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      05-31-2018, 03:18 PM   #2
jiggz
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Drives: E90 M3|F15 X5 50i
Join Date: Mar 2005
Location: Seattle

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I'm not as familiar with the N62 motor, but possibly valve guide seals?

If it were the N63 (xDrive50i) I would say that's a very possible reason for the white smoke. A very, very costly repair.

What's your mileage?
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