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HELP!!! SOUNDS LIKE IV GOT A SECOND TURBO??

Discussion in 'A3/S3 Forum (8L Chassis)' started by dandos, Apr 19, 2011.

  1. dandos
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    dandos New Member

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    [Apr 19, 2011]
    When I put my foot down, usually from low revs, I get a loud whining sound that is defently not the turbo?? Sounds like it might be a bearing but which one? I don't get the noise when I drive easy.
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  3. Syvo
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    Syvo IF IN DOUBT GO FLAT OUT

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    [Apr 19, 2011]
    is the whining coming from front or rear?
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  4. dandos
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    dandos New Member

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    [Apr 20, 2011]
    It's coming from the front. I thought it was the gearbox, so I ordered a Reconditioned gearbox. Took out my old gearbox and realised not only were the gearboxs different, but the engine mount was dangerously loose and about to slip off??? I put back the old gearbox and tightened up the engine mount best I could, which felt really good and dosent give me any trouble to this day. And with the old box in the noise has gone away??? That was about a month ago and everything was fine until now!! The noise has come back! Not as loud but its there. I thought because the mount had dropped, that it was putting extra strain on the driveshaft?? Help i don't really wanna buy a new gearbox again as it took me a month to get my refund. Any ideas?
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  5. Dane
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    Dane Faster than a V12 Q7

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  6. s3dave
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    s3dave TFSI Hybrid

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    [Apr 20, 2011]
    Thrust bearing would be my first look
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  7. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Apr 20, 2011]
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  8. Dane
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    Dane Faster than a V12 Q7

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    [Apr 20, 2011]
    Shameless plug lol. :jester:

    Your description of the problem does sound fairly similar to my symptoms, fine off boost, but when you put your foot down much louder wooshing turbo noise and where the air from the turbo was escacping from the the pipe it made a whistley whiney whoopie cushion noise.
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  9. dandos
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    dandos New Member

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    [Apr 20, 2011]
    No its defently not the turbo leaking. More likely to be the trust bearing but when I hear the noise I press the clutch and dosent really make much difference. It's only under load.
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  10. dandos
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    dandos New Member

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    [Apr 20, 2011]
    It only happens in 1st and 2nd gears tho??
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  11. dandos
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    dandos New Member

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    [Apr 21, 2011]
    No ideas anybody??
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  12. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Apr 21, 2011]
    It's extremely difficult to give any advice really bud. Can you get a recording of the noise and post it up?

    Also does the sound go away when dipping the clutch?

    Have you had a mechanic look at the wheel bearings?
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  13. dandos
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    dandos New Member

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    [Apr 21, 2011]
    I understand that its difficult to diagnose a noise but the fact I took out the gearbox and replaced it and the noise went away? What could that be?
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  14. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Apr 21, 2011]
    If it only does it in 1st and 2nd it HAS to be the box.
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  15. dandos
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    dandos New Member

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    [Apr 21, 2011]
    So would taking out the gearbox and changing the oil stop the noise for a while?? At the moment its only really in 1st gear when I floor it from low revs, but that is when parts are under most load I assume?? If the box is knackerd is it just a refurb I need?
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  16. s3dave
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    s3dave TFSI Hybrid

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    [Apr 21, 2011]
    Can you get a sound clip up?
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  17. ayfreetee
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    ayfreetee Member

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    [Apr 22, 2011]
    Chipped tooth in the box could be the prob, if its only in some gears and not others.
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  18. dandos
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    dandos New Member

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    [Apr 24, 2011]
    How much would that cost to repair? Is it a full recon?
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  19. ayfreetee
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    ayfreetee Member

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    [Apr 25, 2011]
    Probably alot cheaper to get a second hand unit if you can find one.
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