ID my block?
ID my block? I posted this on internal, but I think it's better suited here, c&p.
Just trying to gather as many specs as I can about this motor I purchased and was looking for some help.
Google hasn't really solidified my questioning.
Block Number: 12559378
Heads are 241
Intake: 12561184 (I understand this is the LS6 intake off an FBody)
I mainly curious about the year. Apparently there's enough of a different between the years to require separations for certain parts.
Thanks guys.
Just trying to gather as many specs as I can about this motor I purchased and was looking for some help.
Google hasn't really solidified my questioning.
Block Number: 12559378
Heads are 241
Intake: 12561184 (I understand this is the LS6 intake off an FBody)
I mainly curious about the year. Apparently there's enough of a different between the years to require separations for certain parts.
Thanks guys.
i have also been looking to see if my block is 04 or and older one for head studs and i cant find any answers at all. I may call the dealership to see if they would have any idea, just and idea.
12561168 denotes a LS6 block, so its a LS1 block for sure. What year isn't really possible to tell for sure, but its a 00-02. http://chevythunder.com/LS1%20components.htm
Since it has the F-body LS6 intake, its not a 00 mostlikely. Its a 01-02 LS1 block unless someone changed the intake, which in that case it could very well be a 00. Regardless, there are no differences to worry about. Everything interchanges.
Since it has the F-body LS6 intake, its not a 00 mostlikely. Its a 01-02 LS1 block unless someone changed the intake, which in that case it could very well be a 00. Regardless, there are no differences to worry about. Everything interchanges.
Last edited by squee; Jan 28, 2010 at 01:29 AM.
The head studs are not determined by the block. They go by which heads you are using. Their are only 2 diff head studs, as far as I know for an LS engine. Early engines prior to 04, Use a longer stud. After 04 they use a shorter stud. You can get the early stud in a 6 point or 12 point, But the later stud I believe only comes in 12 point.
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Not true. If you look at the numbers you can determine what years it could be, thus narrowing it down. If its not a LS6 block, than its a 02 or before thus no need to order the shorter studs.
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The head studs are not determined by the block. They go by which heads you are using. Their are only 2 diff head studs, as far as I know for an LS engine. Early engines prior to 04, Use a longer stud. After 04 they use a shorter stud. You can get the early stud in a 6 point or 12 point, But the later stud I believe only comes in 12 point.
The early engines used a combination of long and short bolts and the 04+ use all short bolts.
To the original poster, I believe you have an older block and you would need the pre-04 head bolts or studs. If you have any questions feel free to shoot me a message or give me a call.
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
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12561168 denotes a LS6 block, so its a LS1 block for sure. What year isn't really possible to tell for sure, but its a 00-02. http://chevythunder.com/LS1%20components.htm
Since it has the F-body LS6 intake, its not a 00 mostlikely. Its a 01-02 LS1 block unless someone changed the intake, which in that case it could very well be a 00. Regardless, there are no differences to worry about. Everything interchanges.
Since it has the F-body LS6 intake, its not a 00 mostlikely. Its a 01-02 LS1 block unless someone changed the intake, which in that case it could very well be a 00. Regardless, there are no differences to worry about. Everything interchanges.
