Broke a bolt, how do I get it out?

I grabbed a few bolts at ACE because I was putting on a new water pump on the 231 that will be going in the jeep. I only really needed to replace on but I figured that they were cheap so why not put on new grade 5 hardware. The threads have a little corrosion so it was a little tight, but I could easily turn it with one hand on the wrench without much effort. Well, there was one in that box that wasn't grade 5 but I didn't check all the bolt heads before I put them in. The bolt ended up shearing off about 1/4" above where it goes into the block, not quite enough to get it out with vice grips.

It's a 5/16" bolt, with just that 1/4" sticking out. How should I get this thing out?

 

It's right on the front of the block and the engine is out of the vehicle on an engine stand so it's ridiculously easy to get to. I had to pull the timing chain cover off to get at the bolt (tore the gasket unfortunately) so access isn't a problem. Will ACE carry the easy out kit or should I try somewhere else?

 

One word of caution when it comes to "easy outs" or screw extractors, be very careful not to brake the extractor. They are hardened and can be very difficult to remove if broken off inside a broke bolt.

You might use a torch to add a little heat to help get the broke bolt out.

 

can you screw a nut on remaining threads and weld the inside of nut to bolt?

 

Even if you can't screw a nut onto the bolt. Find a nut that is a little bigger like 3/8" and hammer it onto the bolt. Then weld it onto the end of the bolt and let it cool. This would be the easiest solution. Either stick or MIG welding it will do.

 

Can't get a nut on it, the threads are pretty screwed up from using the vice grips.

 

Couldn't you grind two flats to make the vice grips hold better?

 

Putting a groove in it should would, I'll give that a try.

 

I typically drill a hole large enough not to come into contact with hole threads and then grind 4 sides on a grade 8 bolt and drive it into the hole and reverse. This works 99% of the time for me. We won't talk about the other 1%. Best of Luck.
:v6:
BenF

 

Always do with those cut off wheels. I had one break and hit me square in my forehead. It drew a little blood but if that was an eye without glasses it would have probably blinded me.

 

X2


Weld a grade 8 3/8" nut onto the broken stud and back it out.

Or drill

 

One you get this bolt out run a tap thru the hole to clean the threads out.

 

I was planning on it. I need an excuse to buy a tap set anyways.

 

Find a nut that will slide over the threads and weld the heck out of it, then use a wrench and remove it.