From what are this ARP head studs?

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Jan 14, 2010 | 05:35 PM

El_TransAm98

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From what are this ARP head studs?

I bought this from a friend and I wanna know if this will fit to my ls1 motor I try a search but never found out if u can tell me plz from what motor are this can be used!!

Jan 15, 2010 | 07:38 AM

KCS

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From: Conroe, TX

Looks like a head stud kit for an older LSx (<'04), but can't be sure. There should be a different number on the box, like 234-4110.

Jan 15, 2010 | 07:53 AM

G Engines

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From: greensboro, nc

Thats for the early ls blocks they use the long studs the newer blocks all the studs 7/16 studs are the same length

Jan 15, 2010 | 08:32 AM

KCS

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From: Conroe, TX

Quote:

Originally Posted by G Engines

Thats for the early ls blocks they use the long studs the newer blocks all the studs 7/16 studs are the same length

You mean 11mm?

Jan 15, 2010 | 09:20 AM

El_TransAm98

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But will this fit my ls1 I just bought them without the box... I just wanna know cuz I want to sell them have no need for them and wanna find out what fits so I would know to sell them!!!

Jan 15, 2010 | 09:42 AM

KCS

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From: Conroe, TX

Quote:

Originally Posted by El_TransAm98

But will this fit my ls1 I just bought them without the box... I just wanna know cuz I want to sell them have no need for them and wanna find out what fits so I would know to sell them!!!

No one here can tell you for sure, at least not with the limited info that you have. You need to measure the studs, thread pitch/spacing, and compare that to what an LS1 kit would be. From the picture you posted, it looks like an LS1 head stud kit, but we can't be certain until the important measurements are established.

I'm pretty sure they should be an M11 (~.433") diameter with a 2.0 thread spacing, and the small ones should be M8 (~.315") with a 1.25 thread spacing.

Jan 15, 2010 | 02:12 PM

El_TransAm98

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I got a paper that says 7/16 and withstand 200,000psi

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Jan 15, 2010 | 02:35 PM

El_TransAm98

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I got everything but didn't post all the things

Jan 15, 2010 | 04:36 PM

#10

KCS

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From: Conroe, TX

Quote:

Originally Posted by El_TransAm98

I got a paper that says 7/16 and withstand 200,000psi

What paper?

All Gen III/IV engines are metric, not standard thread. A 7/16" stud/bolt probably wouldn't even thread into the head bolt holes.

Jan 15, 2010 | 05:02 PM

#11

vettenuts

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From: Little Rhody

I thought the upper half of the stud was SAE, not metric.

Jan 15, 2010 | 05:06 PM

#12

XtraCajunSS

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From: Baton Rouge, LA, USA

That is a pre 2004 LS head stud kit. If it came with 6pt nuts, it is a 234-4110, if 12pt nuts then it is a 234-4316.

Shane

Jan 15, 2010 | 07:02 PM

#13

El_TransAm98

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Yeah thanks the nuts are 12 points

Jan 15, 2010 | 07:03 PM

#14

KCS

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From: Conroe, TX

Quote:

Originally Posted by vettenuts

I thought the upper half of the stud was SAE, not metric.

It could be, I don't know for sure. It doesn't really matter, as long as the portion that threads into the block is correct, and that's the portion I'm talking about. The threads in the block are metric, so the threads on the stud need to be metric as well. I've made the mistake of using an SAE bolt in a metric threaded hole, and it required a helicoil to fix.

Jan 16, 2010 | 07:40 AM

#15

vettenuts

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From: Little Rhody

Quote:

Originally Posted by KCS

I honestly never checked the thread but it would make sense that the upper threads are SAE. Also, I used an SAE 12 pt socket, 1/2" if I remember correctly but its been a while.

Jan 16, 2010 | 10:31 AM

#16

KCS

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From: Conroe, TX

Quote:

Originally Posted by vettenuts

I honestly never checked the thread but it would make sense that the upper threads are SAE. Also, I used an SAE 12 pt socket, 1/2" if I remember correctly but its been a while.

It very well could be, I've never measured either. It sure is a hell of a lot easier finding SAE threaded fasteners. When I made my own "Tim's Tool" to swap valvesprings, the closest place here in Houston that sold metric threaded rod was nearly 30 miles away.