JMB RetrofitsAH Fabrications
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  1. #1
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    What is this bit on my a4 b5 1.8QTS

    Hey all
    So I have my lovely A4 QTS.
    I did the timing belt myself on Saturday, the only proplems to report were:
    snapped bolt on the headlight (came off in my hand guv)
    and...the reason im writing this...snapped noggin on the watsit
    There is a small thin flexible pipe that goes from the top of the engine )(turbo related I think), accross the engine and down to this round plastic junction in the fat hose beneath the right headlight.

    I need to know what this 'thing' is in order to order one, also if any harm will come from driving the car untill this is sorted.


    Jay
    Last edited by Snow; 1st June 2009 at 20:57.
    A4 1.8T Quattro Sport

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  3. #2
    "Stick a V8 in it!"

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    can you get a pic? Its either boost or vacuum related or perhaps an oil breather. I wouldnt want to drive the car until you get it fixed though without knowing exactly what it is.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
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  4. #3
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    pic link

    http://cid-d7f5a68e6326c3f9.skydrive...%7C4s/Pipe.jpg

    Ive been looking into it a bit more and i think its may be either wastgate or BOV.
    A4 1.8T Quattro Sport

  5. #4
    Broken Byzan's Avatar
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    Sounds like the DV pipe, and as long as you not boosting like crazy it will be ok short term Just go for a 710N

  6. #5
    "Stick a V8 in it!"

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    compressor stall on a K03 is not going to go down well, so if you do drive it, be VERY gentle with it until you replace the pipe

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  7. #6
    jcb
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    its a vaccum signal pipe come off the bottom of the inlet manifold.
    get your camera phone and take a pic from under neath, bet there is a skinny pipe with nothing on it

  8. #7
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    Finally...this is the bit, cut off valve according to Audi...Although he did just have a good guess. Ive sent him the pic too for identification.

    http://cid-d7f5a68e6326c3f9.skydrive.live.com/self.aspx/just%20random%20sum%20pic%7C4s/a4b5%201.jpg

    Can I replace this with an aftermarket part for better performance or am I better off sticking with the Audi part?

    what does this do and will it damage my engine...Ive been VERY very gentle with it today...boring but with the bonus of 35 - 40mpg
    Still..rather the fast than the economical

    Jay
    A4 1.8T Quattro Sport

  9. #8
    Broken Byzan's Avatar
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    Yep thats your diverter valve, get a TT one AKA 710N, its upgrade, and a shade over 20

  10. #9
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    Nice one Mark.
    I assume I can grab one of those TT diverter valve 710N at the stealer. Any other trick parts I can replace while im at it?
    Ta
    Jay
    A4 1.8T Quattro Sport

  11. #10
    "Stick a V8 in it!"

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    Yep, main dealer part, just ask for a diverter/dump valve for a 225bhp TT.

    The part number is:
    06A145710N
    cut-off valve

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  12. #11
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    You can replace the N75 valve with a N75J valve while your at it.
    Black Audi RS4 2006 Exclusive edition, Black optic option (stock for now)

 

 

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