Broken extractor

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Broken extractor

Post  Ghostcruiser on Thu Feb 19, 2009 10:14 pm

Freakin' great....while trying to extract a broken exhaust manifold stud in my 440, I drilled a hole in it, and used a spiral extractor--that was technically too small for the stud--to back it out (I'm cheap..it was on-hand, but now I know I shoulda used a drive-in type)...sure enough, the damn thing broke off in the stud. Now I've got a hardened extractor stuck in the head. Any ideas for getting it out? Rolling Eyes

We need a Tech section on the forum! Wink
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Re: Broken extractor

Post  dwc43 on Thu Feb 19, 2009 10:50 pm

Can you get all the bolts off to remove the manifold. If so, heat the stud with a torch and use a stud puller. Get one at your local Craftsman tool dealer. Should not be too big a problem as long as you can get the manifold off and out of the way. Very Happy

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Re: Broken extractor

Post  Ghostcruiser on Thu Feb 19, 2009 10:58 pm

I guess what I was trying to say, is that the extractor is broken off inside the stud, which is broken off inside the head....flush, I might add....
Rob Wink

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Re: Broken extractor

Post  dwc43 on Thu Feb 19, 2009 11:02 pm

OK. that makes a big diff right there. What size is that stud? I can't remember right off hand. You might be able to get a carbide tipped end mill bit small enough to chuck in a drill and get it out that way, but if you can't get the right size, you'll be looking at drilling and tapping the head for a larger bolt. You might have to take this one to a machine shop to get it fixed since that e z out in broken off in there. Very Happy

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Re: Broken extractor

Post  Ghostcruiser on Thu Feb 19, 2009 11:27 pm

It's a 3/8" stud, grade 5...but that damn extractor is hardened! Twisted Evil Some say I can heat it to ruin the temper, then chip it out with a small punch....
Rob

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Re: Broken extractor

Post  dwc43 on Fri Feb 20, 2009 11:28 am

That might work, have not tried it. I'd check with a machine shop or some place like Granger that sells to companies and the like. If they have a end mill bit small enough with a carbide tip, it will cut right through it with no problems at all. Very Happy

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Re: Broken extractor

Post  Ghostcruiser on Mon Feb 23, 2009 10:16 am

dwc43 wrote:That might work, have not tried it. I'd check with a machine shop or some place like Granger that sells to companies and the like. If they have a end mill bit small enough with a carbide tip, it will cut right through it with no problems at all. Very Happy

I'll look for one this week, and give it a shot! Very Happy
Rob

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Re: Broken extractor

Post  dwc43 on Mon Feb 23, 2009 10:47 am

If you don't find one let me know. I have a book you can order them from. I'll have to find it and see what sizes they have. Very Happy

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Re: Broken extractor

Post  Ghostcruiser on Mon Feb 23, 2009 2:12 pm

Thanks, man...we've got an industrial supply place here that I'm gonna try tonight...I'll let you know!
Rob

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Re: Broken extractor

Post  dwc43 on Tue Feb 24, 2009 11:17 am

Did you find a end mill bit yet? Check www.use-enco.com They have several styles and types listed. There's some two and 4 flutes starting at $4.99 ea. Sizes start at 1/32 6/64 1/16 3/32 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 5/8 3/4. As long as you don't get one bigger than a 1/2" it will fit in a 1/2" drill chuck and you should be able to drill it out. Very Happy

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Re: Broken extractor

Post  Ghostcruiser on Tue Feb 24, 2009 8:42 pm

my locals did not have those end mill bits...looks like I'll be picking some of those up via the Net!
Rob

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Re: Broken extractor

Post  cerres on Thu Feb 26, 2009 6:01 pm

Before you go after what's left of the Stud, it might be well worth your while to send me the head. I've a machine shop (chuzz knows me) and let me get out before you have a drill go off on some tangent...
Bill

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Re: Broken extractor

Post  dwc43 on Sun Mar 01, 2009 3:03 pm

Hey Rob. Did you get the extractor out and the stud too? Just wondering. Need an update ... lol. Laughing

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Re: Broken extractor

Post  cerres on Sun Mar 01, 2009 7:36 pm

Ghost, I wish you luck but this has disaster written all over it... been here, done this... found it better to clamp it on the table of my mill and do it right the rist time... after years of rust, heat and corrosion, .... nature usually wins

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Re: Broken extractor

Post  Ghostcruiser on Wed Mar 04, 2009 10:46 am

Been busy with extra-curricular activities lately, and haven't had time to work on it...I'll update as soon as I do! Wink
Rob

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Re: Broken extractor

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