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Broken bolt extraction
- Thread starter cenzo989
- Start date
Rob Rodriguez
New member
This might work https://www.youtube.com/watch?v=cUWWUGGjLq0
PinkRosePetal
New member
Oooo.... you've gotta drill that out and clean up the threads. I'm assuming you're skilled - your success will depend on you drilling dead centre on the broken end. If you miss centre, you'll end up drilling out a part of the alloy crankcase thread. Start by centre punching and if you see you're a little off centre angle the punch and tap it over until you've got the dot centred then tap it square on again to form a good start for the drill. Use a small drill to give you a centre hole then go up in sizes until you're at the limit of touching the alloy. Use a pick to remove the remains of the thread from the alloy and finish off by inserting a tap to clean up any thread damage.
Using a Easyout is an absolute last resort because they are very brittle and by the way they work they tend to expand the part which is already jammed. If you break one off you're left with a hardened steel Easyout tip firmly jammed in the hole you've so carefully drilled!
I can see an alternative... I'm sure with care you could fabricate a piece of steel which would work as a clip/clamp and be held by that top hex screw.
Good luck with it...
Gwolf
Well-known member
Get a good set of reverse drill bits. If the broken piece does break loose, the reverse drill bit will bring it on out instead of twisting it in tighter. Start with small pilot hole and slowly work up to larger bit sizes. A set of reverse drills are much cheaper than than a machine shop or messing around with helicoils.
PinkRosePetal
New member
EdMat makes a very good point. If you broke the bolt by over-tightening it, the thread will likely be loose and, with a bit on ingenuity, you might get it out fairly easily. If, however, it snapped as you were attempting to unscrew it, it must be seized and you do have a problem.
Good thinking EdMat! :thumbup:
P.W.
New member
It looks like the bolt is on the hydraulic shifter body(Hydraulic housing, part 25). I would put the filter cover back on with the one screw and get a suitable 6 mm bolt that just touches the broken part. Get the bolt drilled thru with a 3 mm drill and use it as a guide to start drilling out the broken part with a reverse drill( Left Hand drill). Another method would be to use a reverse drill and build it up with aluminum tape till it fits not too loosely in the cover hole and use it to center drill on the broken bolt. Wind the tape on the drill so it tightens when you drill.
bmccaffrey
New member
Could also try this. Drill a little way into it , Get some J-B ClearWeld quick setting epoxy. Use a bolt to fit into the drilled hole with the epoxy on the end. Find a way to hold it in there. Let sit for 24hrs Hard as a rock. Used on my spyder on a stripped bolt work good
cenzo989
Member
The freakin moron i am - thought turning it clockwise was to unscrew it..........but then then when i realized it was counterclock wise to loosen screws.... it was to late and it ssnpped
:banghead:
bmccaffrey
New member
Seems though that aluminum would strip before it snapped off
Ditto on the EasyOut. I broke a bolt off in my KZ1000 case and then managed to break the drill bit off in the center trying to use an Easy Out. I ended up sending the case to some joker I never heard of who used a "plasma arcer" to burn the whole thing out and filled in the resulting hole with threaded Aluminum. Worked like a champ. Not the way I would go first though.
Well you may not be happy with what you did, but how it broke brings some better news. It’s likely the threads are not the problem ie: locktite or corrosion. So I’d go with the reverse drilling (carefully centered). The heat from drilling might loosen any locktite. If it doesn’t come out while drilling Add some heat and go easy with an easyout. Good luck!
PinkRosePetal
New member
Hehe, good pun!
cenzo989
Member
hey guys,
sorry it took so long to reply..... i had to wait for parts from eBay...
I ended up spraying some WD-40 on it... sit for 20 minutes
then did a center punch in middle of bolt.. or as close as i can to the center
then bought aa set of LEFT- Handed drill bits
out some cutting oil on the tip of drill
put drill in REVERSE
drilled on the center punch mark.....and bolt came right out
THANKS FOR ALL THE SUPPORT GUYS
you guys rock!!!!!! :yes::cheers:
sorry it took so long to reply..... i had to wait for parts from eBay...
I ended up spraying some WD-40 on it... sit for 20 minutes
then did a center punch in middle of bolt.. or as close as i can to the center
then bought aa set of LEFT- Handed drill bits
out some cutting oil on the tip of drill
put drill in REVERSE
drilled on the center punch mark.....and bolt came right out
THANKS FOR ALL THE SUPPORT GUYS
you guys rock!!!!!! :yes::cheers:
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