2006 BMW 750i, when car idles the engineer appears to be burning oil as large amounts of blue smoke are coming from the exhaust. The car has 110k on it. Appears to run fine a other than when idling. BMW service rep indicated its about a $6k repair job as the labor is excessive to repair the seals. I've also heard that it could be a bad CCV .....any thoughts or suggestion.
Country: United StatesModel: 750iYear: 2006
Hello,Do you have a check engine light on? Or experience any stalling?
No warning lights or any performance issues with the vehicle. Only indicater light is a low oil indicator when oil is low. Burning about a quart every month for past 3 months
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Hello and welcome to JustAnswer BMW,
Thank you for the further information. You could definitely inspect the CCV valves but they usually cause a check engine light and some running issues or even a whistle noise when failing. If the diaphragm is torn then this would be the first place to start.
However, I think the problem on your vehicle will be the valve seals. I have traced the main failure to the exhaust valve seals which leak directly into the exhaust manifold causing smoking. This can also lead to a clog in the secondary air ports in which the result is a very difficult to clean cylinder head secondary air ports. The only fix is to have the valve seals replaced which is the high cost due to the heads need to be removed.
I have a link for a video I have made for CCV replacement. It is on a 6 series but the engine and procedure is the same:
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