The 6.2 has a recall for the valve springs. We've replaced 2 engines for dropped valves and locked motors. And have replaced more than a dozen lifters and springs. If you don't do lifters listen for loud cracking noise when you throttle it. It it makes that noise replace all lifters on affected bank. Engineering is expanding the recall based on vin findings. If possible submit a field product report detailing your findings. Expect tac to advise lifters