Thread: broken rocker stud removal?

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Can anyone tell me how to remove the remainder of a rocker arm stud that has snapped off. They are pressed into the head and all attempts to remove it with bolt pressure have failed. I have a short amount still sticking out of the head. I have a screw in replacement and will thread the hole when I get the old one out.
ALL IDEAS WILL HELP.

I once read a suggestion about removing a broken stud by welding a nut to the piece sticking up and then turning the
nut to get the stud out. On an assembled engine, doing anything like welding or drilling is a risk.

If you drill, the pilot hole needs to be exactly centered since as you go bigger on the drill, you will hit the head material if you start off center. Also, an EZout probably wont work since they are made to back screws out....not press fits.

Best way is to remove head, take head to a machine shop with a mill that can drill a true hole.

By the way, you are replacing all the studs, arent you?

press in studs are hard enough to get out intact
I've never seen one that's broken off removed
welding a nut or something to whats left may work
but be careful not to break the boss
the best way to do it is just put a screw in stud
in its place. they make ones without a hex as to
not interfere with the stock rocker arm

weld a stud to it with threads that you can put washers or a socket down over it and screw the new nut down on it and pull it out just as you would if it wasn't broken off. welding a nut to it and trying to turn it want ever work. if it is broken flush i would still drill it and drive a threaded stud in the hole, tack weild and pull it out.

This is what that would look like, and it works.

ps- if you don't have a welder you are screwed.

The old "weld a nut on" trick won't work on a press-in. Welding a threaded piece on might work, but bear in mind that any welding will harden the steel and make the poor machinist's job a lot harder if it fails.

I'd drill and tap it dead center to 1/4-24 screw a stud in to it and use washers and nut to pull it out......

Originally posted by HWORRELL
I'd drill and tap it dead center to 1/4-24 screw a stud in to it and use washers and nut to pull it out......

that will work to, it would be a cold day in hell before i pulled that head off. I ran a round track race car that we had to use stock rockers and I'd break one off seemed like every week, and I never pulled a head to fix any.

Originally posted by HWORRELL
I'd drill and tap it dead center to 1/4-24 screw a stud in to it and use washers and nut to pull it out......

One other note is cut a hole in the center of one of those blue paper shop towels and slide it over the stud boss then use an old G.M. ignition pickup magnet and slide it over the boss on top of the towel to catch the drill and tap shavings. works like a champ.....