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Alternator Through Bolt Broken in Head

I don't want to reveal all my secrets but .... if you use a bench grinder and smooth off the threads on the bolt you may be able to use it like a screwdriver if the bolt broke with enough lip to catch each other... same as a pick or awl mentioned above... while we're skinning cats

It's snapped off flat and clean.
But great idea I'll keep in my mental toolbox....
 
IMO, to break that bolt off there and if it will not turn with an awl, it's likely bottomed at the end of the threads in the tapped hole and will need to be drilled out. Very important to center punch the broken off part in the center! You may have enough depth surrounding the broken end to use a transfer punch to help you stay centered. The first drill should be around .125" diameter then you can increment up from there whether it be a standard or "left" turning bit. How straight and on center you drill that first hole will dictate where the next size drill will go.
This would be my first choice, (Daves69) from looking at the pictures very close up and enlarged, also scribe a line at 12 0'clock on the stuck in the block broken bolt's surface, then if the scribed mark moves while working on it, be happy. Be patient. Wrap your drill bit with tape back from the tip (your call) so you know how far you are drilling in the bolt.
Anybody here hear of an easy out? Just askin, are they good to use?
 
easy outs are good but if you break it off they are hardened and hard to drill
so use good ones and be careful
 
Anybody here hear of an easy out? Just askin, are they good to use?

Ezy-outs have their place and when used accordingly are excellent. They're great for extracting broken off threaded pipe fittings and snapped threads that have broken from bolt failure or over tightening BUT NOT on bolts where the threads broke off during attempted removal as they seized. If the bolt broke whilst trying to remove it because the thread is seized, then the ezy-out is likely to snap before you get the thread extracted too, leaving you with an even bigger problem.
 
Anybody here hear of an easy out? Just askin, are they good to use?

I learned the hard way that they are not drill bits, as in use very slow. I revved that bad boy out and trashed the bit in under 3.2 nano seconds.

But like others said they have a place and are a sweet tool. I have used em on stuck bolts before though. Not 10 year rusted in place bolts just stuck.
 
Think an easy out will work, as I just had that bolt out a few days before it broke...

Haven't had time to try to extract it yet, very pregnant wife has been in hospital for past 4 days....
 
A friend taught me a neat little trick that helped in a situation like this . . .

If you've got a mig welder, weld in the middle of the bolt and build it up a little until you get above the front of the block level . . . (don't weld it to the block)
After you get it up to this height, place a sacrificial nut over the weld - now weld the buildup to the nut.
unscrew the nut out and the broken piece of bolt "should" come out with the nut. Working the nut slowly in both directions also seems to help loosen it up too . . .

This is a very precise "operation" . . . a brass busing out near the threads could also be a great help ( if you can find one )

Good Luck ! ! !
 
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