Dead Turbo?

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Thread: Dead Turbo?

  1. #1
    Saab Junior
    Join Date
    May 2002
    Location
    France
    Posts
    48

    Dead Turbo?

    Bad month for my car...
    New oil pump
    Breakdown on motorway because of dirty throttle body
    Now dead turbo?

    After having replaced my oil pump I found the engine was whining a bit and I put it down to the new oil pump.

    It is very difficult to locate where the sound comes from but it is definitely on the front right of the car.

    The whining has got steadily worse. At first I thought I had not replaced the serpentine belt properly so took it off and reset it. No change.

    There is no real noise when the car is idling or reving.

    As soon as I accelerate I hear the whining but if I accelerate hard it goes away (or is drowned by the noise of the engine). If I accelerate slowly from stop the whining is terrible.

    I do think the car has lost power and is sluggish.

    I do not think it is the water pump as I changed it about a year ago.

    There is no check engine light.

    I did try running the engine without the serpentine belt (brakes on and acclerating in drive mode) and there is a definite whining but not too loud (engine is not truly under load).

    I even put back my old oil pump just to check but the noise is the same.

    In the past there has been blue smoke when I start the car but not all the time, usually after a long drive.

    Is there any way of checking the turbo without taking it apart?

    Are those typical symptoms of a dead turbo?

    If it is the turbo do you think it can be refurbished?
    Last edited by natoqc; 07-21-2019 at 06:03 PM.

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  3. #2
    Saab Afficionado
    Join Date
    Dec 2003
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    Peterborough,Cambs,UK
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    1,132

    Re: Dead Turbo?

    You dont tell us which car/engine combo but its likely the turbine shaft is moving around a bit and you can hear it whining under load/boost.
    Disconnect the pipe running to the intake throttle body and see how much oil is in there.
    If you disconnect the pipe on the inlet side of the turbo you should be able to feel for play in the turbine shaft.
    If you can move it around at all its time for at least an new CHRA.(split the turbo and insert new CHRA cartridge or new complete Turbo)
    Dont put the job off as if the shaft hits the side walls too much or the bearing lets go then you will have an intercooler,inlet and exhaust/cat full
    of broken turbo bits along with dumping the oil everywhere.

  4. #3
    Saab Junior
    Join Date
    May 2002
    Location
    France
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    48

    Re: Dead Turbo?

    Sorry,
    I have a 1998 9-5 2.3T with B235 engine

    As this is the first time I would be digging into the turbo, what must I remove to have access to the inlet side of the turbo?
    Last edited by natoqc; 07-22-2019 at 11:50 AM.

  5. #4
    Saab Afficionado
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    Dec 2003
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    Peterborough,Cambs,UK
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    Re: Dead Turbo?

    This should help
    https://www.youtube.com/watch?v=ehalLlNiQqU
    and
    https://www.youtube.com/watch?v=mhOVaju1Svs

    Also a quick check is to lift up the big black pipe that runs to the throttle body at the back of the engine.
    If you have oil in the pipe then the turbo seals are leaking and coating the pipework through intercooler.
    Also the large rubber pipe to left going to the MAF....oil in there is the same problem

  6. #5
    Saab Junior
    Join Date
    May 2002
    Location
    France
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    Re: Dead Turbo?

    Hi,
    Many thanks for your response.
    It was indeed the turbo and replaced it with a new aftermarket one from Neo Bros.

    Car has been working fine since then until last week when the engine sound was more "barritone" than usual. No clonking or any other strange sounds.

    Yesterday when I started it there was a fair amount of white smoke but then nothing when the engine was warm. In the evening no white smoke.

    This mornig upon when I turned the engine one there was a huge plume of white smoke.

    I've done some searching on the internet and it would seem that it is either the head gasket which is gone or the turbo seal.

    Is there any way of knowing which it could be?

    Maybe it is the Turbo which faulty, but how to prove it?

  7. #6
    Saab Afficionado
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    Dec 2003
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    Peterborough,Cambs,UK
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    Re: Dead Turbo?

    Unless the car has overheated then less likely to be the HG..although 1998 and high miles maybe?
    Test for combustion products in coolant...any sign of oil in coolant?(kits on Ebay)
    https://www.ebay.co.uk/itm/DX-1-COMB...oAAOSwyhBcb~im
    Also do a compression test to confirm.
    https://www.ebay.co.uk/itm/Diesel-Pe...sAAOSwy2Bdunk1

  8. #7
    Saab Junior
    Join Date
    May 2002
    Location
    France
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    Re: Dead Turbo?

    Many thanks again for your eply CJA,

    My car has 260 000 km on it and has never overheated.

    Quantity of white smoke varies from day to day but I do have to top up a little with coolant from time to time, but have been doing this for years and never found the leak despite having changed water pump, radiator etc... and no white smoke until recently (although there was blue smoke prior to turbo blowing and any white smoke will most likely have been masked by the burning oil).

    While waiting for the tester to be delivered I have come accross some ads for stuff that you put in the radiator and seals the gasket leak, something like this: https://www.noleaky.co.uk/.

    In your opinion is it worth trying this solution before ripping the engine apart?

  9. #8
    Saab Afficionado
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    Re: Dead Turbo?

    Wait until you have the results of the testing.
    After that its probably worth a try before further work...at 260K and a 98 any repair is likely to be the value of the car unfortunately.

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