Scouter

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?

Scouter

Anyone?

JohnS Z28

iTrader: (1)

sounds like a 5.3 vortec truck engine?

Scouter

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?

91sonomast

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.

Scouter

Hmmm....since the tranny is connected and I don't plan to remove it, I guess Im not going to know. Engine is going in a 1998 Jeep Wrangler.