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Discussion Starter · #1 ·
I'm not very proud of myself at this moment. As a experienced Marine Corps helicopter mechanic and then receiving an industrial maintenance degree and working in industry as a maintenance and engineering technician for more than 20 years, all I can say is I screwed up. I was using a calibrated torque wrench. Unfortunately it doesn't help if the torque setting is the wrong one! I snapped off the bolt of the #2 injector hold down clamp inside of the head. I had the torque wrench set to 30ft-lbs. It never got close to 30ft-lbs, it was turning very easily but obviously snapped. I have sprayed Sili-Kroil into the top of the broken bolt and allowed it to sit. When I push on the sides of the bolt with a jewelers tip screwdriver, I can see the Kroil move around and the bolt looks like it is not tight in there, it appears to have some movement. I know I deserve the criticism; however, right now I would prefer your help. I'm thinking I need to use a left hand drill bit or an easy-out. Any help and suggestions to get me out of this bind are appreciated.
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No negative criticism here; we have all been there, right? :cool:

I've been having some pretty good luck with some of the drill out/screw outs lately; craftsman, has some.

Craftsman 7 pc. Drill-Out/Screw-Out Power Extractors
Item: 52157 | Model: 720SR

Craftsman 7 pc. Drill-Out/Screw-Out Power Extractors - Tools - Hand Tools - Tap & Dies & Sets

These are sold under; many other brands, so you can find them other places.

Lots of newer techniques and removal products out there:

https://www.google.com/webhp?source...&ie=UTF-8#q=broken bolt extraction techniques

Do you have traditional easy outs and drill bit? I've had good luck with the newer style drill and screw outs, minimum work and quick removal. Its kinda funny; because you would think, they wouldn't work but they do! :)

ETCG: has a interesting way of using a punch to turn the broken part; you have some fastener left, so maybe give this a shot?

https://www.youtube.com/watch?v=c-VD1yx61bA

Other techniques; mig welding a washer and then a nut, on top of the broken bolt or whats left of it:

https://www.youtube.com/results?search_query=how+to+remove+broken+bolt+from+head+

https://www.youtube.com/watch?v=fs7GTW4ZEDA
 

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Discussion Starter · #3 ·
Thanks for the links Billymade! I'm going to try the lh drill but method.ill get some tomorrow and will keep this thread updated.
 

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Based upon what is left of your bolt; I was thinking, you could try turning/rotating the bolt with a small pointed punch, like in the etcg video. Do you have access; to a mig welder?


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Discussion Starter · #5 ·
Tool Metal Metalworking hand tool Auto part Metal Screw Auto part Wheel

Thanks for the suggestion on tapping.

Bought left handed bits but before I tried the new left handed bits, I figured I would try to tap it out after 24 hours soaking in Kroil. My college freshman daughter patiently held the light for me. Took about 45 minutes. Slow. Patience is the key. I'm so thankful this worked out. Hopefully the new hardware will be at the dealer tomorrow!
 

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Awesome! Glad you got it handled! :) Supporting one another around here in a positive manner; is the way to go! :cool: A defintie contrast; to some of the shops I have worked at and coworkers, I have worked with! :p
So, that torque spec; must have been pretty low... not 30 ft pounds?
 
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