Stipped Bolt/Screw Help

"KayPee" (phamthk) 09/17/2014 at 02:16 • Filed to: None

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Thanks to the last person that did maintenance on my motorcycle that I just got, most (or all) of the screws/bolts have been over-torqued (because why not right? better have it tight than to have things fall off). The 5 years that it was left sitting in a garage sure doesn't help either (but is a lot better than it sitting outside). Originally it needed a hex key/bit with an indent in the middle to clear the little bulge that is in the head of the bolt, which is why I went and bought a security bit set. I sprayed WD-40 and BP blaster all over it and let it soak and tapped it with a hammer, but it wouldn't budge. I've tried using a torx bit and that also ripped it up even more.

Long story short: Any suggestions on how to remove this screw/bolt?

I just want it out. Drilling is definitely on the end of my list and next up, I have been thinking about JB welding a screwdriver to it.

A Datsun 510 for your time.

Squid > KayPee 09/17/2014 at 02:29

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I don't know if JB Weld has the strength to handle that torque, but if you don't have access to a real welder it might just be crazy enough to work. If it doesn't you might have to go the drill/easy out way.

Hopefully you know someone with a welder or there is a fab shop by you that might take pity on you and weld a bolt on to that for you for $5.

orcim > KayPee 09/17/2014 at 02:42

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I'm sure there's more experienced people here, but:

1) Grandpa (who, at the time, could fix anything brought to him because everything was user serviceable parts inside) taught me that tightening a little, if you can get it to move, will sometimes help loosening.

2) Can you dremel a slot for a slotted screwdriver with a square shank into the top? Make it fit the blade of the screwdriver exactly and then torque away.

3) Start drilling, then dremel grind the head off? If you nick the cover plate too hard, then just get a new one. It doesn't look like there's corrosion at work there, so if the head comes off and the tension is released, I'm assuming that the stud will easily turn out. (Reasonable assumption? Dunno. Wouldn't suggest this for a head bolt on the exhaust manifold side of the head.)

4) Being a "hole" already, do they make a backout bit that big that could bite into the screw and turn it out? Maybe with a little drilling?

5) Drilling out the screw doesn't have to result in armageddon. If you use low speed, watch the vectors and get tyhe correct size, you should be able to snap off the top via drilling without damaging any other component (the screw gets so thin it discorporates from the shank, pops the top under the torque and none of the underlying structure is affected.) Need a new/sharp metal bit for this.

6) Oh, and heat. Bring the thing to red and then try to back it out.

Decay buys too many beaters > KayPee 09/17/2014 at 02:44

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On the bright side at least it wasn't severely under torqued!

I just bought a bike that had the rear brake caliper totally out of its alignment slot (meaning it could only stop forward and stretch the brake line in reverse) Also the rear axle was torqued to 5 ft-lbs (spec is 70).

Jb weld a correct sized Allen key in there to get the bolt out, same thing happened to me on my old Yamaha virago.

KayPee > KayPee 09/17/2014 at 03:23

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Thanks for the suggestions guys! I'll be going through all of them and report back whenever I am able to take it out and give my Virago a proper oil change.

beardsbynelly - Rikerbeard > KayPee 09/17/2014 at 03:48

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bolt extractor socket. worth the money.

tc_corty > beardsbynelly - Rikerbeard 09/17/2014 at 05:00

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Ive never seen these before, only used easy outs. Gonna looks these up, any special name they're called or just bolt extractor socket?

EDIT: nope, just that simple name. Will be picking up a set to add to my tool box. Cheers buddy :)

beardsbynelly - Rikerbeard > tc_corty 09/17/2014 at 05:14

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the box in my shed says "bolt extractor socket set". Can't help you with where to get them from as my Dad gave them to me.

tc_corty > beardsbynelly - Rikerbeard 09/17/2014 at 05:18

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Thanks, yeah a quick search of my local store and they've got them and under that name. Cheers

Saloon_Hoon > KayPee 09/17/2014 at 16:15

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don't know if this was mentioned, but dremel / hack saw a slot into the head - remove with flat screwdriver (impact flat if you have one)

KayPee > KayPee 09/17/2014 at 23:06

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Drilled, heated, drilled again, broke off the top of the bolt and successfully got out the oil filter! Thanks everybody!