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Old February 23rd, 2013, 02:51 PM   #1
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Default best way to remove broken exhaust manifold bolts

Yup I did it. I broke them all. What is the best way to get them out?
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Old February 23rd, 2013, 02:52 PM   #2
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application?
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Old February 23rd, 2013, 02:55 PM   #3
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Amc 360
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Old February 23rd, 2013, 03:03 PM   #4
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I prefer to weld a nut to my broken studs.
The heat/welding current seems to loosen broken bolts real nice like.
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Old February 23rd, 2013, 03:04 PM   #5
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that would help if i had a welder -.-
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Old February 23rd, 2013, 03:15 PM   #6
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Option #2, go buy a welder.

Need more info. Are they broke flush? Is part of the stud sticking out to where you can get a hold on it?
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Old February 23rd, 2013, 03:19 PM   #7
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there is about 1/4'' of each one sticking out.
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Old February 23rd, 2013, 03:19 PM   #8
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If you can get vice grips on them I would heat the head with a torch, the stud should back out pretty easy.

If not you could try easy outs. But I hate using them, never had much luck.
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Old February 23rd, 2013, 03:21 PM   #9
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I'll give it a shot
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Old February 23rd, 2013, 03:24 PM   #10
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Is the manifold on the engine? IF it is take it off and try and grab what is left of the stud with vice grips. Heat with a torch and melt some candle wax in the threads. Seems to work good. I have had luck with this a few times.
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Old February 23rd, 2013, 03:24 PM   #11
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I have gone through this twice now; once on a 4.3l chevy and once on a Bronco with a 351w. Both times I ended up having to center punch the stud and drill them out starting with a small bit and working my way up to the size I needed. Then I tapped the hole and put in a new stud.
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Old February 23rd, 2013, 03:26 PM   #12
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Just be careful turning the stud. I usually lightly tighten and loosen the bolt until you can feel it turning. With the heat the bolts will snap off a little easier. But just work it back and fourth and you shouldn't have any problems. Heat is amazing.
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Old February 23rd, 2013, 03:31 PM   #13
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Quote:
Originally Posted by pitbull2332 View Post
Is the manifold on the engine? IF it is take it off and try and grab what is left of the stud with vice grips. Heat with a torch and melt some candle wax in the threads. Seems to work good. I have had luck with this a few times.
Never used candle wax. But we used to use toilet bowl ring wax stuff and that worked like nothing else I have ever come across. I would imagine the candle wax works very similar. The heat just sucks the wax right into the threads and it doesn't really burn off or evaporate like wd40 or PB blaster would on heat.
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Old February 23rd, 2013, 04:59 PM   #14
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Mix acetone and ATF 50/50 and use that as a penetrating oil.
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Old February 23rd, 2013, 05:06 PM   #15
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Heat them up,melt bee's wax around them and use bolt extractors.
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Old February 23rd, 2013, 05:25 PM   #16
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x (alot) on using heat and wax. Works wonders
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Old February 23rd, 2013, 05:30 PM   #17
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Quote:
Originally Posted by chadcooper55 View Post
Mix acetone and ATF 50/50 and use that as a penetrating oil.
X2
This works great.
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Old February 23rd, 2013, 05:40 PM   #18
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every one here is right but would have to agree with bishop the most because all methods mentioned are tried and true and my experince agrees easy outs are not so easy
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Old February 23rd, 2013, 05:54 PM   #19
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I have had decent luck by drilling a relief hole in the center. Heat the hole area hot hot. Take cold water and cool it as quickly as possible. Wax works real good as well.. good luck
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Old February 23rd, 2013, 06:07 PM   #20
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well i managed to break them off deeper into the head... Turns out they use hollow bolts. looks like my job got easier
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