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Message: [QUOTE="6.0 Tech, post: 1467609, member: 23001"] Got a motor i did for a buddy about a year back that keeps breaking rocker arms. We did the usual head studs, egr stuff, o ringed the heads, put an rcd stage 1 cam and lifters in, and now has their push rods as well (we'll get to that :doh:), regulated return, warren 190/30s, kc stage 2, bd exhaust manifolds, no limit intake and cac tubes, and csf intercooler. When the truck was first put together, i had elite pushrods in it, as he was sold them with the rcd am and lifters, and truck didnt run right at all. Finally found the pushrods were too long, and swapped in the rcd ones, and truck was good. About 2k later, it broke a rocker arm. I dont remember which one off hand, as its been a while. Figured what the hell, and put one in. About 500 mi later, it broke another, again, i dont remember which ome. Figured they were fatigued from having the long pushrods, and swapped all the rockers with ones off a core motor i had at the time. Trucks been fine for about 10k now, and morning he broke another, #4 exhaust it seems, as its popping out the intake. I havent torn it apart yet. The core motor had about 180k or so on it if i remember right, and all failures have been at idle. First one he was in the drive thru, second, truck was idling while he was filling it up with diesel, and third was idling in the parking lot before he was gonna walk into work. What am i missing here, that he keeps having issues? For what its orth, my truck isabout the same setup, except i have valve springs and bigger injectors, but ive put a bunch more miles on than him, and drive a hell of a lot harder, and am on original 215k rockers, and havent had any issues. Thanks [/QUOTE]