I have a 2014 with 6000 miles so far

No issue's yet

 

Do they put Z51 badges on purses ? ..................

 

On the 500 mile first oil change, who would ever want to leave all that assembly and break-in wear debris in the engine longer than that? It is critical with any engine to get the factory fill out after initial break-in of 400-500 miles or all particles under 15 microns in size that oil filter cannot trap are constantly circulating and causing premature wear. Invest the amount of $ into a car such as this and I have no problem paying for an oil change the dealer may not.

The real only other issues common to all are GDI related, and those can be avoided if done properly from the start.

These are awesome cars for the $ and what they do, and all mass produced vehicles will have issues, just understanding what to watch for and how to properly care for them is key.

 

Right now there isnt a car thats better looking and faster for the money. its one of the best values.

I plan on selling mine in a few years because i honestly dont feel this car is going to last for years. The engine has the flawed GDI design, AFM, and electric diff (Z51).

 

Gotta agree. For the money this car will equal or exceed most any Super Car costing many times the amount!

 

 

How many miles do you have?

 

Heh ............. That may just be G M's mindset. If they can get peeps back to trading in every three years, just think how much profit they'd make ................ Damn would that generate so cool dividends !

 

There's C7's out there with over 50,000 miles so far and going strong.I want to see how it goes when they have 100,000 on them.

 

C5 with 140k miles on it:



C7 with 5500 miles on it:


I really want to inspect a C7 w/50k miles on it to see the amount of buildup at that many miles.

Anyone with one that is willing to inspect, let me know!!!

 

You may get your wish some time within the next year. I have just under 4k miles on my '16 that I took delivery of on the 14th of Dec. Considering my next trip in late spring will be right at 5k miles by its self ........

 

I had a C6 for 7 years and had ZERO issues mechanically, ZERO. the only issues I ever had were a little too much noise because of a lack of effort on GM's part to insulate the rear area (mostly below the pillar area, I took the whole interior apart seats and all and insulated it really well and problem solved) ive had a 2016 since September with zero issues as well except for the noise again which I can fix easily again.
There are always engine failures with everycar made and the guys crying about it are really really loud even when GM takes care of it free of charge and I get that, But like the old saying goes "make a customer happy they tell everyone in the parking lot how great it was, make someone unhappy and they tell everyone in town about it" So you may of heard of a couple horror stories but trust me for every "one" unhappy vette owner there are a million "happy" ones you just don't hear about it.
By far the best most distinctive sports car ever ever ever built. buy one and the odd's are in your favor you wont be the 1 in a million. And I also agree and I was a tech for 20 years myself once the engine gets thru the first 1500 miles the engine life is good to go. paul

side note: I just saw a 2000 vette on craiglist, I was reaind thru the details and noticed he had 286,000 miles on it. I made the guy an offer and he thinks he is going to take it. that's a pretty good story that if you take care of the car (oil changes, transmission changes etc..) the car will last along time. Since I have multiple cars and bikes I only put about 3k on my vette's a year so to get to 286,000 miles on a car for me would take ruffly 95.33 years. that's kjinda funny when you look at it that way, lol. paul

 

Just because the last generation corvette didn't have problems doesn't mean this one wont.

GM introduced a lot of new tech to the corvette. Stuff like direction injection (which is proven to be problematic), AFM, more electronics,more dry sumps, more dealership techs that dont understand corvettes etc..

I would say the best engine GM made in recent history is the LS3. Was port injection and didnt have any of the fuel saving crap the LT1 has. It was simple to take apart also.

If i wanted to keep my corvette for many many years. I would be tempted to get a Ls7 engine swap instead of trying to make the LT1 better.

with all that said. I do feel however the c7 is probably a very reliable car short term. I think my corvette will be somewhat problem feel until the next generation comes out.

 

There were just as many (if not more) problematic posts about the previous C6 gen. Remember the dreaded "Battery drain " issue. Heck they are still sending recall notices about other issues. Yet I had a 2007 and it was flawless.

Go cruise other forms for other makes and models. You will find just as many issues and rants.
Like we say here.....It just takes one "Oh Boy!" to ruin many, many "Atta boys". Which can be kind of like reading a bad C7 post on forums. Yea problems exists but I will always roll the dice with these cars...

