Author Topic: Snapped Bolt help  (Read 3786 times)

Offline Ben Lessani

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Re: Snapped Bolt help
« Reply #10 on: 02 April 2008, 10:25 »
Remember to use left handed drill bits, I've had a 0% success rate at removing sheared off bits with screw type extraction tools, but best of luck!

Offline smithysmoo

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Re: Snapped Bolt help
« Reply #11 on: 02 April 2008, 10:37 »
WEll I've got a pilot hole drilled of to machine mart later to pick up a screw extractor and then finger crossed. What do you do with a left handed drill bit???

Offline Ben Lessani

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Re: Snapped Bolt help
« Reply #12 on: 02 April 2008, 10:56 »
It cuts counter-clockwise instead of clockwise like normal drill bits, with the idea that whilst drilling a hole - it could also turn the stuck bolt out.

Whereas the normal drill bit, essentially tightens the stuck threads by turning it in further. Bear in mind stud extractors are very hard steel, therefore very brittle, if you snap that off, there's no chance to drill it out.

A lot of people stick a small weld and nut onto the end of the thread to turn it out.

Offline smithysmoo

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Re: Snapped Bolt help
« Reply #13 on: 02 April 2008, 11:01 »
Ches mate,

Am passed the welding a nut on bit although would have tried that if I'd have thought.

Can you get these left handed drill bits from anywhere B&Q etc/

Offline filthy

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Re: Snapped Bolt help
« Reply #14 on: 02 April 2008, 20:38 »
What I'm about to suggest sounds seriously pikey, but stick with me....

Have you considered whacking a small stardrive into the sheared bolt? the shock could loosen the bolt a bit, and the stardrive is quite sharp and will bite into the bolt...

I just had to do this after rounding the allen head bolt on my crank sensor on my mk3....after taking the whole front of the car off to gain some room....

Sometimes you just need to get medievel.... :smiley:
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Offline jonezee_ipswich

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Re: Snapped Bolt help
« Reply #15 on: 03 April 2008, 19:32 »
lol that could well work! but if you snap the torx bit you are in a world of hurt as their toughened and bill be a b!tch to drill out!! :sad:

Offline mattkh

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Re: Snapped Bolt help
« Reply #16 on: 03 April 2008, 20:26 »
the shock could loosen the bolt a bit,
Apparently there is a freeze spray that can also shock the bolt. 

Offline bundy

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Re: Snapped Bolt help
« Reply #17 on: 03 April 2008, 21:55 »
lol that could well work! but if you snap the torx bit you are in a world of hurt as their toughened and bill be a b!tch to drill out!! :sad:

if you snap the torx drive you would need a carbide drill, plenty of cutting compound and even more patience!!

Offline DarnPB

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Re: Snapped Bolt help
« Reply #18 on: 04 April 2008, 01:20 »
If you try an easyout, (stud extractor), do not go too big on the hole. As the easy out bites into the snapped bolt or stud, there is a risk of expanding the damaged bolt out even further thus 'locking' it into position. If this happens, then drill out the bolt as far as possible without going into the threads, then use a tap to clear out the remenants of the old bolt. You need to be very acurate with the drilling though.


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Offline smithysmoo

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Re: Snapped Bolt help
« Reply #19 on: 07 April 2008, 15:06 »
Yep ended up having to tap a new hole...All back together now though and doesn't leak so thats good.