Broken Rocker Arm Bolt

[cchase]

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?

[bigcountrysg]

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.

[cchase]

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...

[bigcountrysg]

Originally Posted by cchase

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.

[cchase]

i just changed the springs, and did head studs. never really took the engine apart

[bigcountrysg]

Originally Posted by cchase

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.

[cchase]

how would you adjust them?

[bigcountrysg]

Originally Posted by cchase

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.

[cchase]

hmm... i wish marty would have put that in his video

[Dirk]

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.