Ls1 Or Ls6 Block ?

[JEFFTATE]

I have a friend that has a 2002 Z28 . How can we tell if it has the LS1 or LS6 block ? There is another guy interested in buying the car ,but only if it uses the LS6 block .

[camcojb]

wouldn't be an LS6 unless the engine was swapped.

Jody

[Nine Ball]

actually, some of the later '01 and most of the '02 F-bodies came from the factory with LS6 engine blocks. The internals aren't LS6 though, just the blocks. You would have to crawl under the car and verify the part #s on the block, which I don't have.

Performance wise, it means nothing. In fact, several engine builders prefer using an LS1 block since they seem a little stronger in certain areas.

[camcojb]

actually, some of the later '01 and most of the '02 F-bodies came from the factory with LS6 engine blocks. The internals aren't LS6 though, just the blocks. You would have to crawl under the car and verify the part #s on the block, which I don't have.

Performance wise, it means nothing. In fact, several engine builders prefer using an LS1 block since they seem a little stronger in certain areas.

Thanks Tony, had no idea.

Jody

[alky]

Got this from LS1tech.com

About 10-15% of 2001 F-bodys and about 25% 2002 f-bodys got the LS6 block with standard LS1 internals.

Look on the driver side of the car, on the rear of the engin block pad. LS6 12561168


The LS1 12559378

[JEFFTATE]

Thanks alky. I've got the LS1/LS6 book , but I haven't had time to look through it yet.

[JEFFTATE]

Looked in the LS1/LS6 book.
Casting # for 2002 LS1 is 12559378.
Casting # for 2002 LS6 is 12561168.

[gEtyOpAPiOn]

if the block has that dull powdery look then it has a bottom ls6 block but will still come with the ls1 241 heads

i think if its missing the bullseye on the machined part of the front passanger head side it will indicate an ls6 block