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Old 11-16-2012, 06:11 PM
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Rookie2008 Rookie2008 is offline
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Location: NYC 4 Eva! Current California
 
Join Date: Feb 2011
Posts: 2,193
Mein Auto: BMW 745LI/ F02
I don't think there is any definitive answer for valve stem wear. There seems to be speculations that the cause is from extended oil changes etc.. which has yet to be proven. I beg to differ on that note. BMW just simply made a bad design of the N62 engine.
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