3.8 07 header bolt is broke, Looks like it snapped - Jeep Wrangler Forum
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Old 03-08-2014, 04:57 PM   #1
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3.8 07 header bolt is broke, Looks like it snapped

Ok just finished fixing cracked header on drivers side, So i replaced spark plugs. I cleaned crack and put quick metal on it and it worked but smelled like someone died and smoked but it is good.
So was looking to replace passenger side plugs and I see the bolt closest to the windshield that is on the heat shield is gone, Never even been on that side to do anything. So I didn't change plugs don't want to hit or make the header loose it is fine.
I have flowmax muffler shipping and wonder if there maybe back flow that will mess it up.
Has anyone had there header bolt snap and what is the best way to replace.

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Old 03-08-2014, 07:16 PM   #2
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Is there any bolt sticking out where you can get a hold on it ?
You may be able to use a prick punch ( OK.... Center punch ) and drive it in the loosen direction very carefully....It's a time consuming job.
Try drilling it out, if you can get a good center hole.
The last resort here is to get a oxy/Acetylene cutting torch and burn it out....
Don't worry The torch will not ruin the Cast Iron of the Cylinder head.
I have removed lots of broken bolts from Heads and blocks, it just takes time and work slow so you do not ruin the head or whats left of the threads..
Iffff you can get the head off, you could melt a little candle wax on it and then try to turn it out....I have found that Candle wax works much better than most penetrating oils
on Head bolts and Exhaust bolts....Good Luck .. "BH"

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Old 03-09-2014, 06:17 AM   #3
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Quote:
Originally Posted by Baby Huey View Post
Is there any bolt sticking out where you can get a hold on it ?
You may be able to use a prick punch ( OK.... Center punch ) and drive it in the loosen direction very carefully....It's a time consuming job.
Try drilling it out, if you can get a good center hole.
The last resort here is to get a oxy/Acetylene cutting torch and burn it out....
Don't worry The torch will not ruin the Cast Iron of the Cylinder head.
I have removed lots of broken bolts from Heads and blocks, it just takes time and work slow so you do not ruin the head or whats left of the threads..
Iffff you can get the head off, you could melt a little candle wax on it and then try to turn it out....I have found that Candle wax works much better than most penetrating oils
on Head bolts and Exhaust bolts....Good Luck .. "BH"
I guess I need to find out if I can unbolt it at the bottom and then pull it off there should be plenty of bolt to grab. But thanks.
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Old 03-10-2014, 04:35 PM   #4
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Quote:
Originally Posted by Baby Huey View Post
Is there any bolt sticking out where you can get a hold on it ?
You may be able to use a prick punch ( OK.... Center punch ) and drive it in the loosen direction very carefully....It's a time consuming job.
Try drilling it out, if you can get a good center hole.
The last resort here is to get a oxy/Acetylene cutting torch and burn it out....
Don't worry The torch will not ruin the Cast Iron of the Cylinder head.
I have removed lots of broken bolts from Heads and blocks, it just takes time and work slow so you do not ruin the head or whats left of the threads..
Iffff you can get the head off, you could melt a little candle wax on it and then try to turn it out....I have found that Candle wax works much better than most penetrating oils
on Head bolts and Exhaust bolts....Good Luck .. "BH"
DUHHHHH, do not use the torch method if you have Aluminum Heads...
I should Have clarified that......Sorry guys.... "BH"
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Viet Nam Veteran 69-70, Troop "D" (AIR) 3/4 Cav. ,25th Inf. Div. CUCHI RVN. UH-1H Crew Chief of the "Pinball Wizard" 68-16224. Call Sign "CENTAUR".
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Old 03-10-2014, 07:35 PM   #5
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If you remove the header and there is a nub of the bolt remaining; you can try threading a nut onto the exposed threads and then weld the nut to the bolt nub. The heat of welding the nut onto bolt should assist in loosening the bolt while turning the bolt out with a wrench.
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