What is this motor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Daddy Brim** · 04-30-2011, 09:28 PM

I need help identifying this motor, I was told it is a 350 the stamp on the front of the block is VL147695 and on the back of the block it looks like this.
5.7 L G
GM
SGI
I have looked on every chart I can find with no luck, THANKS.

OhOneWS6 · 04-30-2011, 09:31 PM

Sounds like a late 80's early 90's 350 to me. Pre LT1 post carb.

EDIT: Looks like someone knows those numbers.
http://wiki.answers.com/Q/Is_this_a_...G_SGI_14093638

**Daddy Brim** · 05-01-2011, 10:39 AM

more info please

OhOneWS6 · 05-01-2011, 11:08 AM

What info are you looking for? It's a late 80's early 90's 350 Small Block Chevrolet.

**Daddy Brim** · 05-01-2011, 11:13 AM

I was hoping to find out what it came out of, and what kind of HP. it is suppose to put out. OR was it a crate motor ?

OhOneWS6 · 05-06-2011, 07:11 PM

I got nothing. The only thing I find is that is was (Like most late 80's stuff) not real desirable for a performance build.

GASoline71 · 05-06-2011, 07:20 PM

The stamp on the pad on the block that is located in front of the passenger side cylinder head should end with 3 letters. That is the Engine Suffix Code. It'll tell you exactly what it is.

Gary

BIGKEV · 05-06-2011, 07:24 PM

http://classic-web.archive.org/web/2...ww.mortec.com/

What is the casting # on the back of the block?

stsalvage · 05-06-2011, 09:38 PM

I feel any of the blocks that are stamped 5.7 are the weaker blocks if you find a 3970010 block that is at 40-60 over best off is to resleave it at one time most people told me there are over 20 million 350 blocks out there from 1968--86 Now the MR Goodwerch has a good

deal out and there costing on the block is the 3970010 350 block 4 bolt main 290 hp for 1600.00long block brand new Not sure on the casting but i hear now days guys are Resleeving the old 350 blocks

BIGKEV · 05-07-2011, 02:41 AM

Quote:

Originally Posted by stsalvage

I feel any of the blocks that are stamped 5.7 are the weaker blocks if you find a 3970010 block that is at 40-60 over best off is to resleave it at one time most people told me there are over 20 million 350 blocks out there from 1968--86 Now the MR Goodwerch has a good

deal out and there costing on the block is the 3970010 350 block 4 bolt main 290 hp for 1600.00long block brand new Not sure on the casting but i hear now days guys are Resleeving the old 350 blocks

010 blocks are great blocks, and can go .080 over without issue. I can't tell you how many 010's I've built at .060 for roundy round cars with great success.

sean1969c10 · 05-07-2011, 06:49 AM

I see no reason to be afraid of a 1 pc rear main seal block for a street or street and strip application. They have a lot of thing going for them : better gasket sealing surfaces, many have factory roller cam, 1 pc rear main seal, and just better machine work from GM. If you start making more than 500hp you really need to start thinking about an aftermarket block, just to protect your investment in parts. I can't imagine sleeving 8 holes in a block unless it was numbers matching for something very valuable. At the shop where I work we charge 175.00 per hole to sleeve a cylnder. It is a lot of work to do it right, I have seen many blocks that were sleeved where the sleeve moved causing the engine to have head gasket problems or consume oil and ultimately have to have the block replaced. I have seen some blocks go .080, I wouldn't want it. I have also have had a 3970010 block bored .060 in my Nova window a cylnder at 6500 rpm. I found chunks of cylnder that were under .050 thick. My advise is to have a block sonic checked before going .060. Just my .02c

04-30-2011, 09:28 PM	#1
Daddy Brim Senior Member Join Date: Feb 2011 Location: Clovis Ca. Posts: 632	What is this motor I need help identifying this motor, I was told it is a 350 the stamp on the front of the block is VL147695 and on the back of the block it looks like this. 5.7 L G GM SGI I have looked on every chart I can find with no luck, THANKS.

