N62 not as bsd as M62 but I'm willing to bet the timing tensioners are overdue.

If the chain tension gets loose the guides can get chewed up and all hell breaks loose. One guy had the chains "chainsaw" through his block.

If you hear rattles on a cold start that fades that's often as the chain tensioner builds oil pressure. Which will take more time as the tensioner ages.


–awr–

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)