BTW, My 2014 is awesome!



Ed

 

Cool. As many more examples that we can see pictures of, the better. I really want to see more with higher miles on as that is the most difficult to find. Thx!

Many LS based examples of the port injection engines lasting 200-300k plus miles in cars and trucks where they were maintained, but we all remeber the piston slap and oil consumption issues as well. No reason a C5 or C6 would not go that far. Cool story! You can find used C5's so dang cheap if you look now.

Hey Ed,

Can you pull your IM and take some close-ups of your intake valves? How many miles on it to date? Really want to see higher mileage examples to get an idea of progression.

 

It seems the manufactures are dismissing the DI buildup on the intake valves. It seems only Toyota/Lexus is addressing this with port and direct injection. Rumors say VW/Audi has something coming, but nothing official. How hard is it to have both.

 

Direct injection motors have issues across the manufacture's spectrum with respect to carbon build up on valves.

My E90 ('07-'10'ish) BMW forums have stories of folks doing 'walnut blasting' (google it) on direct injection motors with as few as 20-30K miles. There are some pretty gnarly pics out there of valves that have so much carbon on them that the valve stem looks like a 'blob'.

I've read about the same issues on the CTS forums.

When the detergent in the gasoline no longer can clean your valves (because the intake tract is now dry, instead of wet) what can you expect?

 

That looks like something from my ex wife's dishwasher ...............

 

All are actually, just none are admitting publicly the extent of this issue as the fear, and well founded, is that there will be a backlash of those NOT buying new and keeping older port injection vehicles. SO at all cost's, this is downplayed. Now, on Toyota/Lexus/Audi/VW and more are adding back in small port fuel injectors, but as they are too little as far as fuel contact, they have limited actual reduction in the coking. (some coking will always occur W/GDI due to cylinder back-fill for EGR emulation, but that is minor compared to what comes from the PCV system) What this does do is create a situation of now allowing fuel to be present during the compression stroke, and that increases the rate of detonation and thus greater KR which decreases both power and fuel economy as most GDI engines now are 11.5:1 or higher CR (Audi is running 19:1 in the lab!!!!) so that is not a good solution to date. Same with multiple fuel events (triggering a momentary spray from the DI injectors when the intake valve is open). The best preventative is always run a premium full synthetic oil, never a "blend" like the Dexos blend or a conventional is worse yet. All manufacturers recommend a top tier fuel, but after 7 years of study, we see little to no impact over generic fuels as the detergent is no longer showering and cooling/cleaning the valves as with port injection.. so this is not helping. Using a seafoam type solvent based cleaner while engine is running is causing damage in most cases and NOT to be used (no matter what they claim, we always see scouring to the pistons and cylinders from these hard crystaline type deposits are like pouring some sand into the cylinder as the high heat range these valves now run at bake the deposits over time to very hard abrasive particles.

Defeating the PCV systems functions like breather/tanks will cause the engine to wear far more rapidly by leaving most all of the damaging combustion by-products in the crankcase contaminating the engine oil, so only a truly effective separation system will stop most of this from occurring. Elite E2-X or ColoradoSPeed's separators.

Absolutely 100% correct. This affects every auto maker in the World, here are pictures posted by techs and DIY people from around the World:

https://www.google.com/search?q=dire...w=1600&bih=775

These are NOT your old port injection engines that eliminated these issues that used to be present in carbureted engines of old, it is now back and many times more severe than ever.

Those mushroom deposits show how these are also wearing the valve guides prematurely as with each cycle of the valve the stem entering the guide is pulling some into the guide and wearing the softer guide.

As more mile accumulate and we study more, we find more issue long term when to begin with we assumed it was just degradation in power and economy/efficiency from the flow disruption, but were seeing far more issues.

The true OEM solution is still a few years away, it involves an external separation systems like those mentioned, but that never need to be end user emptied. That design is complete and proven to meet all emission standards, but Patent is in the Provisional stage currently before it is presented to the Automakers.

Excellent activity here!!! Great understanding Muncie!

 

Yes, I would BUY another C7. No problems here.