Rocker Arm Bridge Fell Off?? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-01-2014, 09:17 PM Thread Starter Rookie
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Exclamation 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.

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post #2 of 5 Old 04-07-2014, 07:07 PM Thread Starter Rookie
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Some more digging...

I pulled the intake push rod the next day & it was bent to hell. I figured there was some chance it bent and the cylinder misfired and back-pressured the exhaust side to knock the rocker arm bridge off, so I bought a new push rod from Ford & torqued the rocker arms back on cylinder 8. I turned it over by hand and both intake & exhaust moved, but the exhaust side is lagging (the push rod isn't really pushing up against the rocker arm socket).

It's looking absolutely like a lifter at the moment... is there any chance the push rod bent first and knocked it off, or am I being too optimistic again?

Second question: assuming I'm SOL & have to pull the heads (going to attempt myself, cab down), what should I replace while I'm in there? I'm figuring at minimum I'll need/want upper gasket set, head studs, the lifters, and a set of chromoly pushrods. Should I replace the valve springs, too? Is there any worth to HD up-pipes (I have EGR deleted; there's also no chance of me sending my stock up-pipes in) or a down pipe?
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post #3 of 5 Old 04-08-2014, 07:43 AM
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I would do lifters, push rods and all new rockers. If you upgrade to the chromoly push rods then I would probably do the valve springs also. I would also do the 6.0 manifolds and up pipes or as you stated at least heavy duty up pipes. You could also throw a ported intake manifold on there while you are at it if funds permit.

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #4 of 5 Old 04-08-2014, 04:05 PM Fanatic
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Yes, injector lines are a one time use item. Special install sequence as well. There is an install kit from Ford that has all the lines, injector O-rings and crush washers.
If the heads are coming off, have them checked out for cracking, and flatness and if they are good have bronze guides installed. good luck!

08 F350 CCSB 4x4 01/07 Job 1
0.030" de-lipped slugs, 70+ atmosphere turbo, ARP studs, Mild Ported Heads (w/bronze guides), Flo-Pro EGR Delete
Mini Maxx Race tuner, AFE exhaust turbo back, S&B Intake, Sinister coolant filter
Lifted nicely on 20" wheels
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post #5 of 5 Old 04-08-2014, 06:46 PM
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You'll probably find the bottom of the lifter gone and if it is there's a guarantee the cam suffered damage too.


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6.4l, intake, popping, push rod, rocker arm

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