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Old 06-17-2010, 01:18 PM
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Removing Monkeyed up rocker studs (SBC)

So I got around to removing the push in rocker studs on a set of SBC cast iron heads that I'm messing with (going to mill down the bosses and thread them for screw in studs and guide plates), and not having anything better to do it with I put a rotator upside down over the stud, then a valve retainer or rocker ball over that (instead of the normal socket over it to use as a spacer to pull against), and then tightened a rocker nut to pull it out.

It turned out that one of the studs was bent (I didn't notice), and when the nut started going hard I figured "instead of breaking something I'll go on to the next one and come back to this one later." I went on to the next one, the threads on the nut were slightly monkeyed up and went on to strip the threads on that one.

So now I have two rocker studs with monkeyed up threads that I can't quite figure out how to pull. Anyone have any suggestions?

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Old 06-17-2010, 03:10 PM
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Since you are planning to mill the rocker pedestals, I assume you have a mill of some sort or a seat and guide machine to work with.
In that case, I would just get centered over the stud (after cutting it off) and
drill it out.
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Old 06-17-2010, 03:17 PM
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Are the threads stripped all the way or just at the point where it started pulling. As I recall there is about one inch of thread on that stud. I would take a die and chase the thread- may even be room for new threads ; then stack your shims so your nut is on the best part of the thread and use plenty of oil to lube. (straighten the bend one )
If all else fails, cut a bit off the problem stud; take one of the old studs that you pulled; cut down a bit and weld to problem stud. Start pulling process.
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Old 06-17-2010, 03:34 PM
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One is stripped most of the way, and also has the pile of junk that I'm using as a spacer still on it, the other I could probably cut but I'm not sure that I could get the end of the threads cleaned up well enough to get the thing started.

I would be really shocked if somethign welded to the stud would be strong enough to pull a pushed in stud out, but I suppose I could try.

I have a bridgport, though I'm not sure what would actually cut/drill those studs, they're made of something crazy hard, make grade 8 hardware look wimpy.
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Old 06-17-2010, 03:38 PM
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while I'm thinking about it, anyone know what angle the rocker studs are supposed to be at relative to the deck or a good way of figuring out that angle when mounting them down to the mill table?
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Old 06-17-2010, 03:41 PM
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Quote:
Originally Posted by Silverback
One is stripped most of the way, and also has the pile of junk that I'm using as a spacer still on it, the other I could probably cut but I'm not sure that I could get the end of the threads cleaned up well enough to get the thing started.

I would be really shocked if somethign welded to the stud would be strong enough to pull a pushed in stud out, but I suppose I could try.

I have a bridgport, though I'm not sure what would actually cut/drill those studs, they're made of something crazy hard, make grade 8 hardware look wimpy.
I drill them with your basic HSS drills with no problem.
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Old 06-17-2010, 04:32 PM
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Once the studs ar stripped and no chance of saving them. I usually cut stud off and drill out slug with a bit just undersize of the hole.

Screw in studs are 7/16, so the hole is already to tap size. Just mill studs with end mill on same plane as the stud hole. I use a cutter that stops at the correct depth, so all holes are the same height.
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Old 06-18-2010, 03:32 AM
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I've had good luck in removing stucked & stripped studs by welding a new stud on top of the stripped one. Use lots of welding power. Shim up the pull-tool accordingly and try pull it out.
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