lq9 or ls2

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Originally Posted by mean05

no they both have 317's

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the 1999-2000 lq4 had a dif casting number. They werent 317 heads or aluminum. Werent they cast iron??

some of the LQ4s had cast iron heads and longer crank snouts that allowed the use of the old style flywheel, flexplate and transmissions.

pistons and pushrods are diff. on the LQ motors. if they are 01+ then thats the only diff. 00 down would be iron headed... LQ9 comes out of escalades, denali's and ss's only...

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Originally Posted by SCIV

Thought the LQ9 rods were different than the LQ4? Different material?

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The LQ9's have beefier rods in the earlier versions; later model LQ4's got the same rods as the LQ9. In the newer versions only the pistons are different.

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Originally Posted by DBYRD

pistons and pushrods are diff.

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I know you meant pistons and connecting rods ;)