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How to get a rounded bolt out????

This is a discussion on How to get a rounded bolt out???? within the Technical / Maintenance forums, part of the General Discussion category; I'm trying to get my wheel bearing off my 91 chevy, and the three 15mm bolts that hold it on ...

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    Official FSC mascot!!!!! PHATSPEED7X's Avatar
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    Question How to get a rounded bolt out????


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    I'm trying to get my wheel bearing off my 91 chevy, and the three 15mm bolts that hold it on have really been a pain in the ass. The third and final one decided it wanted to round off on my and now I don't know how the hell i'm going to get it off. Any ideas????

    -1953 3100- -1991 K1500- -1999 Ford Ranger-

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    Re: How to get a rounded bolt out????

    Well Snap On calls them spiral sockets. I know Sears Craftsman makes a set also. Basically they are a socket with sharp reverse flutes inside. You find the appropriate size and tap it over the rounded head of the bolt with a hammer. Using a ratchet (perferably with a long handle for torque) slowly try to take it off. The socket has reverse flutes so as you try to back the bolt out the flutes dig deeper into the metal. They work great and every tool box should have a set. To be honest I have three sets and use them extensively. Now you can break them if you're really torquing down, but if you get impact rated they rarely do. I have a set of Craftsman along with the Snap-on and they all work well - besides if you break it you can take it back to Sears as they warranty their tools.
    Last edited by tjk1812; 05-03-2008 at 04:14 PM.

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    Re: How to get a rounded bolt out????

    Thanks I'll have to pick up a set tomorrow.

    -1953 3100- -1991 K1500- -1999 Ford Ranger-

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    Registered User fastj14's Avatar
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    Re: How to get a rounded bolt out????

    Also, if you have access to a torch, a little heat never hurts.

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    Re: How to get a rounded bolt out????

    Quote Originally Posted by fastj14
    Also, if you have access to a torch, a little heat never hurts.
    you can use some heat - just be careful - too much heat and it will spread through the metal and the the wheel bearing grease can liquidfy. Also melt seals if its hot enough.

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    Re: How to get a rounded bolt out????

    The bearing is bad right? Just torch the sob off and get a new bolt. If you are taking the bearing out and trying to reuse it (why, I don't know?) use a grinder to cut the head off. Once you have the bearing out and on the bench it will be easier to work on getting the bolt out.

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    Re: How to get a rounded bolt out????

    bearing has 191K on it. I would like to replace it but I don't know how big my check will be on monday. I just need that bolt out tool set. I've been need a set like it for a while now.

    -1953 3100- -1991 K1500- -1999 Ford Ranger-

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    andrewdirt101
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    Re: How to get a rounded bolt out????

    at your mileage, its not worth repacking the bearing. i'd just put new ones in. they don't cost that much anyways, and its not worth the trouble to only repack.

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    Re: How to get a rounded bolt out????

    Quote Originally Posted by andrewdirt101
    at your mileage, its not worth repacking the bearing. i'd just put new ones in. they don't cost that much anyways, and its not worth the trouble to only repack.
    It's a hub assembly... Can't be repacked.

    -1953 3100- -1991 K1500- -1999 Ford Ranger-

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    andrewdirt101
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    Re: How to get a rounded bolt out????

    Quote Originally Posted by PHATSPEED7x
    It's a hub assembly... Can't be repacked.
    right... i forgot. you're 4x4.

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    Re: How to get a rounded bolt out????

    Got access to a welder?
    Weld a nut onto the bolt head (through the inside of the nut) and undo it.
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    Re: How to get a rounded bolt out????

    sears also has a set of grip-tite sockets, which are worth a shot.
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    Re: How to get a rounded bolt out????

    Quote Originally Posted by Da Burb
    Got access to a welder?
    Weld a nut onto the bolt head (through the inside of the nut) and undo it.
    That was going to be my suggestion.
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    Re: How to get a rounded bolt out????

    if all else fails just get out a vice-grip. If you screw up the bolt all that matters is you get it out. then go get a new one.. i have had the same problem on lots of things and i used a vice-grip each time and it comes right out.

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    Re: How to get a rounded bolt out????

    haha the weld a nut technique is a classic and a sure fire way to do it cheap!
    The Redneck Word of the day is Mayyonase,
    Mayyonase some big old tires on that truck!

  16. #16
    andrewdirt101
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    Re: How to get a rounded bolt out????

    if you're the least bit handy, you can just drill it out and retap the threads...

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    Re: How to get a rounded bolt out????

    Quote Originally Posted by blackbodylift
    if all else fails just get out a vice-grip. If you screw up the bolt all that matters is you get it out. then go get a new one.. i have had the same problem on lots of things and i used a vice-grip each time and it comes right out.

    yep, the parrot jaw kind. will grip on pretty much anything, accessability is the only question.
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    Re: How to get a rounded bolt out????

    I got it off by just pounding a old 14mm socket on it and hitting it with the old cheater bar. Now I'm waiting for the dealer to get me three new bolts...

    -1953 3100- -1991 K1500- -1999 Ford Ranger-

  19. #19
    javi05
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    Re: How to get a rounded bolt out????

    Quote Originally Posted by PHATSPEED7x
    I got it off by just pounding a old 14mm socket on it and hitting it with the old cheater bar. Now I'm waiting for the dealer to get me three new bolts...

    thats what i would have done also.. done this alot of times. just buy a new socket and be done.

 

 

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