LS1 Engine

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Nov 27, 2006 | 08:11 PM

93BlackTA

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Joined: Sep 2006

Posts: 391

From: Newfoundland, Canada

LS1 Engine

Is there any way to tell what year car a LS1 engine came out of by any numbers on the block etc? Thanks.

Nov 28, 2006 | 07:03 AM

Capn Pete

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Joined: Jan 2002

Posts: 5,308

From: Oshawa - Home of the 5th-gen

This info came off of the MorTec webpage:

12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum
12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum
12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum
12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum

Not really year specific

Nov 28, 2006 | 07:38 AM

93BlackTA

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Registered User

Joined: Sep 2006

Posts: 391

From: Newfoundland, Canada

yes, i was on that site this morning and also came to that conclusion...I'm gonna have to get some numbers and see what i can come up with...maybe narrow it down a bit..Thanks

Nov 28, 2006 | 08:15 AM

AL SS590 M6

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Joined: Jul 1998

Posts: 6,247

From: Charlotte,MI USA

It's hard to do because sometimes towards the end of a model run GM would change over to the next years spec parts rather then running another batch of old parts.
Case in point my 00 Formy which I ordered in March of 00 has an LS6 style block (not a real LS6 block according to the part numbers) and 241 heads which weren't supposed to be on 00s, just 01 and up.