First it started with a shudder miss and then clack clack clack......... Pulled valve covers found a bent pushrod the very rear on the drivers side . ford had one in stock and I replaced it . Still have the knock ? I'm thinking its the lifter. can it be pulled out without removing the head like with a puller or strong magnet??? 240k miles seems to be idling pretty smooth but down a little in power when driving. its definitely cam speed when you look at the rear rocker while running the knock seems to be in time with it. Thanks in advance.. Mark
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