LS2 swapping my 09 G8 and saw a engine mechanical service manual for a gen III LQ4 and it was a complete manual about every single thing and for the past hour ive been trying to find one for the Gen IV LS2 which would greatly help my swap, I have had no luck. Anybody know of a manual for a Gen IV LS2 either a manual, book, or some pdf, am mainly looking for a overview of all the external parts not necessarily torque specs since im using arp bolts which they provide that stuff, just where things are located because i bought the bare block so i never got the chance to take apart a Gen IV LS2
Thanks

 

No such animal unless you're referring to a Haynes or Chilton manual. Everything is digital now. The internet is your best manual. Unless you work at or know someone who works at a GM dealer and can log into GM Global Connect. There we have absolutely everything there is.

 

One thing you might do is buy a COMPLETE junk engine strictly for an anatomy lesson.
That might be your best shot, then you will have first hand knowledge.

 

so that was the original plan to bid on a wrecked g8 and pull engine trans wiring harness and ecu but didnt have much luck with that, my bid limit was 2,000 which is actually high for bidding on a salvaged title, but since the g8 wasnt produced much it shoots the value up a bit and the regular bid was around 3-4k some 12k but that had a full whipple setup on it.
besides the point i saw a great deal on markeplace for a bare ls2 block with 823 ls3 heads and i got that for under 1k and they look brand new while the block has been honed. took that offer up but im not to worried, that gen iii engine manual gives me something to look at and i generally know where everything goes like sensors and such but just thinking more like what ill need to order like hoses or little things i may forget so thats the only thing im worred about.

 

If hoses, sensors, wiring etc are the issue, there are schematics for just about everything on the internet.
Plus there are Haynes manuals for whatever car type you need to look at

 

I was looking at some manuals and one was mainly for gen III and the reviews were saying stay away from it if you have a gen iv because the information is old, there are two manuals for gen iv but they are for max performance build which is awesome but my tuner is helping me build this for my desired hp, since the l76 and ls2 are the same block different heads everything is pretty much the same so if i am struggling i can always take it to the g8 forums, i dont know if those manuals would be worth it or not since its mainly about performance instead of general parts and installation

 

I guess i am just a little confused on the fact since the l76 and ls2 are the same as i said, but since they are different engines i just am trying to figure out what i will need to know such as wiring and sensors because its the same block and both are gen iv so the same sensors are used but from my knowledge two people have done a ls2 swap in their g8 and both are inactive, everything should be fine and i will once im done rebuilding start it up on the stand before hand and have the wiring harness all hooked up which will give me plenty of time before hand to make sure everything will work out because i dont want to take out my engine and trans and then my ls2 dont start or work and now i dont have a running car lol

 

L76 and LS2 are both Gen IV 6.0 engines. The likely use the same sensors, etc. The only difference might be if the LS2 is a 24x crank reluctor (06 and earlier).
If you are swapping a later LS2 for the L76 or even vice-versa, the basic engines are the same except the L76 has AFM/DOD, which can be deactivated.

 

correct, well since its a bare ls2 block i have the decision to choose which reluctor wheel and since the l76 and 2006+ ls2 have a 58x i will go with that so i wont need a wiring harness conversion to connect the 24x to a 58x ecu.

 

How about, just buy the FSM for some car (G8 for example) that came with the LS2. Should be less than $20 on fleabay. Maybe something kinda like this, not necessarily this exact one but no doubt you get the idea. https://www.ebay.com/itm/264800834672

 

ill check it out, also found something which do done the job, its a ls2 all sensor and wiring locations along with external parts, https://support.haltech.com/portal/e...3-gen-4-engine
Also found a GM video of assembling an LS2

 

That video/screensaver is actually the assembly of an LS3 and not an LS2, although it's always been labeled as an LS2 for some reason. There was a similar screensaver that came out at about the same time that showed a 6.2 L92 truck engine that was originally used in the 2007 Escalade/Yukon Denali. I believe Corvette engine one was labeled as an LS2 because its release may have predated the LS3 being announced, but I digress. The only real difference that is noticeable in the video is that the heads are rectangle ports instead of cathedral ports.

As far as your situation, you're really better off just assembling everything as though it's the L76 with the exception of the AFM stuff. The internal differences really don't matter for the stuff on the outside of the engine like sensors and accessories, with the exception of the reluctor wheel and the cam gear, which it sounds like you have a handle on. In reality the L76 that came in the G8 is an LS2 with rectangle port heads and AFM on it. Even the pistons are the same flat tops. If you had the engines next to each other, you'd have to be pretty familiar with them the point out the differences on the outside.

There is a PDF version of the service manual for the GTO available at Mark Quitter Racing's website for free. That would be useful for how to assemble the engine itself albeit with some differences vs what came in the G8. For a big project, I can't recommend having a factory service manual enough. There are some things that the internet just can't explain well or that are not so easy to find info about that are at your fingertips with a manual. It just takes a lot of guesswork out of things.

 

I really appreciate it sir, so actually i am using 823 ls3 heads for my ls2, in the video it shows at the end corvette ls2 on the engine cover, you mentioned it being something to do with the tease of the ls3 in the future. just downloaded the manual, the only thing i am really needing is just all sensor locations and all the small things unique to the ls2 specifically but i actually found a link with all sensor locations for gen 4 6.0 which is perfect, im nervous ofcourse because its my first build and swap but am extremely confident with my knowledge and experience, i also have a tuner , forums, and some irl mechanic friends to help me if its needed so im not to worried.

 

I'm sure you'll be fine with everything. Don't worry if you have to go slow putting it all together; it's better to do it right than fast. Those 823s can support a ton of power with the right stuff in the motor, too.

The G8 is a great car, too. My mom had one new for a few years and later on a friend had one with an LSA blower on it, which had more power than tire. I've had a GTO since it was new, so I'm a big fan of Holdens.

 

Got a quick question, i have found no information on this but since the c6 and 5th gen gto both have the ls2 yet the alternator is located differently on both with one uptop and other down below, i have found alternator relocation kits but that relocates it to the top :/
since the belt order is different on both is that something i can decide when building where i want to mount the alternator either spot

 

I think you should just use the accessory drive off your G8. Unless you have a swap into some no LS car, it's always easiest to use what the car came with. You just have to use a balancer for a Corvette or a G8 because the belts are at the same depth for both. The GTO accessories are arranged the same, but the belts are actually a bit farther from the front of the engine. Swapping alternators around from application to application can be more complicated than you might think as the computer might be unhappy without the correct one on there.

Unless you are changing something for performance or because it was damaged, the stock stuff should be going back on there. I know you're thinking through all of this stuff, which is good, but you also have to be careful not to overthink it.

 

I also tried searching for a manual for IV generation, and any electronic format would work for me, especially PDF, as it’s easier to work with. By the way, I’m currently testing AI PDF Summarizer https://pdfguru.com/ai-pdf-summarizer which does a great job summarizing such PDF files. It’s mainly designed for books and scientific articles, but overall, it can be useful for any files since this online tool has many features that I haven’t fully explored yet.

 

You're a year and a half late to this party. And which manual are you talking about?? You might want to read thru his thread again, unless of course you're just trolling....