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Message: [QUOTE="96F350KID, post: 1458874, member: 1608"] Ford changed the rocker arms design to prevent the premature wear of the rocker tip. They also changed the pushrod length to stop lifter and rocker wear. A lot of guys get the valves cut instead of looking at the pushrods which is why it's never a larger topic. I didn't even read you had valve to piston contact. The Ford dealer should of noticed the part # was superseded to a new one. Now that you've ran it like that for a few thousand miles you need to replace the lifters and pushrods to make sure you don't have anymore issues. For safe measures they also had the backside of the cam lobe made to shock the lifter and cause it to break as well. Colt Cams can explain it better if you give Geoff a call. Few others know about it too. I don't know how involved you want to get to pop a new cam in it but if it was my personal truck I would. We get people that come to our shop and trucks from other shops that always have poping in the intake and valve to piston contact they can't figure it out after reassembly for head gaskets with new rockers. I'm surprised you ran as long as you did without an issue. [/QUOTE]

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