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Message: [QUOTE="KCTurbos, post: 1497829, member: 13852"] HUGE thanks to Tony for helping me figure this out. We figured out the problem... but it was way worse than we thought LOL. 800hp + quick spooling compounds + stock rods = BAD IDEA Here is why we could not get cam sync, The cam pin sheered and the gear spun. With the cam so far out of timing I think that is why we were having issues... [ATTACH=full]174731[/ATTACH] With the cam out of timing... every intake valve hit every piston which led to breaking a bunch of rocker arms. What is weird is when the truck first broke down I pull the valve covers and oil rails and none of the rockers were broken. But I think from cranking the truck over for hours and hours over the past 2 months trying diag the problem, the cam gear continued to spin and make the problem worse... thus breaking the rockers. Thinking back I could actually hear some of the rockers break while turning the truck over... I thought it was an intake valve or valve seat dropping and hitting a piston. [ATTACH=full]174732[/ATTACH] But this is what started the whole thing... number 8 Rod decided it couldn't handle the pressure LOL. It appear the the rod twisted and broke just below the wrist pin, then spun around and wedged itself against a cam lobe... which sheered the cam pin. What is interesting is the wrist pin and rod bearings were not affected. The big end of the rod is still attached to the crank and there was not visual damage to the bearing or the crank. [ATTACH=full]174733[/ATTACH] Here is a shot of the top side of the damaged number 8 piston. It looks to be in great shape from the top LOL. It was the only cylinder without any valve marks on it. [ATTACH=full]174734[/ATTACH] [/QUOTE]

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