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Bearing noise when setting off in first gear is it my turbo?

Discussion in 'A3/S3 Forum (8L Chassis)' started by Dj Vegas, Nov 15, 2011.

  1. Dj Vegas
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    Dj Vegas Member

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    [Nov 15, 2011]
    when i first start my car in the morning i set off in first gear and it sounds to me like my turbo bearings is on its way out
    any body had a similar problem with turbos?
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  3. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Nov 15, 2011]
    Can you replicate the noise in any other gear? does it only do it when the car is cold/warming up?
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  4. Dj Vegas
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    Dj Vegas Member

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    [Nov 15, 2011]
    only first thing in the morning then fine does it a little in second gear
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  5. Dj Vegas
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    Dj Vegas Member

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    [Nov 15, 2011]
    yes cold / warming up
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  6. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Nov 15, 2011]
    Could well be the turbo then just before the oil warms up around the bearing. Do you know if it's the original turbo and how many miles it's done?
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  7. Dj Vegas
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    Dj Vegas Member

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    [Nov 15, 2011]
    i would think so but not really sure im having a bit of bad luck atm haha its done 140'000 thousand miles so quite a few but drives like a dream to say its done that many i have installed the ebay FMIC do think that the N75 valve could be to small?
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  8. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Nov 15, 2011]
    If you have full service history and cant find anything to say the turbo has ever been changed then it's had a good life! Unless you start to get blue smoke out the exhaust or this noise gets really bad I wouldn't worry too much.
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  9. camscockle20vT
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    camscockle20vT The stigs ugly brother

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    [Nov 15, 2011]
    I agree with westy, but to add to your dilema i would ask, do you wait atleast 30 seconds before turning your engine off?
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  10. Dj Vegas
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    Dj Vegas Member

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    [Nov 15, 2011]
    yes i leave engine running foe 30 secs cheers westy
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  11. Lee172
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    Lee172 GT3071

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    [Nov 15, 2011]
    I dont understand why the problem would be the turbo if its in first gear only. Do you let your car idle for a minute in the morning or drive stright away?
    #10
  12. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Nov 15, 2011]
    Are you sure its not the secondary air pump you can hear?
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  13. a3tdi2001
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    a3tdi2001 Member

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    [Nov 15, 2011]
    Have you considered your gearbox? Does it make the noise when stationary? Could be worth a change of gearbox oil?
    #12
  14. Mike B
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    Mike B Member

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    [Nov 15, 2011]
    Agree if its the turbo it would do it if you revved in neutral if not g/box oil may be low or nedd changing
    #13
  15. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Nov 15, 2011]
    Define this noise... K0x turbos have a journal bearing so I am not sure if they would make a 'noise' and if the bearing was that worn it would be noticable in performance terms...

    Ball bearing turbo's like Garrett GT's do make a rather nasty noise when they are about to let go having experienced one do exactly that on the dyno once...

    You can check for wear by taking off the TIP and trying for play in the shaft... if you can pull it in and out a lot then thats thrust bearing wear... excessive up and down play will be the journal bearing...

    <tuffty/>
    #14
  16. scott6452
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    scott6452 New Member

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    [Nov 15, 2011]
    I currently have the exact problem described. Just a tinny rattle when the engine is picking up from low revs when cold. As soon as the car heats up the noise is gone. Not sure if it is just a coincidence but my s3 has just turned 130000 miles also with original turbo. No other turbo problems however, apart from a mega boost leak that im sure isnt doing it's life much good.

    Im sure i'd love the car a whole lot more if i could find the source of this bloody noise and get rid of it!
    #15
  17. Inertiauk
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    Inertiauk Member

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    [Nov 15, 2011]
    Mine got a bit noisy like this just before the turbo seals went, its not as noticeable in higher gears because its overpowered by other noises.
    #16
  18. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Nov 15, 2011]
    The noise of a K03 failing is usually described as being like a dentist drill.

    I've noticed my turbo makes a sort of wooooooooo noise predominantly when cold when driving at low load, ie pulling away. I guess you could describe it as "ghosty" noise.
    #17
  19. Dj Vegas
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    Dj Vegas Member

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    [Nov 16, 2011]
    where would you find the secondary air pump?
    #18
  20. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Nov 16, 2011]
    #19

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