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Determining ls6 block year for head studs

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Old Jan 23, 2010 | 07:22 PM
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Default Determining ls6 block year for head studs
Ok guy i have searched and can not find an answer to my question about my block.

I was told it was an 04 z06 ls6 block, and it is an ls6 but how can i find out what year it is. I am about to swap my heads for some AFR 225's and need to get some arp head studs but dont no if i need the pre 04 or the 04 and up head studs.

Does anyone know how i could find this out from a casting number or something?
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Old Jan 24, 2010 | 02:11 AM
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bump for the morning crew
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Old Jan 24, 2010 | 10:12 PM
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bump for the night crew does anyone have and idea?
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Old Jan 25, 2010 | 02:15 AM
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stick something down in the holes. if the two in the middle row on the ends are shallower than the ones inboard of thoes, then you have an 03 block, if they are the same depth, you have an 04 block.
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Old Jan 25, 2010 | 07:37 AM
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Good answer! I mean, who would know this?
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Old Jan 25, 2010 | 09:26 AM
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If you have an 02+ LS6 block, you'll be using the short studs.
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Old Jan 25, 2010 | 11:48 AM
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you mean the long ones? i know it holds true on the ls1's that the 04 + blocks had long bolts all the way around i beleive it was 04. the earlier blocks like my 98 have 2 short bolts.
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Old Jan 25, 2010 | 03:21 PM
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Originally Posted by bww3588
stick something down in the holes. if the two in the middle row on the ends are shallower than the ones inboard of thoes, then you have an 03 block, if they are the same depth, you have an 04 block.
yes i do know this but its my Daily Driver so i am trying to get everything ordered so i can do all of this in a weekend. Thats why i need to know for sure.

As for the 02+ ls6 blocks are you saying the back to are shorter or they are the same size? which would mean i need the 04 and up studs?

Thanks guys keep the info coming please
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Old Jan 25, 2010 | 05:12 PM
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Originally Posted by bww3588
you mean the long ones? i know it holds true on the ls1's that the 04 + blocks had long bolts all the way around i beleive it was 04. the earlier blocks like my 98 have 2 short bolts.
Negative. 04 blocks used short studs.
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Old Jan 25, 2010 | 05:30 PM
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Originally Posted by Damian
Negative. 04 blocks used short studs.
Are you sure of this because when you go to order you can order pre 04, or 04 and up.

the pre 04 has the two shorther ones in the back, and the 04 and up kit has all the same size.
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Old Jan 26, 2010 | 05:30 PM
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bump for some more info
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Old Jan 28, 2010 | 02:57 AM
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bump ttt
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Old Jan 28, 2010 | 03:03 AM
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ok nvm mine i just found the website that shows there is no way to tell hold on and i will post it up
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Old Jan 28, 2010 | 03:04 AM
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http://chevythunder.com/LS1%20components.htm there is the website is shows the same number and there would be no way to tell
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Old Jan 28, 2010 | 03:04 AM
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mods you can delete this thread if you need to
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Old Jan 28, 2010 | 04:52 AM
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Originally Posted by uphigh07
http://chevythunder.com/LS1%20components.htm there is the website is shows the same number and there would be no way to tell
Nice find!
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