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AFN TDi vac pipes recomendations

Discussion in 'A4/S4 forum(B5 Chassis)' started by jbh, Jan 9, 2014.

  1. jbh
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    jbh TDi lover

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    [Jan 9, 2014]
    right im planning on replacing all the vac pipes on both the avants and the leak off pipes.
    now Ive seen folk using the silicon ones wheres the best place to get them and what exactly do I need.
    #1
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  3. Sulli79
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    Sulli79 Active Member

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    [Jan 9, 2014]
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  4. jbh
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    jbh TDi lover

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    [Jan 9, 2014]
    that ones for the 1.8t not sure if the 1.9 tdi would be the same.
    #3
  5. TeKnodriver
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    TeKnodriver Biodiesel Purrrr

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    [Jan 11, 2014]
    kit looks expensive for a bit of tubing...
    I just bought 2m of 4mm internal diameter silicone for about £4.50.
    the plastic connectors and T-pices in the kit should alreadt be in the engine bay on the old tubing, it is unlikely they would be degraded.

    test the black and white one-way-valve or check-valve that is between the vacuum accumulator ball and the tube that links to the EGR control solenoid.
    it should hold vacuum when applied to white end but allow air through if vacuum is on black end.
    (I did this by sucking on it but not recommended as it may have oil etc inside it - shouldn't but you never know)
    I still had vacuum loss in the system after replacing old tubing,
    my check-valve was allowing air through in both directions.
    Part is 046 905 291 A - £15.30

    Check connection of tubing to the previously mentioned ball.
    there could be vacuum loss there
    #4
  6. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Jan 12, 2014]
    The black silicone hoses are fine off eBay.
    I've been using them for months now with no issues.
    There no need to replace the plastic bits unless you snapped them.
    #5

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