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  1. #1
    Established Member Two Rings
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    Feb 07 2006
    AZ Member #
    10137
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    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 ¼ 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
    B7 RS4
    Location
    Québec

    Good work; Keep it up!

    Include the year too! Aren't there a difference in some years of version 1 or 2 or something!??!
    B7 RS4

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

    Nice write up man
    RIP QG TI B7 A4

  4. #4
    Established Member Two Rings RingLeader's Avatar
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    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
    Veteran Member Four Rings Inked's Avatar
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    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
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    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
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    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
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    Mar 09 2010
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    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
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    Jul 06 2009
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    44647
    My Garage
    2007 A8l. 2003 TT Roadster. 1985 Yamaha Vmax!
    Location
    Lancaster/Ohio

    How does the metal tube fit in?

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

    Breather Tube update.

  11. #11
    Veteran Member Three Rings
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    Oct 31 2006
    AZ Member #
    13010
    Location
    San Antonio, TX

    Excellent write up. I just did the repair, 30 minutes max. Thanks!!
    Current: 2016 S6 Previous: 2015 A6, 2012 Q7 Prestige SLine, 2005 S4, 2007 Avant 2.0T, 2002 A4 1.8T

  12. #12
    Junior Member Two Rings
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    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
    Junior Member Two Rings
    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
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    Jul 27 2009
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    45569
    My Garage
    2012 BMW X5, 1979 Corvette
    Location
    Charleston, SC

    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!
    2014 S4 (B8.5) APR Stage II+ ll APR Pulley upgrade ll APR Exhaust ll APR TCU Upgrade ll 20% tint

  15. #15
    Senior Member Two Rings A4Amit's Avatar
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    Aug 31 2013
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    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
    Senior Member Two Rings TPW's Avatar
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    Jul 28 2013
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    My Garage
    09 Jetta Sportwagen
    Location
    Ojai, CA

    Excellent DIY! Helped me installing my new valve cover.

  17. #17
    Senior Member Three Rings
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    Sep 11 2009
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    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
    Established Member Two Rings SilentAngle's Avatar
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    Oct 24 2011
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    W203 C-240 4M, 06 Volvo XC70
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    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

  19. #19
    Established Member Two Rings
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    Jul 13 2014
    AZ Member #
    263806
    My Garage
    2013 Jeep Wrangler unlimited
    Location
    New Tecumseth, Ontario Canada

    PCV Valve, Breather Tube, & Gasket Replacement

    Quote Originally Posted by Leo14 View Post
    Depending on

    *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.
    I am reading that suction is good when oil cap is removed that means there are no leaks and the hoses are not plugged. However if nothing happens that means the valve is faulty.




    Sent from my iPhone using Tapatalk

  20. #20
    Veteran Member Three Rings mgfranz's Avatar
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    Apr 08 2016
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    371519
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    Mission Viejo, CA

    Quote Originally Posted by audi[]viruz View Post
    PCV DIY
    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.
    Just a piece of advice, if you do not have a magnetic tip attachment to remove these screws, be prepared to loose 1 or 2... primarily the lower screw. If you drop it, it ends up in the belly pan. I used a hex drive with the 25torx bit which worked great, but lost the lower screw upon removal. (I have large and fat finger hands). I had a spare so no big deal, but upon re-installation I didn't want to run into the same problem of losing a screw, so I added a drop of RTV to the housing where each screw went before installation and let it sit for 5 min then ran each screw into the housing before placing the part in place. This way I knew the screws were not going anywhere.
    2008 Audi B7
    2003 Ford F250 XLT
    2001 Porsche Boxster
    1999 BMW 740i M-Sport GONE

  21. #21
    Veteran Member Three Rings Kingzilla17's Avatar
    Join Date
    May 05 2011
    AZ Member #
    75090
    Location
    Arlington, Texas

    Just replaced both on my 06 today. I have a check engine light and codes P0507 and P0161. Hopefully this will resolve that. Anyone know about how long it would take for the light to reset after doing repairs or do I have to do it manually?

  22. #22
    Veteran Member Three Rings
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    Apr 24 2016
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    California

    Quote Originally Posted by Kingzilla17 View Post
    Just replaced both on my 06 today. I have a check engine light and codes P0507 and P0161. Hopefully this will resolve that. Anyone know about how long it would take for the light to reset after doing repairs or do I have to do it manually?
    20 consecutive run cycles without throwing a code I believe (maybe its more I could be wrong).


