N20 turbo oil leaking

image Ok I know I have posted these type of pictures before,,,,but you guys keep asking for more of them,,,,this is the exhaust side of a N20 turbo,,,,you can see on the exhaust turbo blades oil on the blades,,,this is the sign of a bad turbo,,,,the seal inside  the turbo is letting oil past the exhaust turbo blades.image Here you can see the oil spraying off the exhaust turbo blade and onto the exhaust housing,,,,and from there it goes to the catalytic converter,,,,,,then you get the smoke coming out the exhaust during cold start,,,,if it gets real bad you might see smoke during acceleration,,,,,this car I replaced both the turbo and updated with the new oil feed line.

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19 Responses to N20 turbo oil leaking

  1. Faiq says:

    Can this potentially be s serious problem or is it just a minor smoke issue at start up… THANKS

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  2. Faiq says:

    Thanks, do they have to take the engine out to do the repair? My car still under warranty till 2018

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  3. Christoph says:

    I think i have some simmular problem, on the motor mount under the turbo there is a spot of an oil leak. On cold start after more than 24h there is a puff of white/bleu smoke and my 320i n20 engine is from late 2012( i think first building series of the f30) but my dealer gues that its a broken valve cover… dusnt make any sence… atleast thats my oppinion.

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    • Sounds like you have 2 problems,,,,the oil leak might be from the turbo you would have to have that checked out,,,,but the blue smoke during cold start up is usually the turbo oil feed line needs to be updated to the new oil line,,,,very cool name my step sons name is Christoph

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      • Christoph says:

        Hehe thx,

        So what do you think of the diagnostic vision of the valve cover?
        Is there any way to maybe test it or what to check for?
        I now have a case running whit bmw benelux to figure out who and what whent wrong at the dealership where a buyed the car, why my dealership think its the valvecover and why the european warantybureau dont want to pay even if i have a full package for a year.

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      • It could be the valve cover,,,the dealer can check the engine vacuum from the oil cap,,,,and if there is to much vacuum inside the engine it could be the valve cover,,,,,but I have only seen 1 valve cover cause smoke in the morning during start up,,,,the valve cover usually causes a lean mixture fault not a smoking issue.

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  4. Christoph Brems says:

    Thats my gues to, just becuase there is no check engine light and no faults on the onboard computer. Maybe i can make my own vacuumgauge and test it myselve.
    Also i think there should be a milky oil color under the oul cap with a broken valve cover.

    If this al turns out that i have to pay it myselve than i go and fit a upgraded turbo frm a 42 mm to a 47 mm inlet and spice up the hp + order the upgraded oil feed line and place it all, just like i fixed my e46 if there was someting wrong with it.

    For this moment BMW has failed bigtime for making this engine and this turbo, the internet is loaded of this problem and for my opinion they do nothong about it.
    Same for the timing chain, that was a problem from about 2002/2003???
    And still now they make this plastic chainguides that needs to be changed after 60k miles? Its just sick.

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    • Yes it is very sad,,,,you won’t find a white milky under the oil cap,,,,that only happens when a headgasket or head fails,,,,you can check the engine vacuum by loosening the oil cap while the engine is idling,,,,there should some vacuum on the oil cap while removing it,,,,if it is very hard to remove the oil cap while the engine is running then you have a bad valve cover gasket.

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      • Christoph Brems says:

        Got a update for the vacuum check… and no big vacuum under the oil filler cap. Warm or cold engine, there is ni difference in the vacuum pull of the cap. It is very easy to remove and there is indeed no milky substance on the cap, great news because its not a blown head gasket.

        Again on the underside of the turbo pleanty of wet oil marks so lets go to the dealership and get the car fixed.

        Is there anyway to demand that i can get a new/rebuild turbo an upgraded oil line? Or do they always do a diagnose everytime you enter the shop?

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      • If the turbo is leaking oil then you should be able to get a new turbo

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  5. gv says:

    I think these engines run hot. Its a reliable Mitsubishi turbo that only fails in the bmw. Same with the chain likley the guides get brittle from heat. Is there anyway to get the fan to switch on before its temperature and drop the running temperatures 5degrees or so?

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    Liked by 1 person

  7. Cristian says:

    Hi, N20, F30, 320i. After a long stay ( 5 days or more ) when i start the engine, i see in the back of the car, 2 seconds of little smoke without any colour. The car works very well, i have no error, and no smoke after that 2 seconds. It is a problem? Or it is from valve deposits? Thanks

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