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High pitched noise when on high boost

Discussion in 'A3/S3 Forum (8L Chassis)' started by Tim_Attard, Sep 9, 2013.

  1. Tim_Attard
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    Tim_Attard Active Member

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    [Sep 9, 2013]
    Hi guys, ive noticed i get a noise thats quite high pitched when going above 10-12psi boost and stays all the way up to 18psi. it also seems to be getting worse any ideas got a feeling it might be the turbo :( car has done 112k
    #1
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  3. beachbuggy
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    beachbuggy Well-Known Member

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    [Sep 9, 2013]
    failing turbo is a probable cause but ive seen on more than one a boost leak is the issue..
    #2
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  4. Tim_Attard
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    Tim_Attard Active Member

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    [Sep 9, 2013]
    is there anyway to test the turbo? will have a look for leaks, how much would a new turbo be roughly?
    #3
  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 9, 2013]
    Pressure test first of all, and make sure you test it above 12psi!
    #4
  6. Paradox1
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    Paradox1 Active Member

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    [Sep 9, 2013]
    X2 most likely boost leak
    #5
  7. Tim_Attard
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    Tim_Attard Active Member

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    [Sep 14, 2013]
    ok, didn't have a chance to look for a leak and then the dv hose popped of the ic pipping 3rd time its happened now because the nipple on the pipe hasn't got the lip? anyway i can make one? also the turbo is still making the noise its like a whining when it spools not the normal spooling noise so my question how difficult is it to rebuild the turbo? and for that matter taking the turbo off?
    #6
  8. JUS3IN
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    JUS3IN silver sleeper

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    [Sep 15, 2013]
    guessing its an s3? if so looking at 4 hours to remove the turbo first time mate, done from above and through the drivers wheel arch with the driveshaft out the way, one of my posts tells exactly how i done it. new turbo is around 600 quid, best off sourcing a reconditioned one but make sure its a genuine ko4 donning the blue tag as theres alot of chinese copys out there that arnt as good quality like mine! assuming it is actually your turbo off course.
    #7

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