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  1. #1
    Veteran Member Three Rings SN95Audi87's Avatar
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    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    PCV System Overhaul - Need Opinions

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    Hey Audizine Family,

    I haven't been on here much. My 2001 Audi 1.8T AWM now has 193k and it is still going strong. I've owned the car for 8 years now but it definitely has some quirks. Ok, let me cut to chase now as you can tell from my title heading. The B5 has been building to much crank case pressure as of lately. I suspected that it was PCV related and it was...I let the problem fester for 3/4 years now out of ignorance of not fully understanding what was going on.

    I replaced my PRV because it looked original but now checking all the hoses/valves, a lot of clamps look factory. Which leads me to my next point. The crankcase breather tube is covered in dirt/oil and some old rubber hose connections. I thought simply replacing the pcv would be a simple fix but looking at the system as whole, im just going to end up with other issues later down the road. ,

    The intake manifold injector seats have dirt/oily residue on it. The oil dipstick is ok but look like it can be replaced and like I said before a lot of hoses/clamps look original. Should I just do a complete top end overhaul?

    The List in head:

    Manifold gasket
    injector seats
    PCV system replacement
    oil dip stick tube
    miscellaneous hoses


    Would it be better to go to specialist or do this all myself? I saw some youtube videos of Audi enthusiasts redoing everything.
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake

  2. #2
    Veteran Member Four Rings GOODBYNAAIR's Avatar
    Join Date
    Nov 17 2011
    AZ Member #
    84082
    My Garage
    1973 MG Midget, 2001.5 1.8T black.
    Location
    Fredneck Maryland

    Quote Originally Posted by SN95Audi87 View Post
    Hey Audizine Family,

    I haven't been on here much. My 2001 Audi 1.8T AWM now has 193k and it is still going strong. I've owned the car for 8 years now but it definitely has some quirks. Ok, let me cut to chase now as you can tell from my title heading. The B5 has been building to much crank case pressure as of lately. I suspected that it was PCV related and it was...I let the problem fester for 3/4 years now out of ignorance of not fully understanding what was going on.

    I replaced my PRV because it looked original but now checking all the hoses/valves, a lot of clamps look factory. Which leads me to my next point. The crankcase breather tube is covered in dirt/oil and some old rubber hose connections. I thought simply replacing the pcv would be a simple fix but looking at the system as whole, im just going to end up with other issues later down the road. ,

    The intake manifold injector seats have dirt/oily residue on it. The oil dipstick is ok but look like it can be replaced and like I said before a lot of hoses/clamps look original. Should I just do a complete top end overhaul?

    The List in head:

    Manifold gasket
    injector seats
    PCV system replacement
    oil dip stick tube
    miscellaneous hoses


    Would it be better to go to specialist or do this all myself? I saw some youtube videos of Audi enthusiasts redoing everything.
    If you have some maniacal skills you should be fine doing this yourself. There are lots of DIYs here and all over the web.

    Look here for all the parts you need. fcpeuro.com
    My A4 Its For sale ---> GT2860 Project
    Tuning from Motoza
    B5 stuff FS
    PCV Dumped on my Driveway

  3. #3
    Veteran Member Three Rings SN95Audi87's Avatar
    Join Date
    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    Quote Originally Posted by GOODBYNAAIR View Post
    If you have some maniacal skills you should be fine doing this yourself. There are lots of DIYs here and all over the web.

    Look here for all the parts you need. fcpeuro.com
    I have a decent mechanical ability. Just the unknown of taking things apart and not being equipped to replace it is a bit daunting.
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake

  4. #4
    Veteran Member Four Rings GOODBYNAAIR's Avatar
    Join Date
    Nov 17 2011
    AZ Member #
    84082
    My Garage
    1973 MG Midget, 2001.5 1.8T black.
    Location
    Fredneck Maryland

    Quote Originally Posted by SN95Audi87 View Post
    I have a decent mechanical ability. Just the unknown of taking things apart and not being equipped to replace it is a bit daunting.
    I understand that, use some painter tape and a marker to mark the parts you remove. Take lots of photos that you can look at when your putting it back together.
    I looks a little crazy under there but its not that bad just take your time.
    Do you have an Audi Repair Manual - Bentley A401 ???
    My A4 Its For sale ---> GT2860 Project
    Tuning from Motoza
    B5 stuff FS
    PCV Dumped on my Driveway

  5. #5
    Veteran Member Three Rings SN95Audi87's Avatar
    Join Date
    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    Quote Originally Posted by GOODBYNAAIR View Post
    I understand that, use some painter tape and a marker to mark the parts you remove. Take lots of photos that you can look at when your putting it back together.
    I looks a little crazy under there but its not that bad just take your time.
    Do you have an Audi Repair Manual - Bentley A401 ???
    I actually don't, I always wanted one.
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake

  6. #6
    Veteran Member Four Rings GOODBYNAAIR's Avatar
    Join Date
    Nov 17 2011
    AZ Member #
    84082
    My Garage
    1973 MG Midget, 2001.5 1.8T black.
    Location
    Fredneck Maryland

    Quote Originally Posted by SN95Audi87 View Post
    I actually don't, I always wanted one.
    With or without it you should be fine. With the money you save by doing it yourself, it may be worth buying one. If you plan to keep the car longer as well or if you plan to own another B5 at some point. You can find them used too. This also means you could sell the book if something happens to the car.

