Chain guides can last 200,000+ change the tensioner regularly. Chain guides usually fail from lack of tension on the chain. If you change the tensioner every 60-80,000 miles you can most likely get 200-250,000 miles on a set of chain guides.
I've done the job twice and if I owned M62 motor I would just use an inspection camera annually to check the condition and replace the tensioner religiously.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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