Quote Originally Posted by JMBD2112 View Post
I've only seen one tensioner break on a 5.3, and it broke when I was collapsing to do a cam swap. Never seen one actually fail
Mini had a recall on them. And I have seen it in VAG. But typically it is due to incorrect engine oil used or infrequent oil changes. Sludge build up, clogged passages will lead to tensioner failure.