***6.2 L-92/LS-3 blocks are"GARBAGE"***

[klymaxr]

***6.2 L-92/LS-3 blocks are "GARBAGE"***


I have just purchased the new L-92/LS-3 6.2 ltr block from GM and the casting and machining is PATHETIC to say the least!!! GM should be ashamed to release such garbage in quality control. I am on my third returned block from GM performance parts. Each block has come with the cylinders cast in a different position, so when the boring process was done at the factory,some of the cylinders are @.120 thick on one side and .040 on the other side!! Its as if the liners were just laid in the casting, not being held in place and then when the aluminum was cast around them, they moved. The bores are probably symetrical because they are indexed by a computer but the liners are not. Then theres the mains... You would not believe the amount of deburring that has to be done, its as if they ran the boring bar through at high speed leaving a .020 razor edge at one side of the mains.. and then they don,t even remove it! Just think they are using this block on the new high end trucks as well as...rumor has it.. the new supercharged Corvette! I don't know who is inspecting these blocks before shipping but they should be FIRED and i hope someone that has a friend of a friend that works in GM QA management reads this before they have a complete recall after these engines fail in the field. The liner was so thin on one block that if you added any power enhancment you would probably blow out the WALL.We are now on our third block and are trying to get a hold of a pre inspected block prior to shipping. Time will tell if we get a decent one to work with!!

[SL04P0PR]

dang man. If it weren't for the damn spambot I wouldn't have seen this post. But this is concerning indeed. I wonder if their quality control has improved by now, because judging from what I am seeing in this post it is completely unacceptable.

[Danmuzicman]

we just ripped one down from the crate motor and other than the oil returns that you have to plug, just like in the LS2 it seemed great and it has now stood up to 600hp+ in a new vette with just the bolt ons, cam and the typicals. I read this a while ago and refrenced back to it. We did not seem to have the casting and cylinder liner problems as they all came out fine and the mains were finished well. Did you purchace a short block? we bought whole crate motor. I not defending GM for its poor lack of quality in your case but just trying to find out more problems.

[darkfox]

that's a bit disturbing.

[jeremy96gase]

Originally Posted by darkfox

that's a bit disturbing.

I wouldn't worry about it. This post is a few years old, and the user never came back to this forum after this post.
Sounds like bunk to me.

[Danmuzicman]

yeah all the motors i have seen have been great, plus i mean they supercharged this motor in the zr1 and the cts-v and they make a ton of power.

[zbb689]

i'm going to have to say that GM makes excellent (if not the absolute best) V8s, the LS series is a great example of powerful engines that are also suprisingly fuel efficient... and if you want to see power, look at the LSX block. It's relatively cheap as well.

[Blackhawk355]

I believe the OP was full of shit. I've yet to see one LS3 Vette fail, period.