1990's engine identification help???

Killer spoons · October 24, 2014

I just bought a truck and the guy gave me a 1990's truck engine in with it. He said it was from a 1996 but I want to check

The only thing I know about the engine is it is a 5.7l. I have looked it up to check but couldn't find anything

This is want I found on the back of the block

GM 5.7lg

SGI

CK194

14093638

Thanks

Chris · October 25, 2014

Post a pic of the intake manifold

Chris · October 25, 2014

10243880 is a Vortec centerbolt 2 or 4 bolt zz4 roller cam motor

Looks like your casting number is an 89-95 350

http://www.chevytalk.org/fusionbb/showtopic.php?tid/254537/

Killer spoons · October 25, 2014

found out when it was made

november 19, 1994

Duelin · October 25, 2014

14093638 350cu 87-95 2 or 4 bolt main, Roller or flat tappet cam, one-piece rear seal

Rag Man · February 13, 2019

I bought a 98 Chevy Silverado has a plastic breather box on top of throttle body with VORTEC on it. Guy I bought it from said it was a 5.7 VORTEC however.... I spunt a rod bearing or two lol

Anyway.. I pulled engine out to replace crankshaft and all the bearings ( rod and mains ) put it on my stand and look down to

" GM LG 5.0 SGI " ?? both sides have the numbers 878 on heads on the right side back of block has numbers 10243878.. can anyone please help with just what I do have here ??

Edited February 13, 2019 by Rag Man
Forgot to say it said 5.0

TW97C1500 · February 17, 2019

Rag Man, sounds like you have a 305 (5.0 liter) and not a 350 (5.7 liter). I've never actually looked at a 305 block, but all of the 350's I've seen have 5.7 cast on them.

On the truck's radiator cross-support, is the sticker still there that shows the belt routing diagram? It should say 5.0L or 5.7L, well that would be what originally came in the truck, and the PO probably removed that if it said "5.0L". Maybe he just didn't know and thought all Vortec's were 350's.

Even the V-6's had "Vortec" on the plastic breather box.

Edited February 17, 2019 by TW97C1500
typo

TW97C1500 · February 17, 2019

When you have the oil pan off, measure the stroke. Don't quote me on this, I forget the exact numbers, but a 305 will be 3.06 (3-1/16") and a 350 will be 3.56 (3-9/16").

Maybe it is 2-15/16" for a 305 and 3-7/16" for a 350.

Or maybe it is 1/32" either side of 3" and 3-1/2".

Heck, duh, the easy way to say it is if the stroke is roughly 3" you have a 305. If it is roughly 3-1/2" you have a 350.