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2002 Camaro ls1 vs ls6 block

This is a discussion on 2002 Camaro ls1 vs ls6 block within the General Help forums, part of the LSx Technical Help Section category; So apparently a few 2002 camaro's got the ls6 block instead of the ls1 block due to GM surplus... Obviously ...

  1. #1
    Junior Member 64MonGooSe64's Avatar
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    2002 Z28 Camaro

    2002 Camaro ls1 vs ls6 block

    So apparently a few 2002 camaro's got the ls6 block instead of the ls1 block due to GM surplus... Obviously there is no real difference in sizes between the blocks other than the bottom end.. i guess the ls6 came with better crank ventalation and is a little stonger under high RPM's.

    Im just wondering if anyone knows how to tell the difference between the two blocks without literally taking appart the bottom end. does anyone know the ls1 / ls6 block casting numbers and are there any of the obvious signs that its would be an ls6 block.

    ive heard that the ls6 block is slightly darker block when viewed, wether this is true or not im not quite sure.

    any help would be great

  2. #2
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    Supposedly 10-15% of the '01 and 25% of the '02 cars got the LS6 block. Get an inspection mirror and flashlight and look for casting number 12561168 for the LS6 on the drivers side deck above the trans flange. You can also look for a "bullseye" stamped near the thermostat, the LS1 has it - LS6 doesn't.

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    Dealing Powder ntimid8r7's Avatar
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    1994 Z28 MQBM
    2001 SS #1629 LPM

    yeah thats the only way to tell is by the casting number. unfortunately they have no power gains over the LS1 as far as the fbody goes.

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    Senior Member SS02's Avatar
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    Still... better then not!

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    '01SS Camaro,'09 Z06

    SpurSS has the LS6 block in her and it is one of the fastest rev'ing motors I have ever driven the venting above the mains may really help
    Last edited by SpurSS; 02-08-2009 at 11:53 AM. Reason: spelling

  6. #6
    I don't sell out! blackSS01's Avatar
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    When ripping apart my upper end for my H/C combo going in, I found that I have a LS6 block . If you do a search you can find some good info
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    Member side2000's Avatar
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    Quote Originally Posted by blackSS01 View Post
    When ripping apart my upper end for my H/C combo going in, I found that I have a LS6 block . If you do a search you can find some good info
    that's a nice find. wish it always worked out that way.

    the vents definately are an advantage.

  8. #8
    I flame retards CamaroFan71's Avatar
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    Quote Originally Posted by 2001NBMZ28 View Post
    Supposedly 10-15% of the '01 and 25% of the '02 cars got the LS6 block. Get an inspection mirror and flashlight and look for casting number 12561168 for the LS6 on the drivers side deck above the trans flange. You can also look for a "bullseye" stamped near the thermostat, the LS1 has it - LS6 doesn't.
    I didnt notice a "bullseye" when looking at mine. What does it look like exactly?

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    Ls1 ls6 in 01 02 camaro

    So some came with LS6, will that be refecleted on the Service Parts Identification tag on the car? instead of LS1 will it show LS6?

  10. #10
    Member side2000's Avatar
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    no because all the main components that make an ls1 an ls1 is still used. i. e. the heads/cam

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