PRH
Well-Known Member
I’m sure it’s listed in the instructions that come with the heads........ but I thought the Ede Magnum heads used SBC rockers.
Rocker studs snaping
- Thread starter holic_77
- Start date
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I think the problem is the guide plates causing the roller tip to be not centered on the valve tip. This in turn is imparting a twisting action on the rocker, & that has flexed the studs & they have snapped.
Many times I have had the above problem of misaligned guide plates. I cut the plate in half, reposition the halves for correct roller tip alignment & weld the halves in the new position.
Other possibilities: springs are coil binding; retainers hitting guides at full lift; material fault with the studs, have seen them snap like that.
Looking at the pics, there seems to be enough movement for the stud, zero to max lift, within the rocker slot; so I do not believe the stud is contacting the slot. In the pic, the mark looks like a material flaw.
Many times I have had the above problem of misaligned guide plates. I cut the plate in half, reposition the halves for correct roller tip alignment & weld the halves in the new position.
Other possibilities: springs are coil binding; retainers hitting guides at full lift; material fault with the studs, have seen them snap like that.
Looking at the pics, there seems to be enough movement for the stud, zero to max lift, within the rocker slot; so I do not believe the stud is contacting the slot. In the pic, the mark looks like a material flaw.
What made the mark on the rocker stud right where the rocker would contact it?
I’d take another look at your pushrod length using a checker, and are you certain you’re not coil binding or that theres retainer to guide clearance? And you might look into some adjustable pushrod guides if you can find them.
dano
Evil Handy Man
Possibly the trunnion hole as the rocker pivots. The rocker needs inspected too. These issues are always tough when not being able to see them with your own eyes.
holic_77
Well-Known Member
I'm on the phone with Mike now, thank you
512Stroker
We are all here because we are not all there.
Sho nuff!
512Stroker
We are all here because we are not all there.
That is a bending fracture - flat and clean break
Verses a torsional fracture from twisting - jagged break
Verses a torsional fracture from twisting - jagged break
MOPAROFFICIAL
Oogliboogli
Measure the guide plate slot spacing.
Compare that measurement to the rocker stud spacing. It looks wrong.aka too wide AND offset..
The pushrod angle in the one pic is binding the rocker, stud length wrong..and if you just happen to know the stem height of the eddy heads.. you'll already know that its taller than stock...so the pushrods either should be shorter than stock...or longer with the use of a also longer rocker stud.
One way will lead to better geometry while the other will only address half the issue. You need to check multiple things next time when measuring and buying parts.
If Mike with B3RE can't help him, it's time to rethink his build.
furrystump
Well-Known Member
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Guide plates off so far the roller is less than halfway on the valve tip. Inexpensive rocker twists a hair and the adjuster hits the corner of the slot making the witness mark. Pop goes the weasel. Fix the guide plate alignment. Sharpy the rocker slot and see if a shiny spot comes back. Putting a high quality stud on will probably just break something else. It’s definitely talking to you!
holic_77
Well-Known Member
Everything was wrong and I’ll be the first to admit when I make a mistake or mistakes. Moving on…
Starting fresh and working with Mike. 7/16 PROPER length studs, new quality rockers, proper guide plate positioning, and understanding correct push rod geometry using Straub Tech.
Starting fresh and working with Mike. 7/16 PROPER length studs, new quality rockers, proper guide plate positioning, and understanding correct push rod geometry using Straub Tech.
MOPAROFFICIAL
Oogliboogli
I turn the lighting on my phone up so I could see yer original pic ...and now I noticed it's pretty obvious that they were too short ....you should never ever have so few threads engaged with the adjuster nut.
You want at least 2 threads showing above the adjuster nut.
That's the how they are usually broken.
You also had the rocker binding. Like getting an uppercut and ball kick at once.
You want at least 2 threads showing above the adjuster nut.
That's the how they are usually broken.
You also had the rocker binding. Like getting an uppercut and ball kick at once.
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