Update: 2.2Dti inlet manifold

Discussion in 'General Motoring' started by Guest, Mar 13, 2005.

  1. Guest

    Guest Guest

    Well, further investigation followed the thought "where is the oil
    coming from? there shouldn't be any oil in there".
    There is oil inside the turbo piping. Eeek! turbo bearings/seals?
    When I removed the air inlet pipe to the turbo these was oil in there.
    The breather pipe from the cam cover is connected to the air inlet pipe
    just in front of the turbo. The amount of oil around that pipe suggests
    that it's coming out of the breather. Is that why these engines have a
    reputation for using more oil then expected?
    In other words is the turbo sucking oil out of the engine at times when
    it's delivering a high boost?

    I removed the air mass sensor to check for contamination, oil dirt etc.
    The design is completely different to the pictures of the cossy one
    (thanks UnoWhoo). There is no obvious wire in the air flow that could be
    cleaned up. There's a diode stuck out in the air flow, thats probably
    being used to check the inlet air temperature.

    Changing the inlet manifold gasket doesn't look to bad. Initial
    investigations suggest that only the upper gasket is leaking.

    Dave
     
    Guest, Mar 13, 2005
    #1
  2. Guest

    Yawn Guest

    Hmmm..... I've had first hand experience of a turbo sucking oil from the
    engine...
    resulted in total destruction.

    The car started throwing out a LOT of whiteish smoke, the revs went sky
    high, I pull over,
    turn off the ignition, pull out the key get out thinking it's gonna catch
    fire and it's still
    revving to extreme !! The key is in my HAND ! It's still running....

    The more I talk to people about what happened, the MORE I hear about people
    they
    know who have had the same experiences on other Vauxhalls, Astras and
    Vectras...
    exactly the same thing happening, ie...oil seal gone in the turbocharger and
    then it starts
    to suck oil from the engine and burn it throwing the revs off the scale
    (even with the key out!)
    until it destroys the engine.

    I've read of a mechanical shut off on marine diesel engines that totally cut
    off the air to
    starve the turbo, shame nothing like this has been developed for cars yet!
    This happens across
    all the manufacturers I believe.

    Keep an eye on it !
     
    Yawn, Mar 13, 2005
    #2
  3. Guest

    me140 Guest

    You always get oil in the turbo intake pipes - if there wasn't I would be
    amazed.
     
    me140, Mar 13, 2005
    #3
  4. Guest

    Guest Guest

    Yes you are right, I expect to find some.
    The way the breather is set up there will be.
    No bearing or seal is totally oil tight so some will leak out.
    It's just a matter of how much. There is *NO* white smoke. The oil
    consumption is not excessive (yet).
    Dave
     
    Guest, Mar 13, 2005
    #4
  5. Guest

    Guest Guest

    <snip>
    Yes I am aware that this can and does happen.
    There was an excellent example on Scrapheap Challenge during the last
    series. One team (Barley Boys?) had a whoops with a truck engine. A most
    spectacular blow up.
    All I can do is keep an eye on it and hope that I can stall the engine
    out if it does happen.
    Dave
     
    Guest, Mar 13, 2005
    #5
  6. Guest

    Yawn Guest

    Yeah, saw that....

    I didn't know what was happening at the time, I got told I could have tried
    to stall it but i was in the outside lane of a motorway at the time so I was
    just wanting to get off the road with the car really, safely rather than try
    and stall it not knowing what was gonna happen.

    I find it absolutely bizzare that with all the sensors and the ecu on these
    cars these days, nothing could prevent it.. The ecu never even showed any
    errors, it was working fine only the engine was.... well, "dead".

    Keep something handy to block the air intake!
     
    Yawn, Mar 13, 2005
    #6
  7. Guest

    Guest Guest

    Bit tricky to block that quickly enough, it disaperas under the offside
    headlamp. I think you would need 2 people, one desperately trying to
    stall it the other desperately ripping off the air filter in order to
    jam a towel in the air intake to the turbo.
    Don't fancy my chances with either method.
    I think one has to be aware that it could happen and awake enough when
    it does to stall the engine quickly.
    Dave

    PS Got my Cx500 out of the garage, started first time (after draining
    the carburettor bowls). Needs an MOT, tax disc and insurance.
    At least I'll have a "spare" if the car goes bang!
     
    Guest, Mar 13, 2005
    #7
  8. Guest

    UnoWhoo Guest

    Hi Dave and all
    Sorry the MAF sensor cleaning didn't work out, but thanks for the report.
    If anybody feels "handy" you could always make an adapter for a fire
    extinguisher type of system. Used to use it into the 2x 45DCOE Webbers on a
    Mk1 Esc Cosworth BDA when rallying - pipe to the engine compartment / carbs
    and one to the fuel tank in the boot and a BIG button on the dash and one
    outside too. On big industrial engines, after fuel pump and governor
    rebuilds we used to have a CO2 extinguisher on standby by the air intake -
    "man with one in hand". ;<))
    Neither quite the mods for a family saloon, but you'd have thought that the
    manufacturers would have had a safety system of some sort?
    Regards to all
    U W.
     
    UnoWhoo, Mar 13, 2005
    #8
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