Broken head bolt

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Topic author
Guest

Broken head bolt

Post by Guest » Mon Jun 29, 2020 9:26 pm

Need help. My son-in-law broke a head bold off. He drilled and tried using
a eazy-out on it. Unfortunately a young would be helper with more strength
than brains came and tried forcing it and BROKE the eazy-out off .
It's Too hard to drill. Any suggestions would be appreciated.
Just happy it wasn't my TT
Thanks , Gordon Clayton gclaytonsr@yahoo.com

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Mark Nunn
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Re: Broken head bolt

Post by Mark Nunn » Tue Jun 30, 2020 12:51 pm

Is any portion of the bolt sticking above the head surface? If it is, weld a large nut to it and try turning the nut. See a photo of the process in this thread.

viewtopic.php?f=2&t=13292


Topic author
Guest

Re: Broken head bolt

Post by Guest » Tue Jun 30, 2020 9:42 pm

Thanks Mark but no such luck it's all down in the hole.
I have no idea how to help him. Too hard to drill and I doubt if it could be broken up
with a drift pin. I'm at a loss.
Gordon Clayton

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RajoRacer
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Re: Broken head bolt

Post by RajoRacer » Wed Jul 01, 2020 3:23 pm

You will need to remove the cylinder head in order to remove the broken stub - a bit more work involved but well worth the end result !


Topic author
Guest

Re: Broken head bolt

Post by Guest » Thu Jul 02, 2020 7:33 pm

thanks will let him know if he hasn't removed the head as yet.
Any thoughts on if an arc welder could weld something to
the broken piece ? I am not familiar with an arc welder at
all. OR what if he cut new threads further up and used a
shorter head bolt that he would have to make up. I know
we are not dealing with very high compression. As you
can tell, I'm no mechanic. I dabble mostly in wood.
Thanks for your help. Gordon Clayton


Billdizer,Spencer In
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Re: Broken head bolt

Post by Billdizer,Spencer In » Thu Jul 02, 2020 8:39 pm

Find your local Snap-On tool vender. They sell drill bits strong enough to drill an easy out or a broken tap! No idea of cost, but if that's what it takes!

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Henry K. Lee
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Re: Broken head bolt

Post by Henry K. Lee » Fri Jul 03, 2020 6:25 am

Another option after removing the head and hopefully you have a straight on access is to use a Hougen Brand Roto-broch. It is a hollow drill bit with a pilot. You can remove the pilot and carefully use either a 3/8" or 7/16' bit just enough to get around the broken piece. It has saved me many of times. Hope this Helps!

Hank

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Henry K. Lee
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Re: Broken head bolt

Post by Henry K. Lee » Fri Jul 03, 2020 6:54 am

IMG_4080.jpeg
IMG_4081.jpeg
They will not drill out the easy out extractor but are very sharp and of a quality to deal with the broken bolt.

Hank


Topic author
Guest

Re: Broken head bolt

Post by Guest » Fri Jul 03, 2020 10:30 am

Thanks guys will let him know.
Mtfca folks are always so willing and helpful.
I am a member but messed up my pass word
Can't figure out all this technology stuff !!!!!
Gordon Clayton member #49977

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