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Generation III Internal Engine 1997-2006 LS1 | LS6
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01/02 ls6 block or not

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Old 04-27-2006, 08:35 PM
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Default 01/02 ls6 block or not
How can u tell if your car had the ls6 block or the other one for that year since there was only a few made.
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Old 04-27-2006, 08:42 PM
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Casting number on the block pad at the back of the drivers side, numbers are 12561168 for the LS6.
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Old 04-27-2006, 08:48 PM
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how much better is this block compared to the other.
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Old 04-28-2006, 01:59 PM
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Originally Posted by philly3384
how much better is this block compared to the other.
Enough to make looking for one worth your time and effort. The casting had a few design improvements over the LS1 casting...most notably, oiling passages, and the cast-in bay-to-bay "windows" in the bottom end.
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Old 04-28-2006, 03:59 PM
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they also were more quite than ls1 blocks (that ticking and piston slap noise when cold)
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oil in my FAST 90 w/ a AMW catch can




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