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Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 3037
Experience:  10 yrs. experience as BMW Master Technician, shop foreman and dealer.
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Bmw 750li awd twin turbo: Blue smoke at start from my twin

Customer Question

Blue smoke at start from my twin turbo motor
when idling for a while hit gas blue smoke also ?
Submitted: 6 months ago.
Category: BMW
Expert:  Gary replied 6 months ago.
Hello there,Can you give me some info, service history, any modifications, how the car is driven, how often it is driven etc.Blue smoke is engine oil, more than likely in the engine breather system.Some ducting needs to be removed to determine the cause, generally high blowby from worn piston rings.Gary
Customer: replied 6 months ago.
Service regulary no modifications the car did sit for 3 days
Customer: replied 6 months ago.
Car has 76000 miles on it should i pull the air cleaners and check for oil
Expert:  Gary replied 6 months ago.
How many miles now?Sitting for 3 days should not cause any harm.The first thing to is remove the duct at throttle body and inspect inside for oil residue.I have worked on many cars that have large volumes of oil in the ducting, including one of mine, for which I've just spent 10k on an engine rebuild, new turbo etc.Gary
Expert:  Gary replied 6 months ago.
Hi again,I'm not set up for international phone calls, I'm in Australia.I will open the question for other Techs who may be able to provide further assistance.Kind regards Gary
Customer: replied 6 months ago.
Ok thanks

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