Two sets of numbers on old engine block... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jblaven · 09-14-2011, 04:16 PM

You know, stamped right in front of cylinder number 2 on that angled surface. On my new block, I have just one number there. On my old block (from Flint Michigan factory as per the top number), there is also a 2nd number stamped just below it and sort of overlapping the bottom of the top number. Any ideas of what this is or why it is there?

I though it might be when someone does a rebuild or something. Anyway, i found it odd.
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BigBlocksRule · 09-14-2011, 05:59 PM

Second number - generally smaller in size - is a partial VIN of the vehicle. First part tells what the engine was destined for.

09-14-2011, 04:16 PM	#1
jblaven Registered User Join Date: Jul 2011 Location: Georgia Posts: 69	Two sets of numbers on old engine block... You know, stamped right in front of cylinder number 2 on that angled surface. On my new block, I have just one number there. On my old block (from Flint Michigan factory as per the top number), there is also a 2nd number stamped just below it and sort of overlapping the bottom of the top number. Any ideas of what this is or why it is there? I though it might be when someone does a rebuild or something. Anyway, i found it odd. Posted via Mobile Device

09-14-2011, 05:59 PM	#2
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Two sets of numbers on old engine block... Second number - generally smaller in size - is a partial VIN of the vehicle. First part tells what the engine was destined for.

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