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Late reply here. The lifter didn't look bad, but the reason the rocker messed up was because the lifter didn't pump up to remove the lash. When there is lash the cam lobe smashes into the rocker (roller) and eventually beats up the bearing to where the roller won't roll. Then the sliding friction wears down the roller until things get all messed up. The lifter that didn't pump up was the root cause of the rest of the failures.
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