engine indentification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Larry1 · 09-08-2010, 09:45 AM

I am trying to figure out what my engine is with no luck,any help would be appreciated.It is sbc,rear of the engine says 57lg with 56t underneath also i163 number there to.and front of the block vko75971 Thanks

gkesseru · 09-08-2010, 10:11 AM

Look for a large casting number on the block behind the driver side head. This is the casting number for type of block. The two or three letters and number on the block flat right in front of the passenger head is the vehicle type and part of the VIN. Then look here
http://www.73-87.com/chevy_ids/sbcid2.htm

Larry1 · 09-08-2010, 10:57 AM

thats the only #s i could find,i will look again.Could it be gm goodmark engine maybe thats wye only #found.

gkesseru · 09-08-2010, 01:04 PM

If it's a GM Block, then there will always be a casting number on the back of the block driver side. The two/three letter suffix on the front may be missing if it's a crate engine or if the block has been shaved.
Here's where to look
http://www.chevyasylum.com/tech/decode.html

09-08-2010, 09:45 AM	#1
Larry1 Registered User Join Date: May 2006 Location: Canada Posts: 50	engine indentification I am trying to figure out what my engine is with no luck,any help would be appreciated.It is sbc,rear of the engine says 57lg with 56t underneath also i163 number there to.and front of the block vko75971 Thanks

09-08-2010, 10:11 AM	#2
gkesseru Registered User Join Date: Dec 2009 Location: California, Maryland Posts: 544	Re: engine indentification Look for a large casting number on the block behind the driver side head. This is the casting number for type of block. The two or three letters and number on the block flat right in front of the passenger head is the vehicle type and part of the VIN. Then look here http://www.73-87.com/chevy_ids/sbcid2.htm __________________ 72 Fleet (died) 78 Step (sold) 55 Step named Fred (sold) 00 F150 68 Step (named El Scorcho by PO) Build thread for the new El Scorcho http://67-72chevytrucks.com/vboard/s...d.php?t=392932 Last edited by gkesseru; 09-08-2010 at 10:13 AM.

09-08-2010, 10:57 AM	#3
Larry1 Registered User Join Date: May 2006 Location: Canada Posts: 50	Re: engine indentification thats the only #s i could find,i will look again.Could it be gm goodmark engine maybe thats wye only #found.

09-08-2010, 01:04 PM	#4
gkesseru Registered User Join Date: Dec 2009 Location: California, Maryland Posts: 544	Re: engine indentification If it's a GM Block, then there will always be a casting number on the back of the block driver side. The two/three letter suffix on the front may be missing if it's a crate engine or if the block has been shaved. Here's where to look http://www.chevyasylum.com/tech/decode.html __________________ 72 Fleet (died) 78 Step (sold) 55 Step named Fred (sold) 00 F150 68 Step (named El Scorcho by PO) Build thread for the new El Scorcho http://67-72chevytrucks.com/vboard/s...d.php?t=392932

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