C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Will I encounter and broken bolts?

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Old Mar 3, 2008 | 08:04 PM
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Default Will I encounter and broken bolts?

I ordered a set of hedman elites and for my 85 vette. My dads been saying that i might run into broken bolts when i take the originals out. Is this true? Whats the worst that could happen?
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Old Mar 3, 2008 | 08:50 PM
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The worst thing that could happen is snapping 1 or more manifold bolts that are flush with the cylinder head. The fix would be to remove the head, drill out the broken bolt and extract the remnants.
A super bad day would be to drill the bolts out wrong, scrapping the head or requiring threaded inserts.
Except for that possibility, no big deal at all.
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Old Mar 3, 2008 | 08:53 PM
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All of mine came out without a hint of trouble. Think positive
Worst case would probably be drill and easy out, after the stock manifold is out of the way.
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Old Mar 3, 2008 | 08:54 PM
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Worst broken bolts will be the exhaust manifold to the Y pipe.
If you are replacing everything (going to long tubes) it won't matter because you won't be reusing the Y pipe.

If you snap the head off a manifold bolt you should be able to get a vice grip on it or jam two nuts together to get it off.
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Old Mar 6, 2008 | 11:08 PM
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i got these in today. I'm going to need help welding the collector to the pipe thought. If anyone in the houston area can help me out send me a pm. thanks
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Old Mar 11, 2008 | 10:33 PM
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I put one of the headers on and it sounds goooood! I'll have to wait till tomorrow to put on the other one. i had a question. will i have to take the o2 sensor off of the old manifold and put it on the pipe? or will i not need it?
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Old Mar 11, 2008 | 11:13 PM
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You will need the O2 sensor. If your headers don't have a bung, weld one into the collector adapter.
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Old Mar 12, 2008 | 12:32 AM
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Spray the bolts first and let them soak with WD-40 over night.

Once you get the bolt to budge the slightest amount, go back the other way [yes tighten it back up] spray more and then loosen. You may even have to tighten it before it breaks loose.....I know it sounds funny, but tightening just a hair and then going loose may be jsut what you need to keep from breaking it.

If at any time it starts to get harder to turn.....stop.....go back tight and respray.....then loosen again.

Growing up Poor in East Texas had me pulling junk out of the woods all the time for re-use. I learned to deal with rusty stuck threads at an early age.
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Old Mar 12, 2008 | 03:25 AM
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PB Blaster works better that WD-40. Use anti seize on reassembly.

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Old Mar 12, 2008 | 07:48 AM
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Originally Posted by jhammons01
Spray the bolts first and let them soak with WD-40 over night.

Once you get the bolt to budge the slightest amount, go back the other way [yes tighten it back up] spray more and then loosen. You may even have to tighten it before it breaks loose.....I know it sounds funny, but tightening just a hair and then going loose may be jsut what you need to keep from breaking it.

If at any time it starts to get harder to turn.....stop.....go back tight and respray.....then loosen again.

Growing up Poor in East Texas had me pulling junk out of the woods all the time for re-use. I learned to deal with rusty stuck threads at an early age.
Thats good info. thanks
all of the bolts on one side came off with no problem. Lets hope its the same for the other.
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Old Mar 12, 2008 | 08:29 AM
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Originally Posted by 86PACER
PB Blaster works better that WD-40. Use anti seize on reassembly.

Good stuff and good luck!
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Old Mar 12, 2008 | 10:46 AM
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I used PB blaster and they all came out easily
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