Ft Seat/Broken Bolt/ Broke Easy Out/ Cobalt Drill Bit ?? - JeepForum.com
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post #1 of 16 Old 06-02-2012, 08:39 PM Thread Starter
hdrocknroll
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Ft Seat/Broken Bolt/ Broke Easy Out/ Cobalt Drill Bit ??

When I got the ZJ the front left seat mounting bolt on the drivers seat was broke off.
I had to replace the seat because it was trashed, I got the other bolts out.
I drilled a hole and ,used an easy-out, that was actually too small for the job. So I broke it off.
The seat wiggles around the little, with only three bolts, so I need to fix it.
I tried drilling after I broke the easy-out, but . The easy-out is hardened steel so a regular drill bit won't cut it.
My question is, do you think a cobalt drill bit will work to drill out the easy-out ?
OR should I drill a different hole and tap it out ?
OR Any Other Ideas ?


Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #2 of 16 Old 06-02-2012, 09:04 PM
JasonStebbins
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I'm confused. By easy out you mean the sockets with the spirals inside to remove rounded-off bolts? How did you "break" it? And you want to drill out the entire thing now including the bolt?

I would just drill and tap a new hole near that one.
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post #3 of 16 Old 06-02-2012, 09:14 PM Thread Starter
hdrocknroll
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Quote:
Originally Posted by JasonStebbins View Post
I'm confused. By easy out you mean the sockets with the spirals inside to remove rounded-off bolts? How did you "break" it? And you want to drill out the entire thing now including the bolt?

I would just drill and tap a new hole near that one.
You know, the head has snapped off a bolt,so you drill a hole in the center of the bolt then insert an easy-out/ screw extractor, which kind of looks like a drill bit, with spirals on it !!

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #4 of 16 Old 06-03-2012, 08:20 AM
jaguarjoe
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The seat belt system on your Jeep should be warranted forever. It's that way on a lot of other vehicles too. Call the stealership and start there. Let them do the dirty work.

The emissions system is warranted for 50,000 miles. That includes sensors tied to the PCM, the PCM itself, cat converter, and probably much more that I can't think of. That's why heated O2 sensors were invented. Generally HO2's don't die before 50,000, a lot of unheated units did/do.

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post #5 of 16 Old 06-03-2012, 09:07 AM
Dyn0mitemat
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If you want that bolt out you'll either have to get a carbide drill bit or grind it out

09 Rubi 2dr:MetalCloak2.5", 37"MTZ's/Slabs, EVO Stff, ORFab Cage, Chromo's, Driveshafts etc
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post #6 of 16 Old 06-03-2012, 10:59 AM
Foundrydude
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Switch your thinking. I beleive the bottom of that bolt is a square metal tab spot welded to the floor.

Attack the spot welds with a grinder/dremel or chisel to weaken them, then hit from the topside to knock it loose.

I have also had success with just giving them the mother of all hammer hits from the topside, no grinder or chisel, the spot welds fail without much damage to the floor. If the floor moves, just move it back

You'll have to use a normal nut.

good luck
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post #7 of 16 Old 06-03-2012, 02:38 PM
gearheadnick
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Once an easy out is broken, it's nearly impossible to get the broken part out. I stopped using them since I've broken every single one I've ever used. I would take Foundrydude's suggestion, and remove the bolt tab from the floor with a spot weld cutter or an appropriate sized drill bit. Assuming you have access to a welder, remove the old nut, weld in a new one, and reweld the tab back to the floor.

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post #8 of 16 Old 06-03-2012, 04:41 PM
Foundrydude
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The tabs are welded to the floor for ease of assembly, there is no need to weld a nut back in place or anything like that. Just use a regular nut, it's a little more clumsy to assemble but that's it.
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post #9 of 16 Old 06-03-2012, 07:39 PM Thread Starter
hdrocknroll
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Problem is ,As far as I know ,there is no access to the back side of this particular location,
(driver seat Lt Ft mount/bolt) unless there is an access hole under the carpet.


Side View

img_20120603_210814.jpg

Front View

img_20120603_210857.jpg

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #10 of 16 Old 06-03-2012, 08:11 PM Thread Starter
hdrocknroll
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Now I'm thinking, drill an access hole on the back side of the little hump,
twist the weld nut off, put on bolt, washers and nut.

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #11 of 16 Old 06-03-2012, 09:36 PM
timmay5309
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:: Subscribed :: My passenger seat has the exact same problem with a broken bolt and I have delt with it for the past 8 years... Curious what others have done to remedy it...
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post #12 of 16 Old 06-04-2012, 12:01 PM Thread Starter
hdrocknroll
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How about it.
Are there any access holes in the little hump???
Some one must have had there carpet out

Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


Quote:
Originally Posted by rooster51 View Post
Whats the worse that can happen? Your jeeps already broke.


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post #13 of 16 Old 06-04-2012, 01:45 PM
gabrod72
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If you got some easy outs that were made in Asia, then just find a suitable American made bit. Sears has some nice ones or you could get some titanium tipped ones. The key is to drill slow and while applying constant speed and pressure. Also, you can have someone spray small amounts of WD40 while you drill.

If you got some American made easy outs, then you'll probably need the cobalt bits... but not Asian ones. Just like steel, not all cobalt is created equal.

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post #14 of 16 Old 06-04-2012, 03:51 PM
98mopar
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I have had great luck with bolt extractors. The good ones, like posted above.

I think the key is to be fast with them. When you drill the hole, it heats it up pretty hot. Then I put the extractor in and hammer it down. Then I pull it out. I have had good luck that way.

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post #15 of 16 Old 06-04-2012, 04:14 PM
Foundrydude
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Quote:
Originally Posted by hdrocknroll View Post
Now I'm thinking, drill an access hole on the back side of the little hump,
twist the weld nut off, put on bolt, washers and nut.

You answered your own question!

memory says there are some holes in that reinforcing rib but I'm not sure if they're anywhere that will help ya. No big deal to drill an access hole though.

It's kind of suprising that bolt broke. Usually they only break when the threads are rusty from being exposed to the road or they bind up from being slathered in undercoating.

Wonder if it was cross threaded from the factory.........

good luck
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