ID Engine

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Jan 25, 2012 | 11:45 PM

Scouter

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ID Engine

I'm new to LS engines and need help identifying what engine I bought. The back of the engine on the drivers side, just below the head, does not have a casting number. It has the pad where a casting number is typically shown but the pad is blank.

What I know about the engine.
It came out of a truck and has a 4x4 transmission hooked to it.
Aluminum block.
Head casting number is 243.
The wiring harness has a tag on it showing it was made 10/12/2006.

Any idea how to ID the engine?

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Jan 26, 2012 | 10:21 AM

Scouter

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Anyone?

Jan 26, 2012 | 10:32 AM

JohnS Z28

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From: Lansing, Michigan

sounds like a 5.3 vortec truck engine?

Jan 26, 2012 | 10:55 AM

Scouter

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That's what I think it is, but I want to know for sure. Is it normal not to have a casting number on the block?

Jan 26, 2012 | 12:06 PM

91sonomast

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From: Murray, KY

No it's not normal, and it doesn't have the engraving on the back that says, "4.8/5.3", "5.7", or "6.0"? Only other way would to be measure the bore and stroke.