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

3/4 inch Header bolts work for install?

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Old Sep 19, 2007 | 11:11 PM
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Default 3/4 inch Header bolts work for install?

Im installing some mid-length headers this weekend and was wondering if 3/4 inch Bolts would work. thanks
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Old Sep 19, 2007 | 11:29 PM
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i think 1" is the norm.
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Old Sep 19, 2007 | 11:47 PM
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Well, will they work tho?
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Old Sep 20, 2007 | 12:56 AM
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They will work, but they will have more of a chance of loosening up, and you have more of a chance of stripping out the bolt holes since only they only have ~3/8" of the bolt actually in the threads instead of 5/8".
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Old Sep 20, 2007 | 03:00 AM
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I used the 1 inch bolts, if they were cast iron i would say tare your *** but like said above, might strip threads.
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Old Sep 20, 2007 | 10:09 PM
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I had 1 inch bolts when I installed my headers, and they bottomed out in the aluminum heads. I ended up cutting like an 1/8th inch from all of them.
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Old Sep 21, 2007 | 07:15 AM
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Originally Posted by tonskiguy
I had 1 inch bolts when I installed my headers, and they bottomed out in the aluminum heads. I ended up cutting like an 1/8th inch from all of them.
you wouldve been better off using a washer an lock washer
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Old Sep 21, 2007 | 06:35 PM
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Originally Posted by tonskiguy
I had 1 inch bolts when I installed my headers, and they bottomed out in the aluminum heads. I ended up cutting like an 1/8th inch from all of them.
Were they cheap 1/4" flange headers?

Have we met? We live very close, I drove through Geenville minutes ago.
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Old Sep 21, 2007 | 08:28 PM
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Originally Posted by 96capricemgr
Were they cheap 1/4" flange headers?

Have we met? We live very close, I drove through Geenville minutes ago.
As for the flange, I don't have the measurement handy, but they were FLP headers, Poor design with awful plug access and almost impossible to tighten the bolt by the #5 & 6 cylinder , no way to add another washer, no leaks though . The Heads are TPiS.
As for my local, see PM
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