LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

5/16" Head ARP bolts (12pt or 6pt)

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Old 02-02-2008, 05:58 PM
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5/16" Head ARP bolts (12pt or 6pt)

I see alot of people recommending the 12pt heads. I noticed they also sell a 6 point head (http://www.jegs.com/webapp/wcs/store...0002_133874_-1)

Won't the 6 point be alot easier to install since you can just use the open end of a 5/16 wrench? Why do people recommend the 12 point head over the 6 point?
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Old 02-02-2008, 06:41 PM
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Its easier to fit a socket on,and a wrench wont slip off it.
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Old 02-03-2008, 07:18 AM
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I run the 6 point without any issues, but they are studs.
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Old 02-03-2008, 07:58 AM
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Most people use a torque wrench/socket to install head bolts, not an open end wrench The only reason I see to go for the more costly twelve pont is that if the bolt heads are very close to the springs, it is easier to get a socket on them. Ususally this is not a problem with a typical LT1.

Rich
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Old 02-03-2008, 10:19 AM
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I believe he's referring to the ARP header bolts.
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Old 02-03-2008, 10:26 AM
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If you're working in a tight area, you wont need as much room to rotate the wrench to get a grip on a 12 point head.
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Old 02-03-2008, 10:37 AM
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Originally Posted by rskrause
Most people use a torque wrench/socket to install head bolts, not an open end wrench The only reason I see to go for the more costly twelve pont is that if the bolt heads are very close to the springs, it is easier to get a socket on them. Ususally this is not a problem with a typical LT1.

Rich
Originally Posted by BTC
I believe he's referring to the ARP header bolts.



I found some Breslin bolts online so I'm going to try and order those. If I don't get them I'll just go with some 12 point ARP's. Thanks guys.
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Old 02-03-2008, 10:45 AM
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Originally Posted by ssbowtie1



I found some Breslin bolts online so I'm going to try and order those. If I don't get them I'll just go with some 12 point ARP's. Thanks guys.
Oops, sorry. Well, I torque those anyway

Rich
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Old 02-03-2008, 11:00 AM
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Originally Posted by ssbowtie1



I found some Breslin bolts online so I'm going to try and order those. If I don't get them I'll just go with some 12 point ARP's. Thanks guys.
Don't bother with the stupid locking gimicks. Only reason header bolts "loosen" is the gasket compresses and causes them to lose torque. Retighten them frequently for the first week or two is all you need to do.
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Old 02-03-2008, 11:05 AM
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Originally Posted by 96capricemgr
Don't bother with the stupid locking gimicks. Only reason header bolts "loosen" is the gasket compresses and causes them to lose torque. Retighten them frequently for the first week or two is all you need to do.
Part of this is true. What people forget to do when installing headers, they don't chase the threads. All that rust from the old bolts stay in there. So, when you think you got them tight, they really are not. I use studs and the threads were chased. I have never had to retighten my headers.
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Old 02-03-2008, 11:46 AM
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Use "Never Seize" or the equivalent whenever you install headers.

Rich
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Old 02-03-2008, 11:46 AM
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If you search EBay, you can find a vendor with some stainless Breslins. The company is Boese Engineering, or something like that.
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Old 02-03-2008, 12:45 PM
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Originally Posted by jpack24
Part of this is true. What people forget to do when installing headers, they don't chase the threads. All that rust from the old bolts stay in there. So, when you think you got them tight, they really are not. I use studs and the threads were chased. I have never had to retighten my headers.
It also depends on the gasket used, something like the Earl's Pressure master does not need retorquing but a cheapy paper one likely will.
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