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alright, i snapped off 2 of my header bolts and i need to remove/replace them

heres what i need to know, when i open up the exhaust manifold i need to take out the bolts from the back but they are slightly welded in place... what is the best way to remove the bolts (to get through the welding i guess) ???

 
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blow torch

 
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im thinking some sort of saw

 
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is there any way to find out the size of the bolts that are supposed to be where the blue lines are??? or do i just have to take them out and match it up

 
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Good luck sawing through a weld, youre gonna have to use a blow torch

 
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the way he described it it sounded like they werent really welded on all that well

 
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Call some different mechanic shops. They should have a specialize tool to remove it. Its a reverse drill bit that they use to drill into it and then they just use another nut to screw into it and there you go......

You could buy it yourself but those bits cost hundreds for a set.

 
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sears sell some special bolt that allows you to remove strip bolt.

 
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sawzall, ie dewalt reciprocating saw with metal cutting blade. if they are just tack welded, you could probably knock them lose with a light tap with a hammer or something of that sort. thats how my father removed some tack welded bolts from our domestic project car i am helping him work on, he was a mechanic at one time, and was also a welding instructor where he used to work, not sure if i'd take that risk if you arent too sure about that though. you could always hire someone to do it for you too.