LS1 ARP head studs

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Aug 23, 2009 | 03:28 AM

Turbov8

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LS1 ARP head studs

Hi all

I have an ls1 that i am building with a set of Dart Pro heads.The block is a brand new crate block. I am having problems with a set of head studs i got as they were the wrong ones.
What's wrong is that the threads in the block are different lengths from the top ones to the bottem ones.

Can someone please help me with getting the right length studs?

Thanks, Daniel

Aug 23, 2009 | 03:35 AM

jetlag

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From: Southaven, MS (near Memphis, TN)

I'm not sure if this affects you or not... but I'll be buying ARP head bolts for my car soon, and noticed that there is a different part number for 2004+ blocks.

So maybe you have the wrong part number?

Aug 23, 2009 | 03:42 AM

Turbov8

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Well i heard that there is 3 different head studs for LS1,s

Aug 23, 2009 | 08:34 AM

vettenuts

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From: Little Rhody

There are at least two that I am aware of, and one has all the same length. What is the number on your kit? If you have a new crate block, it is likely the later design.

Aug 23, 2009 | 03:18 PM

quick346

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From: Grand haven ,MI

the older have the 2 shorter bolts on the very front and back top holes. the 2004 and newer are all the same lenght and are shorter than the longest one of the old stlye

Aug 23, 2009 | 04:13 PM

CroonerSS

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Quote:

Originally Posted by quick346

the older have the 2 shorter bolts on the very front and back top holes. the 2004 and newer are all the same lenght and are shorter than the longest one of the old stlye

Also, there is stamp on the front of the block that gives the date. Look right on top of where the passenger cylinder head goes at the front of the block.

Mine says E274 which means May 27 2004 so I have the new style that uses all the same bolts.