Best way to remove broken fender bolt?

I broke a fender bolt yesterday. Guessing it was rusted onto the nut.

Should I get some PB Blaster to spray on the broken bolt. and let it soak in well? Then get a small drill bit, to drill a small hole, so I can use one of those bolt/screw extractor's, to try and remove it?

Has anyone ever removed a broken bolt, by removing it from the other end, as if I was pushing/unscrewing it through, from the back side (Since there is no bolt head anymore)?

 

If you have the bolt sticking out on the other side, you could use vice grip and get it out

 

Your first thought sounds like the right idea, if there is enough to grab on the other side, maybe soaking and vice grips might get the job done. Good luck.

 

@TILLY Thank you.

 

Anytime.

 

I usually end up drilling them out. Cobalt drill bits on low speed with lots of pressure. Spray it with lubricant as you go. If it's exceptionally stuck, I'll progressively use larger bits until there isn't much material left to the threads and it's can collapse inward. Don't use too close a size or it'll bind easily. Also make sure you have a handle on your drill and get a good firm grip. Alternatively, partially tapping it can allow you to thread a bolt in to turn it out.

Hopefully it doesn't come to that though. Good luck with the vice grips.

 

You could try heating the broken bolt with a torch. Make sure there is no plastic or rubber near the heat or you might have to cover the plastic with aluminum foil or a wet rag to keep them cool. Also if you can get to the the other end of the bolt you may want to try putting an ice cube against just the heated bolt. The thermal shock helps to loosen the rust. You may have to thermal shock the bolt several times to get it out. Also hitting the bolt with a punch will help to loosen the rust after you thermal shock it.

 

DO NOT USE AN EXTRACTOR!

Seriously, they aren't made for seized bolts and you'll end up in a whole different problem.

A little heat, a little lubrication, and if you have some left twist drill bits is the way to go.

 

You got the big boy lift on there.

 

I had a friend grind it off with a flappy wheel. Then just welded a new nut on. I'm thinking of buying a harbor freight welder and starting to learn. It comes in handy.