
    South Africa

    Can someone please tell me, why is it necessary to replace the breather tube? What can go wrong with it?

  18. #18
    Active Member Two Rings SilentAngle's Avatar
    Join Date
    Oct 24 2011
    AZ Member #
    82966
    My Garage
    W203 C-240 4M, 06 Volvo XC70
    Location
    Lancaster

    Quote Originally Posted by marlboro View Post
    Can someone please tell me, why is it necessary to replace the breather tube? What can go wrong with it?
    I didnt, but I'm still getting nasty amounts of smoke and misfires intermittently. This is on my agenda for tomorrow.
    B7 A4 2.0T quattro 6-spd S-line



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