Hey Mark so many theories out there but don't know if any really have been a cure. The lifter needle bearings change may have helped a lot but I've still seen a few failures but Dave is correct on the oil pressures. There's also a theory out there on poor quality camshaft material. This link has that video and others. https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2963225/3.html


Facts are stubborn things.