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6.4L -- Rocker Arm Bridge Fell Off???
Have a 2010 6.4L, EGR/DPF deleted, exhaust, tuner, couple other things.
Couple weeks ago the idle started going funky and revving a bit, non-rhythmically. I cold start her a couple days ago and a loud popping noise shows up out of no where. The noise quiets down with some throttle, & with enough stops completely. I opened the hood and it's coming from the intake area. Read the code off my tuner and it's a P0284: cylinder 8 contribution/balance. I figure it must be something to do with the #8s intake or exhaust valves.
So I dig into her and eventually get the valve cover removed. The rocker arm bridge is off of one side of the exhaust valves. The bridge looks fine, the rocker arm locks fine, push rod is straight as she could be, and no damage to the valve spring.
Am I being too optimistic figuring the bridge just "fell off"? Has this ever happened? Or is it the hydraulic lifter. What's my best plan of action? Should I rebuild Humpty and hope everything works out, or should I pull the heads?
Secondary question, I've heard the injector fuel lines need to be replaced once removed--is this true?
Any help is super appreciated.