LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Broke header bolt off in Head on Cylinder 7...help

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Old 08-12-2007 | 12:12 AM
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Default Broke header bolt off in Head on Cylinder 7...help

well guys I was trying to remove my stock manifolds to put on some headers, first 4 bolts came off easily, skipped one, and the one holding in # 7 snapped, what are my options. The bolt is pertruding out of head should i apply heat or drill it out??
any advise is apperciated
Old 08-12-2007 | 12:19 AM
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hm...well my experiance tells me ( i;ve broken quite a few bolts off ). drillin can be usfull. But can you move the thing with some vise grips? if not try using the ol screw drive n hammer, use the driver like a chisle and see if the bolt spins. a lot of times the stub part isnt in very tight, you're lucky there is some protrusion.
Old 08-12-2007 | 12:36 AM
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spray it down with pb blaster, then try turning it with vise grips. Drilling should be one of your last options. If you could get a nut to set on the bolt, get someone to tack weld it and turn the nut with a wrench. There are several ways to try if the bolt is sticking out of the head. Good luck.
Old 08-12-2007 | 12:45 AM
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been there bro ^^^^^^the best answer for your situation.
soak it over night with good oil,then with visegrips tighten and loosen back and forth going further each time slowly.
Old 08-12-2007 | 12:46 AM
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i have 2 of them in my driver side head. they are about level with the head so i left them in when doing the headers since they arent utilized.

i was gonna EZ out them. if you can get your hands on a set.
Old 08-12-2007 | 12:59 AM
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same thing happened to me. i used an EZ out worked great. id try the pb blaster and vise grips first though.
Old 08-12-2007 | 01:01 AM
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Thanks for the ideas so far guys, i like the bolt-tack weld idea. I was wondering what if i just installed the header, and used that threaded stud (that used to be a bolt) as a stud and then just put a bolt on it? good idea horrendous idea... let me know thanks for the efforts guys
Old 08-12-2007 | 02:17 AM
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Originally Posted by phirepower
Thanks for the ideas so far guys, i like the bolt-tack weld idea. I was wondering what if i just installed the header, and used that threaded stud (that used to be a bolt) as a stud and then just put a bolt on it? good idea horrendous idea... let me know thanks for the efforts guys
Fix it before you put the header on. How much of the bolt is sticking out?
Old 08-12-2007 | 02:19 AM
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if its the bolt on the verry end you can just leave it like i did.
Old 08-12-2007 | 04:02 AM
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Which #7 bolt you break? Like said above if it's the last bolt then you won't have to worry about it because headers don't use the hole. If you haven't done the other side yet spray some liquid wrench on them first.
Old 08-12-2007 | 05:31 AM
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yea it was so far in the heads mightve had to come off.
Old 08-12-2007 | 03:58 PM
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do your best to get it out but if it doesn't don't sweat it too much.

I broke the same bolt the same way, what I did was bought the percy seal-4-good header gaskets and stage 8 locking header bolts. And I used high temp rtv sealent in the head gasket when I put it on. It held up for about 6 months and tha includes racing the car during that time spand and driving it everyday. Personally I think it was probably just becaused I didn't tighten the header bolts enough.



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