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Turbo Whistle

Discussion in 'A4/S4 forum(B5 Chassis)' started by ScottD3, Apr 18, 2011.

  1. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Apr 18, 2011]
    When I got my 1.9 TDI (AFN) I could hear the turbo whistle really loudly but over the months it got really quiet, now its starting to come back.

    Are you meant to hear it or not?

    Could someone please explaine it?
    Thanks.
    #1
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  3. rossbrownlee
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    rossbrownlee Ross_S4

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    [Apr 20, 2011]
    Bump for this, I can also hear mine now whereas I couldn't before, and would be interested to know if you should or not.
    #2
  4. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Apr 20, 2011]
    I'm sure when mine was standard it was very quiet. With a modded airbox and remap it has got louder. Has your turbo got louder then quieter then louder again without any mods???
    #3
  5. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Apr 20, 2011]
    mine has.
    It was loud when I got it, so loud my mate could hear it in his car be hind me.

    it went away for a couple of months but its come back. its quieter than before though.
    #4
  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Apr 20, 2011]
    probably a leak?
    #5
  7. AR-rkon
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    AR-rkon AllROOOOOOOOOAD!!! Staff Member Moderator Regional Rep

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    [Apr 21, 2011]
    check all the hoses leading out of the turbo, through the IC and upto the inlet... if theres al leak, thats the area most likely to be causing a whistling noise.
    #6
  8. ScottD3
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    ScottD3 I want your faulty electronics Supporter

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    [Apr 21, 2011]
    I checked all pipes, tubes, cables.
    I removed alot of the smaller pipe work and all the main hoses are fine, No issues.
    #7
  9. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Apr 22, 2011]
    Try pressure testing the inlet system.

    May be a split intercooler or a hard to see hose split for instance.
    #8

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