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PCV Valve? Hose replacement.

bbb76 Mar 8, 2018

  1. bbb76

    bbb76 New Member

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    Think this is the PCV - between engine and bulkhead on an APG 1.8 non-turbo:

    audi_PCV.jpg

    The hoses either side of the valve are split and brittle, i'm hoping the trim the damage from the hose ends as a temp fix but does anyone know the internal diameter of the hoses so I can order some silicone replacement?

    Thanks
     
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  3. VAG-Slag

    VAG-Slag Well-Known Member

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    Pretty sure that's the vac hose to the brake booster (i.e little to no bakes if broken!)... And IIRC, it's 13mm ID
     
  4. bbb76

    bbb76 New Member

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    I'll measure the pipe tomorrow when it's light and trace both ends - don't want to loose braking.
     
  5. bbb76

    bbb76 New Member

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    quite right - brake booster OD was 13mm ID was 9.5mm. Was split beyond the valve and is very hard/brittle hoping a hairdryer will soften it bit to get the valve back in and found a length of fuel pipe with a very similar ID that will replace the damaged parts. Fingers crossed this is the vac leak that has been causing some rough running.
     
  6. bbb76

    bbb76 New Member

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    Wasn't able to trim the split sections and rejoin, the pipe was too old, hard and brittle. Got some 10mm ID fuel pipe and after much heating and swearing was able to push the Audi fittings in and re-create the vac pipe. Took it for a drive and the hesitant acceleration is gone along with the lurching when on overrun also the car's not revving when pressing the clutch so fingers crossed that's the only vac leak so far.

    BBFix.jpg

    Also took the opportunity to remove the broken oil filler neck as it's damaged and has made a mess.

    oiladapter.jpg

    OilCap.jpg

    The oil breather pipes are next on the list...
     
  7. bbb76

    bbb76 New Member

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    Seems it's not fixed - another weekend of hunting vaccum leaks.
     

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