    I have one, its been very helpful.
    My A4 Its For sale ---> GT2860 Project
    Tuning from Motoza
    B5 stuff FS
    PCV Dumped on my Driveway

  7. #7
    Veteran Member Three Rings SN95Audi87's Avatar
    Join Date
    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    Quote Originally Posted by GOODBYNAAIR View Post
    With or without it you should be fine. With the money you save by doing it yourself, it may be worth buying one. If you plan to keep the car longer as well or if you plan to own another B5 at some point. You can find them used too. This also means you could sell the book if something happens to the car.

    I have one, its been very helpful.
    Thanks for the encouragement. I think I will go ahead and buy one with all the parts I'm about to collect.
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake

  8. #8
    Established Member Two Rings
    Join Date
    Aug 19 2010
    AZ Member #
    62919
    Location
    nyc


  9. #9
    Established Member Two Rings
    Join Date
    Aug 19 2010
    AZ Member #
    62919
    Location
    nyc


  10. #10
    Veteran Member Three Rings SN95Audi87's Avatar
    Join Date
    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    Thank you for the expanded view of the parts!
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake

  11. #11
    Veteran Member Four Rings walky_talky20's Avatar
    Join Date
    Jun 30 2008
    AZ Member #
    30427
    Location
    Erie, Pennsylvania

    I did a DIY a while back for simplifying the vacuum and PCV system on the B5 1.8T (Mostly applying to the 2000 and 2001 model years). Even if you don't want to modify anything, it gives a pretty good overview of of the general hookup and function of the parts.

    https://www.audizine.com/forum/showt...Simplification
    Last edited by walky_talky20; 06-12-2018 at 02:20 PM.
    ^Don't listen to this guy, he's not even a mechanic.
    2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, R8 coil packs, Labree HFC & DP, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear, 18" RS4 Reps
    2006 Passion Red Volvo V50 T5 AWD 6MT
    "You need to know what you are doing...Its like a rainbow jungle in there." - Redline380

  12. #12
    Veteran Member Four Rings GOODBYNAAIR's Avatar
    Join Date
    Nov 17 2011
    AZ Member #
    84082
    My Garage
    1973 MG Midget, 2001.5 1.8T black.
    Location
    Fredneck Maryland

    Quote Originally Posted by walky_talky20 View Post
    I did a DIY a while back for simplifying the vacuum and PCV system on the B5 1.8T (Mostly applying to the 2000 and 2001 model years). Even if you don't want to modify anything, it gives a pretty good overview of of the general hookup and function of the parts.

    https://www.audizine.com/forum/showt...Simplification
    I did this and it cleans up a lot of BS. I also dont have a stock car.
    My A4 Its For sale ---> GT2860 Project
    Tuning from Motoza
    B5 stuff FS
    PCV Dumped on my Driveway

  13. #13
    Established Member Four Rings Joe Jr.'s Avatar
    Join Date
    Mar 09 2017
    AZ Member #
    395072
    Location
    Longmont, CO

    yes, try and get this done. I've been messing with my 00 the last year and all those little bs hoses and connections. Its a pita when one of them has a leak or tear. Its just worth pulling the intake manifold off and getting to everything. i also just take lots of pics before taking things apart and during disassembly so if i need to i can go back and see how things were connected and where...I'm hoping to do the clean up that walky mentions on my 01 this summer.

    also just to mention, pulling the injectors out is really pretty easy once you remove the fuel rail screws from the manifold...
    2001 A4 1.8TQM
    2002 VW TDI 5spd

  14. #14
    Veteran Member Three Rings SN95Audi87's Avatar
    Join Date
    Apr 26 2010
    AZ Member #
    58208
    My Garage
    96 Mustang GT, 02 Mustang GT vert, 01.5 Audi 1.8T
    Location
    USA

    Quote Originally Posted by walky_talky20 View Post
    I did a DIY a while back for simplifying the vacuum and PCV system on the B5 1.8T (Mostly applying to the 2000 and 2001 model years). Even if you don't want to modify anything, it gives a pretty good overview of of the general hookup and function of the parts.

    https://www.audizine.com/forum/showt...Simplification
    Quote Originally Posted by GOODBYNAAIR View Post
    I did this and it cleans up a lot of BS. I also dont have a stock car.
    Quote Originally Posted by Joe Jr. View Post
    yes, try and get this done. I've been messing with my 00 the last year and all those little bs hoses and connections. Its a pita when one of them has a leak or tear. Its just worth pulling the intake manifold off and getting to everything. i also just take lots of pics before taking things apart and during disassembly so if i need to i can go back and see how things were connected and where...I'm hoping to do the clean up that walky mentions on my 01 this summer.

    also just to mention, pulling the injectors out is really pretty easy once you remove the fuel rail screws from the manifold...
    Thanks guys! I am going to do this soon. I appreciate the help.
    01.5 1.8T | B6 Sport Wheels | Forge diverter valve | A8/TT Front Brakes | 034 HFC & Milltek Resonated CB | APR TIP & Intake



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