Broken bolt pulling techniques.

[Piddy]

Here's what happened. I was taking my car apart to get the dumb turbo out.... and there was a series of bolt snappings along the way. The one I'm concerned about is the one that holds my heat sheild to my exhaust manifold. It broke of flush with the manifold.... so there is no way to pry, twist... etc. Anyone have any tips of taking bolts out that are broken in this manner? Thanks!

PS. I'd like to keep drilling it out as a last resort.

[Toysrme]

If the head of the bolt snapped off (only the shaft is left) and it's not rusted in; there won't be any tension to keep it from spinning.

Take a small, stiff wire brush (like from a dremel), apply pressure and spin it out.

[Tommy]

if its stuck in there, youll have to drill it out, then re-tap it to a bigger size, but you could just leave it off, if its anything like mine, there are like 20bolts on that thing, Im a firm believer in the 2/3's rule

[Toysrme]

^ Eh I'm not. *note* I have no exerpaince with that motor, but the above is why the gasket for my buddies 400hp awd celica blew the entire legnth of the manifold!!!

(Seriously, you could see the exhaust blowing out of the entire length of the gasket and when you tuened it off you would see the little bit of fuel/exhaust mix run out of it)

[Tommy]

well, thats a manifold, we're talking about a heat sheild, not exactly critical for it to have all its bolts like a mainfold.

[Toysrme]

My bad I mis-read that. I thought he meant the manifold itself!
Eh, it's a heat shield so who cars. Use the 2/3 rule by all means!

[Piddy]

Its right on the edge tho.... i guess i'll leave it unless it starts making an annoying noise.

[dexter_5000]

you can get an a craftsmen drill drill out. if you can get in there wth it.

[Deep]

Grab an easy out for a couple of bucks.

[TcmaBoy]

There are also extractor sets that consist of a drill bit, a bit guide, and a shaft. You drill a hole that is smaller than the bolt shaft. Then you hammer a splined shaft into the hole. There is a sleave that slides over the splined shaft and fits a wrench. Simply turn and out it comes. I've got a set and they work rather nice. No thread damage.

[shwartz be with]

I've always been told to heat it with a torch, then pound a phillips screwdriver into the end of it. After you pull the phillips out, pour cold water on the bolt area to make it contract quicker than it would if you let it cool on it's own. This will usually break any rust or corrosion holding the bolt in place. Then hopefully it's loose enough that you can put the phillips back into the dent you made in the head of the bolt and just turn it out.

[aosmith]

go to the hardware thing and they have a squarish thing that goes in a drill, you drill a small hole shove it in and itll twist the bolt right out