Thread: Removing sheared bolt (aka i'm screwed) (added picture)

Sometimes it helps to weld a bolt onto the broken part, and then you simply unscrew as usual. Worth a try, maybe?
Cheers

Originally Posted by Jojo

Sometimes it helps to weld a bolt onto the broken part, and then you simply unscrew as usual. Worth a try, maybe?
Cheers

In theory its a very good idea, my cousin and I did this on his Toyota not long back.

The sad reality however is my welding skills (and I only have an electric welder) leave a lot to be desired.

To be honest I think I'm rooted. It's not coming out and I'm likely to wreck the head in trying any harder.

i have one of those stupid power steering reservoirs under my merc's bonnet also.
well to your problem, looks to me that you have an iron cylinder head, not alloy, if so that makes it easier to fix.
brian has part of the fix in his reply, sorry brian, i think it would be better to drill the piece out to maximum size and then try to tap the remaining bits out of the thread.
why- well i think the picture shows that the part is brass, please correct me if i am wrong, brass is crap to remove in this situation, as brian said, don't even think about easy outs, they are better used for throwing at noisy crows, or filling scrap baskets.
drill it carefully to the maximum size you can, be careful as i suspect it is a taper thread, so at the bottom of the thread it will be smaller diameter than the outside.
of course if you source a replacement to the broken bit you can check it's size first, and you may need to source a tap to do this, see brian, that is right up his alley.
good luck,

Originally Posted by Jojo

Sometimes it helps to weld a bolt onto the broken part, and then you simply unscrew as usual. Worth a try, maybe?
Cheers

gidday johannes,
any developments on trotting back to aus?

Thats like a girl I once knew. German, dirty, topless and...........


That wouldn't be brass would it?

Originally Posted by dobbo

Thats like a girl I once knew. German, dirty, topless and...........


That wouldn't be brass would it?

Lucky man, I've never had a dirty topless german girl.

Yeah Dobbo, just checked the other one (which removed cleanly funnily enough) and it is brass.

Head is iron thank the f - expletive.

Anyone know the size of the bolt. if its German it probably metric. Its a hollow bolt which means it will be very easy to drill out. You need to find out what size the bolt is. Then you need to drill it out with the Tapping drill required for the bolt. NOT THE CLEARANCE DRILL!. Once you do that the remaining thread will pretty much fall out. For example:

If it was An M10 Bolt.

OD is 10.0mm
Pitch (usually) is 1.5 mm

OD - Pitch = 8.5.

Drill out with 8.5 mm drill bit.


EDIT:
As lochie said, build up to the drill size required, don't just drill it out in one go.

B92 8NW Try and obtain some ZEP 45 ,its updated WD 40, comes in a spray-pak.If you are close to Bayswater Fred Smith will have some.The idea is to douse the bolt and leave for a while. May need a couple of applications. Also check out some of the newer types of easy-outs as over the years many jobs have been stuffed due to broken easy-outs.The other previous to drill is also viable, gradually increasing the drill diameter.Best of luck Lochie