Broken bolt in block under throttle body adapter - what now ?

Lucky me the last bolt I broke off left the remainder loose but recessed in the hole. Sprayed oil in, and used the broken off head as a "key" to unscrew the broken shaft.

Love when hat happens.


u know that might work if he uses his longest bolt as a key.
 
if the bolt is sticking out at least 1/4 inch
craftsman makes an extractor set that goes over the bolt and will turn it right out.
the set is numbered 1-10
on ebay but i was not impressed with the ratings of the sellers.
if u r interested i can set u up with a link.
 
Lots of the Chinese ones on eBay
USA
https://www.ebay.com/itm/10pcs-Damaged-Nut-Bolt-Remover-Stud-Extractor-Set-Broken-Screw-Removal-Tool-Set/143362975170?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D57928%26meid%3Dbdbc7d63c7c74fe48f0c0dec8c358465%26pid%3D100005%26rk%3D2%26rkt%3D12%26mehot%3Dco%26sd%3D323904203708%26itm%3D143362975170%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100005.m1851

Oz
10pcs Damaged Nut Bolt Remover Stud Extractor Set Broken Screw Removal Tool Set | eBay





And or one of these kits
USA
Craftsman Drill Extractor Set Extracting Broken Bolts and Screws w/ Plastic Case 696306821977 | eBay

Oz
https://www.ebay.com.au/itm/Craftsman-Drill-Extractor-Set-Extracting-Broken-Bolts-and-Screws-w-Plastic-Case-/183756863852?_trksid=p2349526.m4383.l4275.c10#viTabs_0
 


A simple cheapo method would be to tap a tight or slightly too small hex socket over the stump and use you 3/8 or 1/4 inch drive to remove.
 
I also found this:
My bolts and gasket are on the way, so I guess I'll drop the sump when I feel like it and see what I'm in for.
Got lots of good advice to keep me on the right track!!!

Irwin seems to have nice sets. And I think I can get those at Ace Hardware one size at a time.
 


i don't know about that tool ?