Sheared bolt in ally block - suggestions?

[maf260]

Whilst removing the oil filter housing on my M52 E30 one of the bolts has sheared. About 3-4mm is standing proud of the aluminium block. I've tried mole grips to no avail, it's also in a slightly awkward place, so getting Stillsons or heat (very close to an open oil way) looks difficult/impossible.
I don't have a welder, so cannot weld a nut on to the sheared stud.

All suggestions/advice welcome, thanks.

[daimlerman]

You have a problem!

I think(dangerous!)that I would try my blow torch on the damaged stud and surrounding area.
My reasoning would be that I could not make it any more difficult than it is already.

And the stud might,just,agree and wind out....

[maxfield]

I'm assuming its an M 8 thread? If so knock one of these on it after spraying wd40 on

http://item.mobileweb.ebay.co.uk/viewit ... 5613367621

[maf260]

It sheared whilst I was removing it. I've heard that these extractors are useless and often shear off as well! I'm going to try some heat and go from there.