blue smoke at startup/oil usage star case s1418000028
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Thread: blue smoke at startup/oil usage star case s1418000028

  1. #1
    Grasshopper goodB0Y's Avatar
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    blue smoke at startup/oil usage star case s1418000028

    just got my d back from the dealer...

    I've been experiencing blue smoke at start up along with an oil usage problem (2 liters in 3500km)

    well apparently there is a star case #s1418000028 that relates to my problem.

    here's from my invoice:

    cause:
    Burning oil

    correction:
    remove intake manifold to pressure test PCV passage as per star case s1418000028. PCV passage leaks. Intake manifold requires replacement. re-install intake. Parts on order.

    there is another line on my invoice that has my complaint about blue smoke... it just says to see above.

    now... i'm trying to understand how the PCV passage leaking would add oil to the intake? the PCV is supposed to exit into the intake... idk...

    wondering if anyone here has ever had there intake manifold off and could share some insight...

    or maybe the leak is in a spot where there is allot of oil spray and it picks up more oil...

    anyone have any thoughts?
    claudio.anveres likes this.

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    Administrator FSTDANGO3's Avatar
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    The passage is supposed to be a specific path the recirculating oil fumes travel into, if that is compromised oil fumes and oil (with no catch can) will go right down in main intake and into cylinders burning the oil
    STEVE

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    Grasshopper goodB0Y's Avatar
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    Add to that you would think that it would cause a lean condition... Unless it's before the pcv valve (valve is located on/in the intake manifold)

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    Grasshopper goodB0Y's Avatar
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    Edit:

    The more I think about it I guess the leak is either before or after the pcv valve into the crank case...

    Man I hope this is the fix...

    Edit:

    Looks like there is a hose coming off the valve ( thought it might be integral) means the leak has to be before the valve
    Last edited by goodB0Y; 11-13-2014 at 08:12 PM.

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    I have issue with this DX. If there's any intake leak at all, PCV or otherwise, there will be fuel trim compensation. This SHOULD cause a MIL.
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    Grasshopper goodB0Y's Avatar
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    What do you mean by a mill ?

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    MIL= Malfunction Indicator Lamp (check engine light), I completely disagree with Wayne in his assumption that the car would throw a check engine light in this situation, i see leaking intake manifolds all the time with no check engine light at all, the fact is the computer can compensate and has a threshold to where its going to trigger the lamp and set a code. a small leak may only require the fuel adaptations to need to be slightly adjusted to compensate to the point where that threshold has not been exceeded. I think this diagnosis is 100% plausible as a cause of oil consumption and not triggering the check engine light as the condition is most prevalent at startup where the vehicle is in a rich running condition and is in open loop not actively monitoring fuel trim information via the O2 sensors. I could go on and on about this.... But i say this is a valid attempt the dealer is making to address your situation. Oil consumption issues are not clear cut easy to fix issues and be glad they came up with something that at least makes sense to try and remedy your issue.

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    Grasshopper goodB0Y's Avatar
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    I agree with you ... If the leak was small enough there is a very good chance it wouldn't set the check engine light... And I am very pleased that we have something to try...

    If the passage is of any length longer than a couple of inches then there is also a good chance it will collect oil... Putting that oil directly into the manifold

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    Super Moderator tomk's Avatar
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    it doesn't take much of a leak to get a puddle of oil in the intake manifold..

    I suspect an air leak into the intake manifold won't cause a fuel trim MIL under most conditions.. it would be more likely to trip an idle control MIL.

    Good info about the passage leak, though.. that is a diagnosis we have not seen, and might explain why the TSB doesn't cure all instances of blue smoke..

    ...tom
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    Quote Originally Posted by FSTDANGO3 View Post
    The passage is supposed to be a specific path the recirculating oil fumes travel into, if that is compromised oil fumes and oil (with no catch can) will go right down in main intake and into cylinders burning the oil
    STEVE
    So if I have a catch can and still see oil on cold start on level ground what should I do? I didn't see the blue smoke until I put the Corsa on which I know didnt affect it but makes it visible due to the more free flow. I have 5k miles and want to go for my first oil change soon. My catch can has been 50% full the past 1k miles and I just emptied it so I know the drainage is working from the way I routed the lines to and from the BT can. No puddling effect going on there.

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