Best removal tool for rounded bolt heads ?

Weld a nut on top of it if possible. The heat will probably help too. I'd give it a couple a shock whacks with a BFH first.

Yeah done all that stuff on bolts I could get too,, cant get to these bolt heads easily

Yeah FERD,s the next option ,, nope its in a tough spot , but may be able to apply heat to the bolts,,

Well, they make a set of sockets just for that purpose. They are tapered on the inside and have spirled teeth cut on the inside, do that as you put torque to it, it tries to pull itself further on to the bolt head. I have found whacking on the breaker bar over the socket helps in this process tremendously. Not sure where I got mine, but, I suspect NAPA.

If all else fails, centerpunch as near dead center as you can get the top of the bolt and start step drilling until the bolt head comes off. remove motor head and then remove remainder of bolt, with pipe wrench if necessary

Edited by LouSWPA - 31 Mar 2019 at 2:51pm

Coke he didn't say he used a 6 point socket, he said it was a 6 point 12mm socket bolt head. probably used a 12 point 12mm instead.

Edited by chaskaduo - 31 Mar 2019 at 3:06pm

This is a pretty good tool! 

Edited by CrestonM - 31 Mar 2019 at 3:36pm

Titan stud remover

I like this approach, heat at first sign of it being a stubborn one, then apply beeswax, and let it wick into the area where the bolt meets the object that it is stuck in. (closest spot to threads) if as I understand it this is a hex socket cap screw, you may be able to use the salvage sockets, on the outside of the bolt. If its a small bolt, hit it with a 1/4 drive air impact.  If you can get it to move, even a little, use your favorite penetrating oil and keep using the impact.  Problem with the salvage sockets, is most of them have a one way twist, on them (to use counter clockwise), and you can't go back and forth like you could with a standard socket... Kinda like a catch 22, here...

Edited by DiyDave - 31 Mar 2019 at 6:06pm

An extractor set like these:

So these really work in this situation? May try it gonna heat them up first!

Doug did you ever gets that rounded head bolt out. If yes, how did you get it out?

Yes I did,, used heat and had to take more parts of the car apart to get to it to use an air wrench,, then used a bolt removal tool kit , and it was half way inbetween the sizes, soooo wore the bolt head down with an old socket then hammered the removal socket on - finally bit and spun it off , an hour job took 4 , but Im used to that !

I hear ya there!