ls1 or ls2-3?

[hoogiesngrinderz]

Your B1 is cast into the passenger side front of the block. 1 and 2 in the diagram are pointing towards two areas that are on the driver side rear of the block.

[Fox Slaughter]

http://m.modmotortech.com/forums/sho....php?t=1470012

[r1cefed]

I am almost 100% positive you have an LS2. From what I am not sure. Probably a late LS2. My girlfriends trailblazer SS ls2 has the rubber cover over the valley cover port as well.

The intake is most definatley a stock Ls1 intake. Ls2 intakes are multipiece molded together and it is obvious what they are because of the MAP sensor port on top as well. Fuel rails are stock Ls1 rails. Throttle body is nothing but an Ls1 because it is using 3 bolts. Ls2/3s use 4 now and do not use throttle cable brackets.

It is safe to say you have a single bolt cam Ls2 judging by the valley cover as well. Most definatley not an Ls3 though. Was this the car for sale on craigslist a while back saying it had an ls3 crate motor? If so I would be very pissed they most definatley false advertised. The block could still be a 6.2 as far as we know know but a 6.2 block is not an ls3.

[TRY MEH]

I am almost 100% positive you have an LS2. From what I am not sure. Probably a late LS2. My girlfriends trailblazer SS ls2 has the rubber cover over the valley cover port as well.

The intake is most definatley a stock Ls1 intake. Ls2 intakes are multipiece molded together and it is obvious what they are because of the MAP sensor port on top as well. Fuel rails are stock Ls1 rails. Throttle body is nothing but an Ls1 because it is using 3 bolts. Ls2/3s use 4 now and do not use throttle cable brackets.

It is safe to say you have a single bolt cam Ls2 judging by the valley cover as well. Most definatley not an Ls3 though. Was this the car for sale on craigslist a while back saying it had an ls3 crate motor? If so I would be very pissed they most definatley false advertised. The block could still be a 6.2 as far as we know know but a 6.2 block is not an ls3.

I am almost 100% positive you have an LS2. From what I am not sure. Probably a late LS2. My girlfriends trailblazer SS ls2 has the rubber cover over the valley cover port as well.

The intake is most definatley a stock Ls1 intake. Ls2 intakes are multipiece molded together and it is obvious what they are because of the MAP sensor port on top as well. Fuel rails are stock Ls1 rails. Throttle body is nothing but an Ls1 because it is using 3 bolts. Ls2/3s use 4 now and do not use throttle cable brackets.

It is safe to say you have a single bolt cam Ls2 judging by the valley cover as well. Most definatley not an Ls3 though. Was this the car for sale on craigslist a while back saying it had an ls3 crate motor? If so I would be very pissed they most definatley false advertised. The block could still be a 6.2 as far as we know know but a 6.2 block is not an ls3.

it was for sale on CL about a year ago.. he did say it is a ls3 and also gave me some 6.2L ls3 paper work.. but the paper work was so shity it was just a invoice looked like he typed up im almost positive he is lying but i talked to him not long ago asking what it is he said they sent him wrong motor first time it was a 5.3 truck motor or something then got it back 2nd time he said hes postie its not a ls1 "he did confess and say it might be a ls2 or 3" i dont know why he would lie over something like that lol... but anyways i wouldn't be all to mad if it is a ls1 car has plenty of power and motor sounds healthy good compression oil pressure ect is perfect or better

that last link was my link on ls1 tech long ago lol =D

[DETROITMUSCLE]

whats the deal with the coolant tube coming out of the throttle body? never seen one return to the crossover like that. I assume he kept the external LS1 pcv system if he has the front port capped off, not sure why.

[sman]

Thats because your looking in the wrong spot, lol. In my picture, thats the back of the block(notice the flywheel). Where #1 points to should be way more than 2 characters. Think more like 10.

Unless you get us those numbers, were really only speculating. Those numbers will tell you exactly what you have. Also, getting us the displacement off the front of the block will help.

[TRY MEH]

Yah i looked at pic wrong lol.. ive tried getting casting numbers from there when it was on a hoist.. but its almost inposible there is no room even for my hand

[1BADAIR]

whats the deal with the coolant tube coming out of the throttle body? never seen one return to the crossover like that. I assume he kept the external LS1 pcv system if he has the front port capped off, not sure why.

Ls2 cross over. Ls1 have a port in the drivers side to the tb then from the tb to the rad . Most just skip the tb when other crossovers are used

[shawnc16]

Could also be an LS6. Which brings me to the question of why is the valley cover blocked off and not being used?

Check the block next to the crank pulley, should be a stamping of what size engine it is.

[1BADAIR]

unbolt the a/c bracket and check

[TRY MEH]

unbolt the a/c bracket and check

id rather not do that in this coldish weather lol
poor man live in poor ways haha ghetto garage works great for winter though =)
GEDC2729 - Copy.JPGGEDC2723 - Copy.JPG

[TRY MEH]

im guessing there is no easy way to tell other than taking something apart =/

[sman]

Not really. We know its an LS, we know its aluminum, and thats about it. If you see a 5.7 on the front its an LS6 (which is kinda what I was thinking, would make most sense if it was swapped at a dealer or something like that as the LS6 is the replacement for the LS1 in most applications, not really even sure if you can get an LS1 anymore) but that fails to explain the whole knock sensor thing. 6.0 is obviously LS2, and 6.2 is LS3.

[shawnc16]

That thing would wake up with a different intake on it. I feel bad for that engine if it is an LS3.

[DETROITMUSCLE]

Wouldn't make sense to be an LS6 IMO why would it have the later valley cover hence the reasoning for the relocated knock sensors. I mounted mine the same way with an extension harness from SDPC.