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Caliper key bolt broken off

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Old Aug 5, 2009 | 05:09 PM
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Caliper key bolt broken off

I managed to snap the head off the caliper key bolt on the driver's side of my 1/2 ton F150 2WD.

Has this happened to anyone else? If so, how did you get out? I tried vise grips, but there's not enough room. The bolt is exposed outwards. I'd rather it to go out than back all the way out.

Any ideas?
 
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Old Aug 5, 2009 | 05:28 PM
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You need to drill a hole in it then use an easy-out, you can buy them at any auto store.
 
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Old Aug 5, 2009 | 05:29 PM
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Or bolt extractor. Here is a link so you can see what it looks like. Very easy to use, make sure you drill the hole the size it says to.

http://www.autozone.com/autozone/cat...Bolt+Extractor
 
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Old Aug 5, 2009 | 05:30 PM
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well maybe not VERY easy but it's not to bad :P
 
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Old Aug 5, 2009 | 05:38 PM
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If it fails drill it out and heli coil it back to a 3/8 and make sure to put anti sieze on the bolt to prevent this from happening next time.
 
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Old Aug 5, 2009 | 09:10 PM
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Buy a reverse twist drill bit. Most hardware's have them. I have had better luck than with extractors.
 
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Old Aug 5, 2009 | 09:23 PM
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i think this has happened to everyone! hehehe i replace mine with grade 8 bolts.
 
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Old Aug 5, 2009 | 09:31 PM
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drill it out and retap it. happened to me.
 
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Old Aug 5, 2009 | 11:19 PM
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Originally Posted by highboy1975
drill it out and retap it. happened to me.
x2 on the drill an re tap hardest part is getting the center punched
 
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Old Aug 6, 2009 | 08:15 AM
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Originally Posted by 4x4 Bart
Buy a reverse twist drill bit. Most hardware's have them. I have had better luck than with extractors.
+1ooo on the reverse twist drill bit. Most the time just drilling the hole will turn the stud right out.
 
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Old Aug 6, 2009 | 08:25 AM
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If all else fails,the calipers are cheap enough to replace. Replace in pairs.
 
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Old Aug 6, 2009 | 09:00 AM
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weld a nut on the exposed part of the bolt. Let it cool naturally, and it should back right out of there.
 
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Old Aug 6, 2009 | 11:59 AM
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i used vise grips to turn the bolt thru then, ran a tap thru the threads just to clean them up.
 
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Old Aug 6, 2009 | 06:39 PM
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Thanks for the suggestions. I don't have any reverse twist drill bits, but sounds like a good investment.

I ended up drilling it out out of frustration since the vise girps did nothing. Hard to center the damn thing! But I did get it out.

Let's see what retapping will bring me. Does anyone know what size? 5/16 looks to be the closest.

Even at my age, I still manage to break bolts.
 
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Old Aug 6, 2009 | 06:41 PM
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From: MD
Originally Posted by GLR
If all else fails,the calipers are cheap enough to replace. Replace in pairs.
They are no bolts on the calipers on our type of trucks.
 
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