Generation III Internal Engine 1997-2006 LS1 | LS6
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Help IDing piston

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Old Dec 2, 2020 | 07:50 PM
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Picked up a LQ4 from a local farmer that had it in his shed. Said it was his sons who got it from somebody else. Short story, where it came from is unknown. Gen 3 block, cross hatch visible and no cylinder ridge. Machine shop did not have to bore, just stone honed. Has gen 4 rods which peaked my interest, but I have not seen this particular piston before and hope someone might know. Tried running the numbers on the pistons, but got nothing. The skirt coating is barely worn and piston mics at 4.0002.




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Old Dec 2, 2020 | 09:35 PM
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Appears to just be an OEM piston.
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Old Dec 2, 2020 | 09:45 PM
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Good deal, thanks.
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Old Dec 2, 2020 | 10:04 PM
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Is the dish volume the same on both gens. Around 6.7 cc I think
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Old Dec 2, 2020 | 10:08 PM
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LQ4 is Gen III only.
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Old Dec 3, 2020 | 02:09 AM
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should be -8cc
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Old Dec 3, 2020 | 06:46 AM
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Ok thanks, I know LQ4 is gen 3, why I was surprised to find gen 4 rods and pistons on tear down.
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Old Dec 3, 2020 | 08:43 AM
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Originally Posted by rick539
Ok thanks, I know LQ4 is gen 3, why I was surprised to find gen 4 rods and pistons on tear down.
All engines transitioned to gen 4 rods/pistons starting in 04, even the gen 3 engines.
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