[Trip]

I was working on my car today and was trying to remove a bolt that had clearly been tightened with an impact wrench. So I was carefully trying to loosen it up and about 1/4 of a way into it, SNAP!! It's metric unfortunatley. Bolt is 6mm wide, about 14mm deep. Got about 3mm out and snapped about 2mm into the hole. So about 9mm remains inside the hole. Can't get to the other side of the hole. So only one way to the bolt. Oh yeah the bolt is going in upwards, so soaking it with lubricant will be hard unless someone wants to come hold my car upside down while it soaks. Any ideas on carefully removing what's left of the bolt without damaging the current threading and using the same size bolt.

 

[oldetymebiker]

Spray with a good penetrating oil and let it sit overnight (capillary action will draw it up into the threads) GO BUY A GOOD (Craftsman/Sears) set of Easy-Outs...drill out with the proper drill, apply the easy-out, and voila'....:luck:

The other option is to drill out the bolt, threads and all, and then install the proper size Heli-coil.

 

[Earlzach]

Or left handed drill bits. They will usually backout the bolt.

 

[jeeps84]

Or left handed drill bits. They will usually backout the bolt.

Its a little cheaper if it works.
Start with a very small bit and then go up in size as large as possible while staying small enough not to damage the threads. The bigger bit in the small hole should bite and hopefully back it out.

 

[No Worries]

PB Blaster spray and Sears easy-outs.

 

['73 H1 Triple]

Spray with a good penetrating oil and let it sit overnight (capillary action will draw it up into the threads) GO BUY A GOOD (Craftsman/Sears) set of Easy-Outs...drill out with the proper drill, apply the easy-out, and voila'....:luck:

The other option is to drill out the bolt, threads and all, and then install the proper size Heli-coil.

:iagree: One word of caution when using Easy-Outs. They are made of hardened tool steel. If you break it off - you're screwed :bonk:

I would strongly suggest using a tapping handle when using easy outs to apply even pressure.

:seeya: Jeff ( yes, I'm a machinist )

{edit} An excellent penetrating oil is " KROIL" . Best stuff I've found

 

[Gas Man]

All the same thing I would suggest!

 

[Trip]

Tried using an easy out. Drilled the hole as close to center as I could get with the amount of room I had to work with and the position of the bolt. I think I got it a little off center, but straight in. The easy out started to catch but then just started drilling out the bolt. Then the easy stopped catching altogether and would just twist in the drilled hole. I don't think I drilled the pilot hole deep enough. I am thinking of just drilling a hole 1 or 2 sizes down from 1/4" and rethreading and using a 1/4" size bolt.

 

[Gas Man]

I feel for ya man.. that is nuttin but "DA SUCK" :damn:

 

['73 H1 Triple]

Tried using an easy out. Drilled the hole as close to center as I could get with the amount of room I had to work with and the position of the bolt. I think I got it a little off center, but straight in. The easy out started to catch but then just started drilling out the bolt. Then the easy stopped catching altogether and would just twist in the drilled hole. I don't think I drilled the pilot hole deep enough. I am thinking of just drilling a hole 1 or 2 sizes down from 1/4" and rethreading and using a 1/4" size bolt.

Drill the hole deeper and try again.

The tap drill size for M6-1.0 is .199 dia. Try drilling the hole 3/16" ( .1875) You might luck out and free up the remainder of the broken bolt.

If you are going to change it to 1/4-20, use a 13/64" ( .203) drill

:seeya: Jeff

 

[DLIT]

If you can heat it without melting anything I'd do that, then drill or easy out that bitch while it's still hot. It all depends on the location though.:luck:

 

[standy]

Chances are that if the bolt broke while trying to remove it, an easy out is gonna break, too. Sometimes you get lucky, but in my experience with cars and motorcycles, I would say drill and re-thread it. Breaking an easy out off is a quick way to ruin your day.

 

[jeeps84]

Breaking an easy out off is a quick way to ruin your day.

Sometimes several days.

 

[Trip]

I ended up finding a heli-coil and drilling a bigger hole and putting one in, because I drilled out the original bolt and then tried to tap the original threads and finding they broke off. All is well now because it is not a real important bolt that holds a lot of weight.

 

[Gas Man]

What was the bolt for?

 

[Trip]

It holds a bracket for the left front bumper that is held by 4 other bolts as well. Probably didn't even need it, I am just anal about stuff like that.

 

[Gas Man]

It holds a bracket for the left front bumper that is held by 4 other bolts as well. Probably didn't even need it, I am just anal about stuff like that.

I understand that...I'm the same way!