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[longlast]

Didn't expect it to go as easy as it was going changing the the brake pads.
All went well with the rear pad change and the right hand front pads change.
Now the left hand caliper top fastener is seized and the 12 point head is f@#@ed. I'm also changing the stock fasteners over to stainless. As the lower fastener in the pic
Any one had this ? Any ideas how to proceed?

I've tried putting other sockets on with no luck the head just rounds off more.
I'm thinking I'll have to remove the wheel and cut the head off the bolt then pull the caliper off then remove the stud bolt and hope it won't snap off in the caliper.
Any suggestion then pulling the wheel,...not that it's a big deal pulling the wheel it's more of a nuisance
Any other suggestions welcome

[joejoebobo]

You could treat it like any other stripped screw... lots of methods. Because it's torqued on pretty well, maybe take an angle grinder with a cutting wheel and make a slit on the head so you can back it out with a flathead screwdriver bit? Kind of an awkward angle... it'd make sure to cover all your paint and chrome. At least you won't have to remove the wheel. Good luck!

Cheers

[J.D.]

For the bolt holding the caliper to the fork leg, correct?

Grab it with a big vice grips and give it a whack with a hammer.

[longlast]

You could treat it like any other stripped screw... lots of methods. Because it's torqued on pretty well, maybe take an angle grinder with a cutting wheel and make a slit on the head so you can back it out with a flathead screwdriver bit? Kind of an awkward angle... it'd make sure to cover all your paint and chrome. At least you won't have to remove the wheel. Good luck!

Cheers

Was thinking that (cutting with an angle grinder.  I've given it some good sharp hits to try and shock it .
I got an under size socket on it by waking if on with a 2lb hammer but no joy.

[longlast]

For the bolt holding the caliper to the fork leg, correct?

Grab it with a big vice grips and give it a whack with a hammer.

That's correct 

 All my attempts are failing  grinder looking more and more like the answer

[JMK]

penetrant on the back multiple wacks  with a hammer.  spray it and let it soak and do it again. then vise grips or most auto parts stores have stripped bolt extractor sockets

[longlast]

penetrant on the back multiple wacks  with a hammer.  spray it and let it soak and do it again. then vise grips or most auto parts stores have stripped bolt extractor sockets

  stripped bolt extractor socket maybe a solution

[J.D.]

There's not much thread into the aluminum caliper.  A bit of PBlaster and either vise grips or specialty tool should break that loose.  I'd personally hold off on the grinder a bit longer.

[longlast]

There's not much thread into the aluminum caliper.  A bit of PBlaster and either vise grips or specialty tool should break that loose.  I'd personally hold off on the grinder a bit longer.

I agree I'll be exhausting all the position first.

I'll see if I can get a stripped bolt head socket.  There are tools out there for grabbing hold of these rounded off bolt heads

[JMK]

Im sure you know but just in case, dont get penetrant on pads on other side, and clean penetrant off of rotor with degreaser prior to reassembly.

[Twolanerider]

Any chance that with the lower caliper bolt removed you could rock the caliper itself back and forth enough for the bolt to break loose?  Might need the wheel and rotor off to gain enough space to move it much.  Still potentially worth a shot before getting too dramatic in other ways that might be more destructive.

[longlast]

Im sure you know but just in case, dont get penetrant on pads on other side, and clean penetrant off of rotor with degreaser prior to reassembly.

Thanks for the reminder  things can easily be over looked when you get rapped up in another issues

[longlast]

Any chance that with the lower caliper bolt removed you could rock the caliper itself back and forth enough for the bolt to break loose?  Might need the wheel and rotor off to gain enough space to move it much.  Still potentially worth a shot before getting too dramatic in other ways that might be more destructive.

That a good idea Don, that may work if like you say there's room for it to swing. Trying to avoid pulling the wheel  but if I have to  like I've said it's not that big a deal to pull

I'll give it a try tomorrow I've shut it down for today.

[CVODON]

I actually had that happen a few years ago while helping out a friend. Went to Discount Auto and got a stripped bolt tool. It slipped over the head then had a "Cam" that tightened up against itself as you applied force with a strong arm. Soaked with PB before we left to get tool and it came right out, without much force actually.
Now anytime I need to do this job I have a couple new Snap-On brand sockets that are only for this operation.
Good luck.

[danner55]

 I would get a big center punch & give it a couple a good hits.

 Then try a small pipe wrench with a pull pipe over the pipe wrench.