Did a favor for Wife's co-worker. Removed his blown rod through block JCW motor from his 2008 and sourced a 2006 JCW motor used 98k. I went through the used motor t-chain set, seals, hoses, t-stat, etc.... The motor sounds great, fired right up but I am pouring Blue smoke oil smell out the exhaust. Car runs at middle of temp range. No noises from engine. I did use the better looking Valve cover off old motor. Can a valve cover PCV system cause this?
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MINI Cooper R56 Valve Cover Replacement (2007-2011) | Pelican Parts DIY Maintenance Article