Block serial numbers - what are these?

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Aug 25, 2009 | 11:02 PM

kelp

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Block serial numbers - what are these?

Engine builders should know this. I got my LS2 block in today. What are these numbers? There are some original serial numbers on it, like this "72743" maybe a casting number?

and "7277143022", this looks like an original serial number.

But then there's this that looks machined in recently (Get a load of the upside down "5" on the left....

And this one, "X245-247". Anyone know what is with the dots?

Last edited by kelp; Aug 25, 2009 at 11:08 PM.

Aug 26, 2009 | 06:43 AM

rsz288

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Quote:

Originally Posted by kelp

Engine builders should know this. I got my LS2 block in today. What are these numbers? There are some original serial numbers on it, like this "72743" maybe a casting number?

and "7277143022", this looks like an original serial number.

But then there's this that looks machined in recently (Get a load of the upside down "5" on the left....

And this one, "X245-247". Anyone know what is with the dots?

Dont know what the last couple are but the last may be a quality check ID, but the first one is the casting year/day (the 3 may be the shift number), the second is the completed block serial number. 7 is the year, 277 the day of the year, last 6 digits a unique sequential number. Though oddly have seen a lot with "22" in them.