So I have a 94 accord project car Im workin on as we speak. I realized one of the valve cover bolts were broken off. I took the valve cover off and bought new bolts but I cant seem to extract the broken off part of the bolt out of the bolt hole...
Every drill bit seems to break that I use to drill into the broken bolt... Any ideas??? thanks

 

Cut a slot in the top of the remaining stud using a hand grinder and a hobbiests cut-off wheel. I've got hanging around a dremel Moto-Tool and bit set which found it's way into my tool box from prior tinkering with RPV's. You can use a screwdriver and a pair of Vice Grips if you're lucky.
Applying some heat (and I mean "some (not a lot)) may help the extraction process.

Hopefully this stud isn't stripped in the bore and broke off.

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">Cut a slot in the top of the remaining stud using a hand grinder and a hobbiests cut-off wheel.
You can use a screwdriver and a pair of Vice Grips if you're lucky.
Applying some heat (and I mean "some (not a lot)) may help the extraction process.
Hopefully this stud isn't stripped in the bore and broke off.
P</TD></TR></TABLE>

Its not as easy as just cuttin a slot in the top of the remaining stud..... That is solid metal. I broke three bits trying to drill a hole in it to fit the extractor in. I need some sort of strong strong drill bit that is made in 1/2 to 3/4 inch thick.

I cant use vice grips because there is nothing to grab. It broke off flush where the hole starts.

Its not stripped I know that but it is in there pretty good. The dumb *** who tightened it did it way more then needed...

 

Then the only recourse is grinding the stud flat, center punching the stud and use a carbide tips drill bit using a slow rotational drill and some cutting oil.
(and a "Good" EZ-Out Bit.

I love the term "high speed bit" it's so mis-leading.

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">Then the only recourse is grinding the stud flat, center punching the stud and use a carbide tips drill bit using a slow rotational drill and some cutting oil.
(and a "Good" EZ-Out Bit.

I love the term "high speed bit" it's so mis-leading.

P</TD></TR></TABLE>


HOLY CRAP YOU'RE BACK?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">Then the only recourse is grinding the stud flat, center punching the stud and use a carbide tips drill bit using a slow rotational drill and some cutting oil.
(and a "Good" EZ-Out Bit.

I love the term "high speed bit" it's so mis-leading.

P</TD></TR></TABLE>

Right on, thanks ill try that and see how it goes. your pretty well known on this forum huh??

 

I've been known to lerk (or is that lurch?) from time to time, yes

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sony224422 &raquo;</TD></TR><TR><TD CLASS="quote">


HOLY CRAP YOU'RE BACK?</TD></TR></TABLE>

. And at full swing! Look at all his informative posts already!

 

Yes, he has helped me tremendously already. I have gained a lot of knowledge.

 

Sears sells two types of extractors that fit directly into a reversible drill, so far, knock on wood, I have been able to get every broken stud out that was not an exhaust stud.

One set is just a hard left hand drill bit, the other is a left hand drill bit with the extractor built on to the drill bit. They come in pocket sized black cases with four bits each I think.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Duane_in_Japan &raquo;</TD></TR><TR><TD CLASS="quote">Sears sells two types of extractors that fit directly into a reversible drill, so far, knock on wood, I have been able to get every broken stud out that was not an exhaust stud.

One set is just a hard left hand drill bit, the other is a left hand drill bit with the extractor built on to the drill bit. They come in pocket sized black cases with four bits each I think.</TD></TR></TABLE>

I think I found what you were talking about.. Just waitin for the next nice day so I can go try them!!! Ill let ya know if it works or not.

OH and P-ADAMS its lerk!! you got it, ha. thanks for your advice also. PPl say good things bout you on here..