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I find it hard to believe that if you bent a rod, that there wasn't any scuffing on that cylinder wall. When I took my EB Flex in for a slight miss at idle, they found 2 pistons with ringland fractures plus another with a slightly bent rod. It was so slight that one had to look at it twice, but the cylinder wall was still scuffed. Ford said I had to have a long block replacement, which is what I did. I would demand the engine, at least a short block, be replaced.
So the "oil filter" excuse GM gave just didn't pass the giggle test. First, engine bearings are designed to take a beating and aborb some FOD; there's no reason that much could be produced on such a low mileage engine. So after talking to 'someone' who has been working on the actual development of this engine, he noted a couple things. FYI - not giving out his contact/info bc this info could obviously effect his employment.
A.) He knows for a fact GM recieved a bad set of con-rod bolts. These bolts are in production engines and GM has in fact, popped LT1's on stands during tests because of them.
B.) The crank in these things are weak and suffer material uniformity issues mainly due to the manganese. There are process quality and lack of process issues that are allowing cranks go out the door with microstructure issues. Combine this with the fact the motor is on the edge of what they can get out of 91 octane without detonation, these issues combined allow defective crank issues to fatigue fail. Several LT1's on test stands have also popped because of this. This issue is more pronounced on the V6 that's based on the LT1 that goes in the truck.
Thing that is disheartening is the C&D car where GM stated it was the oil filter; this obviously isn't an oil filter issue. There is simply no way that much FOD could be created and cause such catastrophic failure in such a short time frame. In regards to the OP's car, something obviously let go without warning. I'd imagine that if the thrust bearing failed, there would be some god awful noises coming out of that motor prior. . . not just a "Pop. . .and I'm dead." The fact that it let go while cruising without warning (no overheating, oil pressure issues, etc) leads me to believe its indeed a material microstructure issue leading to fatigue failure. If it was oil debris, which it would have to be a significant amount, one would expect the bearings to start failing prior, causing the motor to tighten up if it didn't over heat, and/or cause an issue with oil pressure.
Wow. 3 posters in this thread already with engines down with bearing damage.
Not sure what is going on with this issue. Hopefully is isolated and general to the whole fleet. A bit disturbing.
OP, DCBE and Frank - sorry you guys have to go through this. Any concrete info you learn on cause, please post it.
Pushing any oil is bad sign! Plenty on here do! Some one pulled the engine on here on there 2014 and the clearances were very bad. The engine's may be faulty bores!
^^^^ +1.....plus, the people on this thread that are "stirring the pot" are not helping either.
Agree with Steven Bell.... the OP is a person I know as he is a coworker that had his new Vette on order at the same time I had mine AW Z51 being built. It's horrible that this happened on such a new car so hopefully others that have had similar experiences can share some valuable information and insights on their resolutions.
People will worry because of these occurrences (rightfully so) but hopefully the forum helps with the sharing of information from others that have lost an engine.
Let them fix the car and then drive it. This is why new cars come with warranties. Forget all the BS about resale value as having parts replaced doesn't lower the value especially if you put some miles on the car to show it actually runs for some time afterwards. Many brands of cars have engine failures and many people are driving perfectly reliable engines that were repaired by a mechanic in a dealer's shop. You don't have to be a master engine builder to repair the engine. Hell, there are plenty of people who get caught up without warranty coverage, can't afford a trained mechanic and do great jobs in their back yards.
I was so excited when I bought my new C6 and was quickly disappointed after it had several issues (problems) we are all now familiar with. Well, it was that experience in 2005 that made me swear off of ever purchasing a first or second year new design. There are just too many unknown problems and I for one do not want to give my money to GM (or any car manufacturer) so they can test a car in real world conditions in order to work out the problems. I know many are excited as I was about acquiring a new corvette, but think twice about going through with the purchase until all the issues are resolved.
Sure, they will fix it. However, what happens in a few years when its off warranty and the poor design causes an additional failure? I'm just saying.....
Lemon laws don't mandate a new car for one failure. There are conditions attached about repeat failures, repeated attempts at repair, etc. One failure and repair won't invoke the lemon law.
You can. There's a thread here that was started a few days ago about this and Chevrolet Customer Service posted a reply stating unequivocally that the four free oil changes in the first two years can be done at any time, regardless of what the DIC says. See post #26 in this thread: https://www.corvetteforum.com/forums...l-changes.html
My 2 cents.... If it really is due to Bad oil filters, metal shavings in the oil etc., wouldn't they just issue a recall for an oil & filter change? Wouldn't that have to be the least expensive recall, ever?
I am going to take an educated guess that the real culprit here are the new Polymer Coated Rod Bearings in the LT1.
Thoughts?
Last edited by V60050; Sep 13, 2014 at 02:00 PM.
Reason: Grammar
V60050
I agree with you, but GM will handle the issue on cars already out there like they did with the valve problems on the LS7. Its cheaper to rebuild the engines as they fail then it is to replace or fix the problems in every single vehicle. When the LS7 would drop a valve they would fix it if still under warranty. However, they never replaced the valves which ended up being the actual cause of the failure.
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