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Just sounds like normal valve train noise to me. Not aware of that engine having a problem with timing chain tensioner but I do recommend changing tensioners at 100,000 miles and every 40-50,000 after that.
Having changed the guides on a couple M62tu, it's a lot of work that can likely be avoided for the life of a car just be changing the tensioner. (with only OEM).
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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