6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2000 996 Caliper Bolt Stripped head
Reported or suspected cause
allan head is rounding off
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Leading evidence: 'allan head is rounding off' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'allan head is rounding off' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean things out' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
An easy way to do this without a tap is cut a groove in a good bolt and use that to clean things out.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If you don't have an easy out, you can get a tap and die set because you're going to need to chase the threads or repair the threads anyway.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If you don't have an easy out, you can get a tap and die set because you're going to need to chase the threads or repair the threads anyway.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The other works well if you only have a small stub to grab onto - I got a header bolt out using the Facom extractor - the stub I had to work with wasn't more than a quarter inch long.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The other works well if you only have a small stub to grab onto - I got a header bolt out using the Facom extractor - the stub I had to work with wasn't more than a quarter inch long.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T140027Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I am doing my first full brake job and everything worked great until the final top caliper bolt pass side. I began to take it out with a 10 mm Allan like all of the other ones. I immediately noticed it was a whole lot more difficult to turn. Got the breaker bar out and penetrating oil etc.. managed to get it out I would say half way. AND IT STOPPED. wont budge. The problem is the Allan head is rounding off. It is now stuck 1/2 way out and I cant get it back in or out. I have heated and cooled, Penetrating oil banged on it and now the head of the bolt looks to be toast.
Can any of you lend a helping hand with ideas. I am very afraid to break the bolt off in the hub assembly. I have heard welding the allan socket to the bolt may help but wanted to see if you guys have any words of wisdom
Thanks in advance
I'd put a vice grip on it and see if that does it. Working it in and out a little, along with oil.
I'm not sure welding will work here as it got it's self stuck while backing it out, rather than the head snapping or stripping putting it in. You're potentially dealing with crap in the threads rather than it bottoming out or the head getting too tight and twisting off. Plus, the last thing I'd want to do is heat it up from welding and make it softer at this point.
IMO
Probably corrosion on the bolt. Given the limited space, lock some vise grips on it really tight, then turn it back in 2 threads, then back out 2 threads and keep working it, turn it in then out some more. Second, since the bolt is sticking out some from the caliper, dremel cut the head off, remove caliper and do the same thing. You also will have better luck getting some penetration oil in the threads with the caliper out of the way, and locking some vise grips on the stud part of the bolt.
Do not heat it. That will only cause it to expand and lock up tighter. Patience will do it. If it were me, I would cut the head off so you can get the caliper out of the way.
Hit it with PB blaster, let it soak, and use a stud extractor to grab that sucker and back it out. Vise grips can work - but you can also wind up twisting off another section of bolt at which point you're pretty far up the creek.
I have both of these - the titan (the first one) is great if you have a decent section of bolt - at least a half inch. The other works well if you only have a small stub to grab onto - I got a header bolt out using the Facom extractor - the stub I had to work with wasn't more than a quarter inch long. There was much cursing involved, but I really didn't want to resort to the nut welding trick...
Titan stud puller:
Facom stud extractor:
Both demonstrated in this video:
Broken Stud Removal Techniques.mp4 - YouTube
You might want to chase the threads to make sure they're not all boogered up - I don't remember ever having any issues with removing caliper bolts...
Here's the nut welding technique:
Removing a broken bolt using a welder - YouTube
Try getting an easy out and tap it onto the head of the bolt. See if you can try walking it out that way. It'll destroy the bolt, but it may get it out and is cheaper/easier than welding. If you don't have an easy out, you can get a tap and die set because you're going to need to chase the threads or repair the threads anyway.
This is a source reference. Confirm exact model applicability in the original material.
