Broken Rocker Arm Bolt - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 10-20-2008, 01:36 PM Thread Starter
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Broken Rocker Arm Bolt

Okay, can someone help me

I was driving and a cylinder started to miss, so i new it was the rocker arm, I figured it was the temp bolt i put in, but turns out that I have the worst luck and somehow the stock bolt snaped? the other half is still in the bracket, how can i fix this and what the F would cause that to happen?



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post #2 of 22 Old 10-20-2008, 01:43 PM
duct tape & zip ties

 
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Improper valve gap. Which should be measured with a gauge. If it is off it will cause undo stress to the rocker arm or the valve. Be glad it was the rocker arm and not the valve that let go.


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post #3 of 22 Old 10-20-2008, 01:47 PM Thread Starter
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I replaced the valve springs to there org. location... the are all seated in the groove. I did notice both bolts were lose, I was able to ge the thread out of the head by hand...



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Looking at 6.4s Moving in a few months then hopefully buying my dream truck!!!

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post #4 of 22 Old 10-20-2008, 01:50 PM
duct tape & zip ties

 
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Quote:
Originally Posted by cchase View Post
I replaced the valve springs to there org. location... the are all seated in the groove. I did notice both bolts were lose, I was able to ge the thread out of the head by hand...
When you put it all back together you should have gapped the valves. In the book should have a listing of the tolerances for assembly. Just because you put it back together where it was does not mean it is correct. You should always check the valve gap when you reassemble the engine.


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post #5 of 22 Old 10-20-2008, 01:51 PM Thread Starter
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i just changed the springs, and did head studs. never really took the engine apart



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Looking at 6.4s Moving in a few months then hopefully buying my dream truck!!!

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post #6 of 22 Old 10-20-2008, 01:57 PM
duct tape & zip ties

 
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Quote:
Originally Posted by cchase View Post
i just changed the springs, and did head studs. never really took the engine apart
Which would require to have the valve gap checked and adjusted accordingly with the tolerances listed in the manual.

Chalk it up as lesson learned and then fix the problem. I know it is just a pain in the butt.


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2005 6.0 Crew Cab Long Box Lariat, current truck

2004 6.0 destroyed by contaminated fuel

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Last edited by bigcountrysg; 10-20-2008 at 02:11 PM.
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post #7 of 22 Old 10-20-2008, 02:24 PM Thread Starter
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how would you adjust them?



On vacation from a truck for a year or...
Looking at 6.4s Moving in a few months then hopefully buying my dream truck!!!

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post #8 of 22 Old 10-20-2008, 02:41 PM
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Quote:
Originally Posted by cchase View Post
how would you adjust them?
when you tighten down the bolt that holds the rocker arm.

Look in the book and adjust to the tolerance. You do need the cylinder in at top dead center when you adjust them.


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post #9 of 22 Old 10-20-2008, 03:13 PM Thread Starter
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hmm... i wish marty would have put that in his video



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post #10 of 22 Old 10-20-2008, 03:25 PM
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A few questions...


Did you use the 910 springs?
Did you try to torque the 2 bolts on the rocker?

For the LIFE of me, I don't remember ANY gap specs. I have removed/replaced a spring and bolted the rocker hand tight without issues.

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