ARP install/Bent Pushrod and Broken Rocker Arm - Ford Powerstroke Diesel Forum
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Old 04-28-2013, 08:50 PM
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ARP install/Bent Pushrod and Broken Rocker Arm

I installed ARP headstuds with new OEM gaskets this past weekend. I sent my heads to Engine Services to have them checked out. I had a cracked head, so i got a new head and a valve job done on both heads. These guys came highly recommend to me by numerous local diesel shops and bill over at PHP, so i believe that all there work was done right. After i got everything installed i heard a popping noise through the intake. I pulled a cylinder 5 contribution code a knew it couldn't be an injector because they were all good before the job, and i polished the spool valves and put new orings on them. I pulled the passenger side down a found a bent push rod and broken exhaust rocker arm. I've ordered a new pushrod and exhaust rocker but my question is, is it safe to take the nut off the stud holding the rocker arm in? or do i need to pull the head, take it too the machine shop and put a new head gasket back on it? im just ready for this project to be over.
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Old 04-28-2013, 08:52 PM
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Don't take that stud nut loose until you have the new parts in hand to replace quickly. You can replace the rocker and push rod by removing the stud nut and the 2 bolts that hold the rocker down just be quick about it.
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Old 04-28-2013, 09:01 PM
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when u drop the new push rod down there push on it and make sure it's in the lifter pocket not sitting on the side

you should feel a little give and return

I am guessing you didn't try to manually rotate the motor before you fired it up ??

and agreed I wouldn't sweat removing i stud nut
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Old 04-28-2013, 09:03 PM
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I bought a dually that had this problem. Start to finish 3 hours. And I had to go get the part. I just did exactly what Tuscany just said to do. Then threw a loony wild on it and ran the hell out of it. It held up as long as I owned that truck.
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Old 04-28-2013, 09:05 PM
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Quote:
Originally Posted by ZMANN View Post
when u drop the new push rod down there push on it and make sure it's in the lifter pocket not sitting on the side

you should feel a little give and return

I am guessing you didn't try to manually rotate the motor before you fired it up ??

and agreed I wouldn't sweat removing i stud nut
no i didn't. i swear i put all the pushrods down in the pockets but apparently i over looked one.
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Old 04-28-2013, 09:20 PM
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hope you get it handled! seems like your on top of it
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Old 04-28-2013, 09:36 PM
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Quick question. When you reassembled the top end did you torque the rocker bolts first or the head studs first?
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Old 04-28-2013, 09:43 PM
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Quote:
Originally Posted by Tuscany View Post
Quick question. When you reassembled the top end did you torque the rocker bolts first or the head studs first?
Rocker arms first to 23-24 ft/lbs (irrc) then studs 70/140/210. The weird thing was when I took the valve cover off the second time the bolts holding the rockers down were loose.
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Old 04-28-2013, 09:48 PM
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Yeah I always torque the studs first then the rockers. I noticed last time when I did it, I tried to do the rockers first and it was causing clearance issues with the valves so I removed the torque on the rockers and torqued the studs first than did the rockers and had no issues. When I say clearance issues I mean when I torqued the rockers first it lifted the head off of the block and as soon as I released the torque the head sat flat on the block again.
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Old 04-28-2013, 09:57 PM
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Thanks for all the input. The parts should be here around noon tomorrow. I'll let y'all know when I get her running tomorrow.
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