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Old 11-13-2012, 12:49 PM
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crazyeyeskilla crazyeyeskilla is offline
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Location: Colorado
Join Date: Sep 2008
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Mein Auto: '13 535xi M-Sport + ZDH
Only when the engine is cold, say for the first minute it's idling. I don't think it matters whether the ambient air temp is 50F or 0F, but when the engine oil is below operating temperature, it occurs. A couple of years ago I read it had something to do with the lifters.
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