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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115500 05/25/19 02:24 PM
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large Stud extractor

Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115504 05/25/19 02:28 PM
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I would try a 12pt hammered socket first. ( don't bend the pan though.)

Then a large enough vise-grip or small pipe wrench.

If above does not work , mig weld a nut on it.

Last edited by spasm3; 05/25/19 02:29 PM.

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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115515 05/25/19 02:35 PM
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I had this happen on my Subaru. I used med sized vise grips. It was soft metal and they grabbed nicely. The reason they rounded it off. Used to be 17mm IIRC then they went to 14 MM but with the same large bung thread.

I was going to get a grinder wheel on a small E- Drill and grind it down to the next smaller size.

I bet the vise grips may work. Hammer on it. The Impact loosens it up


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Re: Rounded off oil drain bolt - How to remove? [Re: supton] #5115521 05/25/19 02:39 PM
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Originally Posted by supton

I wonder if, if you lack tools for this, if it's just not easier to pay a mechanic to do an oil change, with fair warning to him.


Bring him a new drain plug to install.

Make him bring you the old one.


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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115539 05/25/19 02:58 PM
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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115553 05/25/19 03:12 PM
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I used a left hand drill bit to extract a bolt before, easy enough for a steady hand.


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Re: Rounded off oil drain bolt - How to remove? [Re: KrisZ] #5115566 05/25/19 03:21 PM
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Originally Posted by KrisZ
I would use one of these, provided there is room. Tightens as you apply torques so you know it will not let go of the bolt.

[Linked Image]

Large vice grips might also work, but you have to make sure they are on square and very tight, otherwise you will mingle the bolt even more.


This

Re: Rounded off oil drain bolt - How to remove? [Re: 2dogs] #5115574 05/25/19 03:28 PM
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Trav Offline
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Originally Posted by 2dogs

+1 That is what I would use first, the HF should be good enough for a couple of uses. A better quality tool will last longer but at least the HF goes to 19mm.

Edit: Never mind I see you already tried them, go with the pipe wrench or Cobra's.

Last edited by Trav; 05/25/19 03:30 PM.

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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115634 05/25/19 04:27 PM
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Larger vise grips and make them super-tight to close.


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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115637 05/25/19 04:29 PM
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10 or 12 inch Knipex Cobras. Make sure the lower jaw is on your right side.

Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115732 05/25/19 06:11 PM
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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115767 05/25/19 06:47 PM
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You will need a special socket for rounded off fasteners. 2nd consideration is why it's rounded off. Did someone use an impact wrench? Then it's pounded on, and rounded off. Who knows what conditions the threads might be in.

Get a new magnetic drain plug and the washer. You may also need a thread repair kit by the time you get this removed.

[Linked Image]


[Linked Image]


Last edited by OnTheRocks; 05/25/19 06:48 PM.
Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115771 05/25/19 06:51 PM
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Leave it alone and suck the oil out the dipstick tube from now on.

Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115787 05/25/19 07:13 PM
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The Irwin Bolt Grips that OnTheRocks posted.

Use a short handled sledge to whack the right one on. It will get that plug out, without fail.


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Re: Rounded off oil drain bolt - How to remove? [Re: spk2000] #5115961 05/26/19 12:51 AM
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If you raise the front end of your vehicle, and support with jack stands, you may not be high enough off the ground. Crawling under, with less than 12", does not allow you to be in a good position, or use longer tools with more leverage. Sometimes, reach and access is limited when you're trying to use power tools. When you have the vehicle up on a lift, you can stand under it. This allows you to plant your feet in a wide stance, get your body behind the tool, or maybe use power tools. Think about an impact tool. You may also need some sort of universal joint to give you the correct angle.

I would also worry about the condition of the threads after you get the drain plug out.








Last edited by OnTheRocks; 05/26/19 12:54 AM.
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