    Sent from my iPhone using Audizine mobile app
    2005.5 A4Q 2.0T 6MT JHM 2+, Autotech internals, CTS front mount, GFB DV+, 034 Street Density mounts + snub, H&R coilovers, B7 Recaros, Phil's V4's, maybe a k04 soon?

  23. #23
    Veteran Member Three Rings Kingzilla17's Avatar
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    May 05 2011
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    Arlington, Texas

    Quote Originally Posted by RakkCity View Post
    20 consecutive run cycles without throwing a code I believe (maybe its more I could be wrong).


    Sent from my iPhone using Audizine mobile app
    Appreciate the response. I had the car scanned and I dropped the codes but now have a P0299- turbo underboost code. Just got done rechecking everything so hopefully that second check fixes something I might have missed. If not then I have no clue. Any suggestions on other things that may cause a P0299 code are welcomed Incase it comes back. Thank you.

  24. #24
    Established Member Two Rings Gerblack's Avatar
    Join Date
    Feb 15 2006
    AZ Member #
    10309
    My Garage
    2006 A4Q,tip 2.0TMarch 19
    Location
    Memphis, TN

    Quote Originally Posted by Kingzilla17 View Post
    Appreciate the response. I had the car scanned and I dropped the codes but now have a P0299- turbo underboost code. Just got done rechecking everything so hopefully that second check fixes something I might have missed. If not then I have no clue. Any suggestions on other things that may cause a P0299 code are welcomed Incase it comes back. Thank you.
    Same problem here it is a Diverter Valve fail.
    I live the life I love I love the life I live.
    AH-64D ATTACK baby

  25. #25
    Veteran Member Three Rings mgfranz's Avatar
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    Apr 08 2016
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    Mission Viejo, CA

    Quote Originally Posted by Gerblack View Post
    Same problem here it is a Diverter Valve fail.
    If you replace the DVD, go with GFB+ DV, you will never have that problem again.
    2008 Audi B7
    2003 Ford F250 XLT
    2001 Porsche Boxster
    1999 BMW 740i M-Sport GONE

  26. #26
    Established Member Two Rings Gerblack's Avatar
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    Feb 15 2006
    AZ Member #
    10309
    My Garage
    2006 A4Q,tip 2.0TMarch 19
    Location
    Memphis, TN

    Quote Originally Posted by mgfranz View Post
    If you replace the DVD, go with GFB+ DV, you will never have that problem again.
    Wish I saw this before I bought the revised D DV. I may get this and add it later any way thanks for the info.
    I live the life I love I love the life I live.
    AH-64D ATTACK baby

  27. #27
    Established Member Two Rings
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    Apr 14 2008
    AZ Member #
    27700
    My Garage
    '18 A6 3.0 Prestige, '14 A6 3.0 TDI, '17 Q5 3.0
    Location
    NY

    Someone asked this earlier, what goes bad with the tube, is the new one an update (kind of expensive if you don't need it)? Be careful with the VIN split/production date cut off, the valve and tube are different part numbers depending on early or late. My dealer gave me the wrong one, and the wrong center exhaust clamp too, even though I show them the VIN when I order parts. I have a P0455 code that still pops up a while after clearing the codes, a mechanic at Audi said to try the breather valve (??) after already changing the gas cap, DV, and N80, I think I need to smoke test it.

  28. #28
    Junior Member Two Rings
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    Oct 05 2015
    AZ Member #
    359892
    Location
    Chicago/IL

    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?
    There is a valve inside the tube it will allow for air to travel one way but not the other. Over time this seal will stop blocking air flowing the opposite way. It might not be necessary to replace it but if you replace your pcv valve you might as well replace the tube. If you want to save some money you can take it off and blow through both ends and notice if the valve inside is working properly.

  29. #29
    Veteran Member Four Rings Sly Raskal's Avatar
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    Jan 22 2007
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    15043
    Location
    Fontana, CA

    The PCV replacement looks very simple, thanks for the write-up. My only question is do the torx bolts for the PCV need to be torqued down to a specific amount?
    -Anil

    2019 A4 Sedan, Nardo Gray, 45TFSI, Prestige Plus, S-Line, Quattro, Black-Optic, PPF, Ceramic Paint Coating, Ceramic Tint, Audi Black Door Handle Kit

  30. #30
    Account Terminated Four Rings
    Join Date
    Apr 30 2017
    AZ Member #
    398712
    Location
    Los Angeles

    Yes, make sure you do not over tighten them or you'll be buying a new valve cover.

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