Removing a broken-off bolt without removing oil pan? - Vintage Mustang Forums

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post #1 of 30 (permalink) Old 02-01-2008, 08:17 PM Thread Starter
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A little back I had to pull my oil pan off(or at least I thought). Anyway, when putting it back on, I broke one of the bolts off in the block. While I do have an EZ Out set, my drill's chuck keeps hitting the oil pan which prevents me from getting the drill bit centered on the bolt. I REALLY don't want to have to pull the oil pan to get at this bolt. Does anyone have any ideas? I'll obviously pull it if that's what I have to do, but I thought I'd get your guys' thoughts first.

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post #2 of 30 (permalink) Old 02-01-2008, 08:26 PM
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Can you bolt up the pan without it? my 5.0, when I took it apart, had one or two broken pieces of block casting.. I'm just going to see what happens without a bolt or 2 in there (I smeared the cork gasket with RTV. and after 3 gaskets, when they kept sliding out, one stayed in there.
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post #3 of 30 (permalink) Old 02-01-2008, 08:29 PM
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Call a machine shop supply house, and order an extended, left hand twist bit. Or....... pull the pan.

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post #4 of 30 (permalink) Old 02-01-2008, 09:04 PM
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reverse drill bit was going to be my suggestion too, if you can find one long enough.

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post #5 of 30 (permalink) Old 02-01-2008, 09:06 PM
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Im with couped up and what I like to do is to drill a smaller pilot hole in the center of the bolt then use the left hand drill bit so the left hand bit will try and grab in the smaller hole and back the bolt out.
Something else I have done is if the bolt is broken off close to flush with the pan and its where you can get to it is to use a sharp pointed punch and tap it with a hammer in the direction to back it out and this really works pretty well the bolt probably isnt that tight it should come out pretty easily

I hope this helps Jeff
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post #6 of 30 (permalink) Old 02-01-2008, 09:08 PM
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Get a Dremmel with a flexible extension - that should do the pilot hole
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post #7 of 30 (permalink) Old 02-01-2008, 09:08 PM
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or buy a longer drill bit.
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post #8 of 30 (permalink) Old 02-01-2008, 09:12 PM
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Hey the dremel is a great idea if you use a 1/8"left handed drill bit in the dremmel then you might not need an extended bit at all it should fit in the 1/8 collet in the dremmel
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post #9 of 30 (permalink) Old 02-01-2008, 09:14 PM
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+1 Yea I like the Dremel idea too. And if your bolt isn't bound up to tight in the threads? You may be able to score a slot in the top of the bolt,using a small rotary file, so that you can try to back it out with a long thin screwdriver?

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post #10 of 30 (permalink) Old 02-01-2008, 09:24 PM
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yeah I have done that to
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post #11 of 30 (permalink) Old 02-01-2008, 09:28 PM
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Dumb question but is it leaking oil?

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post #12 of 30 (permalink) Old 02-01-2008, 09:35 PM Thread Starter
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I don't know if its leaking oil, but I don't really care to find out. Nor do I want to constantly have to check the oil out of paranoia that it could in fact be leaking. Peace of mind goes a long way.

Thanks for all the help guys, I will try all of these tomorrow. Has anyone ever actually had a Dremel up there? Seems to me like it would have the same problem as the drill: the dremel would hit the pan and keep it from being center.

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post #13 of 30 (permalink) Old 02-01-2008, 10:21 PM
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Use an automatic center punch to turn it out.

I seen a guy at work turn a broken of antenna stud out one time with a pick and a tool type engraver.

The engraver rattles the stud while you turn it with the pick.

If it's cross threaded disregard these methods.

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post #14 of 30 (permalink) Old 02-01-2008, 10:38 PM
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I normally do it with a hammer and a punch. I don't think the bolt is bottomed out so it should back out fairly easy. Just take the punch and tap it lightly off to one side. As it turns just keep going around the outer side of the bolt.

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post #15 of 30 (permalink) Old 02-01-2008, 10:59 PM
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Upside down laying on one's back wedging punches up into undersides of engines and trying to smack with hammer, or using drill bit in 10,000 rpm dremel tool?

Me, I'd just have a beer and wait for the oil spot to show up on the driveway LOL...

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