04-30-2011, 09:31 PM	#2
OhOneWS6 Registered User Join Date: Dec 2009 Location: DFW, TX Posts: 764	Re: What is this motor Sounds like a late 80's early 90's 350 to me. Pre LT1 post carb. EDIT: Looks like someone knows those numbers. http://wiki.answers.com/Q/Is_this_a_...G_SGI_14093638 __________________ 72 Cheyenne Super 1/2 LWB White/Dark Yellow 07 Avalanche 2LT 74 Sleek Craft Rebel Jet Boat W/Pontiac 400 Last edited by OhOneWS6; 04-30-2011 at 09:33 PM.

05-01-2011, 10:39 AM	#3
Daddy Brim Senior Member Join Date: Feb 2011 Location: Clovis Ca. Posts: 632	Re: What is this motor more info please

05-01-2011, 11:08 AM	#4
OhOneWS6 Registered User Join Date: Dec 2009 Location: DFW, TX Posts: 764	Re: What is this motor What info are you looking for? It's a late 80's early 90's 350 Small Block Chevrolet. __________________ 72 Cheyenne Super 1/2 LWB White/Dark Yellow 07 Avalanche 2LT 74 Sleek Craft Rebel Jet Boat W/Pontiac 400

05-01-2011, 11:13 AM	#5
Daddy Brim Senior Member Join Date: Feb 2011 Location: Clovis Ca. Posts: 632	Re: What is this motor I was hoping to find out what it came out of, and what kind of HP. it is suppose to put out. OR was it a crate motor ?

05-06-2011, 07:11 PM	#6
OhOneWS6 Registered User Join Date: Dec 2009 Location: DFW, TX Posts: 764	Re: What is this motor I got nothing. The only thing I find is that is was (Like most late 80's stuff) not real desirable for a performance build. __________________ 72 Cheyenne Super 1/2 LWB White/Dark Yellow 07 Avalanche 2LT 74 Sleek Craft Rebel Jet Boat W/Pontiac 400

05-06-2011, 07:24 PM	#8
BIGKEV Registered User Join Date: Jan 2011 Location: Prescott AZ Posts: 112	Re: What is this motor http://classic-web.archive.org/web/2...ww.mortec.com/ What is the casting # on the back of the block? Last edited by BIGKEV; 05-06-2011 at 07:30 PM.

05-06-2011, 09:38 PM	#9
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: What is this motor I feel any of the blocks that are stamped 5.7 are the weaker blocks if you find a 3970010 block that is at 40-60 over best off is to resleave it at one time most people told me there are over 20 million 350 blocks out there from 1968--86 Now the MR Goodwerch has a good deal out and there costing on the block is the 3970010 350 block 4 bolt main 290 hp for 1600.00long block brand new Not sure on the casting but i hear now days guys are Resleeving the old 350 blocks

05-07-2011, 06:49 AM	#11
sean1969c10 Registered User Join Date: Mar 2008 Location: Powhatan, Va. Posts: 376	Re: What is this motor I see no reason to be afraid of a 1 pc rear main seal block for a street or street and strip application. They have a lot of thing going for them : better gasket sealing surfaces, many have factory roller cam, 1 pc rear main seal, and just better machine work from GM. If you start making more than 500hp you really need to start thinking about an aftermarket block, just to protect your investment in parts. I can't imagine sleeving 8 holes in a block unless it was numbers matching for something very valuable. At the shop where I work we charge 175.00 per hole to sleeve a cylnder. It is a lot of work to do it right, I have seen many blocks that were sleeved where the sleeve moved causing the engine to have head gasket problems or consume oil and ultimately have to have the block replaced. I have seen some blocks go .080, I wouldn't want it. I have also have had a 3970010 block bored .060 in my Nova window a cylnder at 6500 rpm. I found chunks of cylnder that were under .050 thick. My advise is to have a block sonic checked before going .060. Just my .02c



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