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Whats this part? (pic included)

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by Alan H, Sep 25, 2010.

  1. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    Hi all,

    Could someone tell me what this bit is?

    [​IMG]

    Sorry about the image quality, I took it with my iPhone


    I've removed it today and it was full (well it had some) of a brown liquid in it, it looks all gunked up.

    Will it be OK to clean out with some carb cleaner?

    TIA,

    Alan
    Last edited: Sep 25, 2010
    #1
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  3. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Sep 25, 2010]
    Is it the crankcase breather? Its a bit hard to tell from the closeness of the pic!

    On what engine?
    #2
  4. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    It's on the 1.8T

    It's situated just above the turbo and it's plugged into the hose that comes off the maf sensor....
    #3
  5. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    I've taken it off and it's got a spring inside it.....
    #4
  6. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    Oh, and I disconnected the maf sensor, and the ESP light came on when I drove it.

    It went off when I reconnected it though.... should this happen?
    #5
  7. simon.m
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    simon.m Active Member

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    [Sep 25, 2010]
    id say james hit it on the head its a crankcase breather by the looks and sound of it dont bother cleaning it buy a new one mate
    #6
  8. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    I've just been hunting on the net, it is the crank breather.....

    I just don't seem to have any boost. But since I've disconnected the maf sensor and reconnected it it seems to be boosting better.

    Or is that just me thinking it feels better??? lol
    #7
  9. simon.m
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    simon.m Active Member

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    [Sep 25, 2010]
    no the maf can kill the boost it maybe that you had dry conictors think i spelt that right lol so maybe ok now if not you may need a new one mate
    about 50 pounds i think
    #8
  10. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    Just drove the car to Sainsbury's, and the car is loads better. You can hear the turbo whistling and all that. Do you think I should clean the connectors?


    Sent from my iPhone using Tapatalk
    #9
  11. simon.m
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    simon.m Active Member

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    [Sep 25, 2010]
    cant hurt to mate more so before you buy a new maf sensor and see how it goes i had this and the first time it was the maf then it was the n75 valve
    #10
  12. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    Where is the N75 valve located? and what does it do?

    I've been out in the car again, it's completely different..... acceleration, mid range everything is so much better.

    It's getting plugged in at some point this week just to get checked out......
    #11
  13. simon.m
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    simon.m Active Member

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    [Sep 25, 2010]
    on the tdi its just behind the drivers headlight mate im not the best person to ask about the petrol ones as it maybe some where else
    #12
  14. Alan H
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    Alan H Need a V8 or Bi-Turbo.......

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    [Sep 25, 2010]
    Thanks Simon....

    VAG engines are all new to me.

    Can anyone tell me the location of the N75 on the 1.8T
    #13
  15. Tooks
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    Tooks Active Member

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    [Sep 26, 2010]
    It's in a similar place on the 1.8t, behind the drivers headlight, but lower down.

    You can see it from the top, but it's mor accessible from underneath the car with the undertray removed.
    #14

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