LS5 block questions

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  • tom444634

    #1

    LS5 block questions

    This picture shows a number stamped in the block where the oil pan gasket goes. The right side has all 7's stamped at each cylinder, while the right side has three 9's and one 8. The eight appears to be double stamped. What meaning did these stampings have..if any?




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  • Clem Z.
    Expired
    • January 1, 2006
    • 9427

    #2
    that was to help the piston installer to fit

    the correct size piston. this way they could match the high/low end of the piston tolerance to the coreect size cylinder bore.

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