Blake - Do you think you did anything to maintain that timing chain and timing chain tensioner? I'm curious especially given your 233k successful miles. Religious oil changes? Did you do engine flushes? Do you warm up your car at all before starting to drive? I'm a new Rover HSE 5.0 owner and the timing chain is the only thing that keeps up at night with my Rover. It's not a daily driver for me and I do love it.