How do I verify engine numbers ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blue4x4 · 04-15-2011, 10:17 AM

I have 2 engines that came with my 47 EC102. Is there anyway to match it to the vehicle. Where would the birth certificate be if it came with one ?

MrTucker · 04-15-2011, 03:17 PM

For my '53 the only way to match the two is with the title. Before they had VIN's they would put a serial number and an engine number on the title

dwcsr · 04-15-2011, 06:44 PM

My understanding with GMC numbers is that they were not really year specific. The were more series specific. You can take the block casting number and see if its in the year range of your title and then look at the serial number (vin) for the truck and see it it was produced in the same year range as the motor. GMC serial numbers should tell you what motor, trans and tonnage the last 6 numbers should be the production number. Certain production numbers were run in certain years.

Blue4x4 · 04-16-2011, 01:13 AM

Thanks for your help everyone.

mr48chev · 04-17-2011, 09:55 PM

They have put together some pretty decent info here http://www.oldgmctrucks.com/index.html I've poked around on it before when I was trying to figure a GMC out.

There is some info here http://home.znet.com/c1937/Cast.htm You have to hunt though the list though.

04-15-2011, 10:17 AM	#1
Blue4x4 Senior Member Join Date: Mar 2003 Location: Sparks, NV Posts: 790	How do I verify engine numbers ? I have 2 engines that came with my 47 EC102. Is there anyway to match it to the vehicle. Where would the birth certificate be if it came with one ?

04-15-2011, 03:17 PM	#2
MrTucker Registered User Join Date: Apr 2008 Location: Denver, CO Posts: 455	Re: How do I verify engine numbers ? For my '53 the only way to match the two is with the title. Before they had VIN's they would put a serial number and an engine number on the title __________________ 1953 GMC 1/2 ton long bed Original 228 I6 with a Hydramatic Auto Tranny Project Pack Rat - http://67-72chevytrucks.com/vboard/s....php?p=3374649

04-15-2011, 06:44 PM	#3
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: How do I verify engine numbers ? My understanding with GMC numbers is that they were not really year specific. The were more series specific. You can take the block casting number and see if its in the year range of your title and then look at the serial number (vin) for the truck and see it it was produced in the same year range as the motor. GMC serial numbers should tell you what motor, trans and tonnage the last 6 numbers should be the production number. Certain production numbers were run in certain years.

04-16-2011, 01:13 AM	#4
Blue4x4 Senior Member Join Date: Mar 2003 Location: Sparks, NV Posts: 790	Re: How do I verify engine numbers ? Thanks for your help everyone.

04-17-2011, 09:55 PM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,406	Re: How do I verify engine numbers ? They have put together some pretty decent info here http://www.oldgmctrucks.com/index.html I've poked around on it before when I was trying to figure a GMC out. There is some info here http://home.znet.com/c1937/Cast.htm You have to hunt though the list though. Last edited by mr48chev; 04-17-2011 at 10:05 PM.



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