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Thread: Strange Noise From Turbo

  1. #1
    Regular Member Brooky18's Avatar
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    Default Strange Noise From Turbo

    Hi Everybody,

    Hopefully someone may be able to help me out trying to identify the cause of this strange noise im getting on my 2.0 Turbo Sri.

    A while back the whistling from the turbo got noticeably louder, and after checking variuos threads on the site, I went and checked all the hoses to and from the turbo and had a good look round the turbo and intercooler. I couldn't find anything damaged.

    However recently the noise has changed, I am still getting the loud whistle but now I am also getting what I can only describe as a loud humming, under hard acceleration. I would not say it was a whine or a screech. So again I have checked all the hoses as I sounds like it could be caused by air escaping from a loose or split hose. After a good couple of hours checking condition and tightness of hoses I could not find anything obvious.

    I also disconnected the hose from the air filter to the inlet of the turbo to check if I could find anything obviously damaged on the turbo. The only thing that I found was that there was freeplay on the impeller backwards and forwards, does anybody know if this is normal

    Any help with this would be much appreciated, Thanks

  2. #2
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    Quote Originally Posted by Brooky18 View Post
    The only thing that I found was that there was freeplay on the impeller backwards and forwards, does anybody know if this is normal

    Any help with this would be much appreciated, Thanks

    Ouch there shouldn't be any movement in the shaft, maybe a bit left and right, but not as you described.

  3. #3
    Full Member Big Sig's Avatar
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    basically, there should be very little noticable movement in the impellor shaft in any direction.
    Now I need a turbo to keep up!

  4. #4
    Regular Member Brooky18's Avatar
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    Thanks for the reply,to clarify the freeplay is along the shaft, so that would be left to right as your looking at the turbo from the front of the car, there did not seem to be any movement of the shaft.

  5. #5
    Regular Member Brooky18's Avatar
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    If there is a problem with the turbo, would this cause the noise that I am getting or would that be another problem??

  6. #6
    Full Member Big Sig's Avatar
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    It could cause the noise as its spinning very very quickly when under load. They also get very hot. Best thing to do is get some expert advice.
    Now I need a turbo to keep up!

  7. #7
    Regular Member Brooky18's Avatar
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    Thanks, Ill take it to a garage tomorrow and get them to have a look, and I think that there is a turbo specialist in darlington so ill give them a ring. I was just hoping that it was not going to be expenive to sort out, but it sounds like the turbo needs sorting out

  8. #8
    Full Member Big Sig's Avatar
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    It may not, could be something else
    Now I need a turbo to keep up!

  9. #9
    Regular Member Brooky18's Avatar
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    OK its now official the turbo is knackered, phoned turbocharger solutions in darlington and told them the symptoms and about the movement with the impeller and they recon that the centre housing and bearing have gone, so new turbo required as to repair it would cost the same as a replacement. Quick way to lighten the bank account by £400.

  10. #10
    Regular Member Brooky18's Avatar
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    Smile

    Well im now a happy, happy boy again, New turbo fitted and it did not cost the earth. Smile well and truly back on my face, I didn't realise how much peformance i'd lost with the old knackered turbo. Now the car feels fantastic and rapid again .All I need to do now is talk the OH round and with the money that I could of ended up spending on the turbo get the car remapped and make the grin even bigger.

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