Gary '09 C6

^ because GM obviously doesn't want to fix/replace up to 30,000+ LS7s...

Grabber07'

Understandable, but the fact remains...

Dirty Howie

My plugs were perfect but guides worn. My geometry was good too


DH

2k Cobra

And the moon is made of green cheese.

Frankie2blue

GM is not going to do a thing unless there is a well organized class action law suit that makes a lot of noise, and I just don't see that happening.

'06 Quicksilver Z06

Probably won't happen.

These cars are out of production and obsolete.

With the passing of each day, and with it, the shortening of each warranty, GM gets farther off the hook for this matter.

1981turbota

The engine still is under warranty, but since it was originally sold in the US and it's now in Germany, the warranty doesn't do much good.

I really wish GM would step up to the plate...it seems like quite a few LS7's will run a good long time with worn guides, and others pop. Seems like GM is willing to quietly eat this one....what a shame.

After the fix though, my mind will be at ease!

show723

I'm located in upstate ny, and I have a 2007 Z with 25k, tell me if I'm wrong but I'm leaning towards getting the entire heads done since 07's are notorious for broken rocker arm needle bearings also. So if I do get them done, anyone know about how much this will set me back? And what shop could work on them for me around upstate ny? Thank you in advance!

mjoacim

Are those just factory LS7 heads that have been redone by RPM that you're putting on in place of the worn ones?

Vette @ 71

Quick, while recognizing a wealth of info is already on this forum, I wonder if you , as the archival master on dropped valves/guides out of spec, if it would be possible to pull together from the known data base a simple tabulation relating valve dropping/out of spec guides to type of driving style i.e. track/no track/mod's (when listed) that the car was subjected to..Very simple tabulation without much detail like:

Car x dropped a valve at xxxmiles was tracked no mod's
Car y guides out of spec xxx miles no dropped valve no track w/mods (cam)

I think it would help the community to see at a glance and compare how their style of driving compares to those unfortunate and assess the likelyhood of having a problem downstream. Realizing it would be more qualitative than quantative but it would certainly be informative..

240sx2jz

fairly sure that already exists, and not to sound harsh...but, what does that really do for us?? we already know there IS a problem, either attempt to fix it or let the warranty back you. we ahve seen worn guides with 5k on them and we have seen motors that last 250k without a hitch. Lets you know that you need to do your own investigation and address the issue, or let it ride and hope the warranty gods are in your favor.

jedblanks

I have checked 3 Zs
Mine: 16k - Babied garage queen, 3rd owner. Evidence suggests car was well taken care of and not raced- .0100 wiggle
24k 08z, new owner, 3rd owner .0070 -.0080 wiggle
14k 08z, orig owner, 1 owner, .0100 wiggle.

I hope to check a 4k mile 07 z soon.

It's anecdotal, but I don't see a trend other than the amount of wear.

1981turbota

They are stock 2006 LS7 heads that were gone through by RPM. If I was in the US, I'd ride the warranty out, worst that could happen if it pops is I get a fresh motor.

The problem is widespead indeed, I wish mine was one of the "good" ones

mjoacim

Gotcha. Would you mind PM'ing me what you paid for the heads or to have them done by RPM? I think you did the right thing. I'd never want to leave it to chance, have something happen and then have to deal with a dealer and warranty while my car sits with its guts hanging out. Just me.

'06 Quicksilver Z06

Some of the work has been done with regard to that, and I can tell you that such an endeavor is exhaustive.

In the following link, I was handing off the listing to Bill Dearborn.

It listed all of the stock and modified LS7 engine failures regardless as to reported reason. The stock ones, where I knew mileage, I put it down.

The modified ones, some of them I hyperlinked, feeling that if the reader needed more information about the car and the owner, that he could do so on his own.

http://forums.corvetteforum.com/c6-z...post1581584713

In this next link, I added a few more, (I believe that there were 12 new engine failure incidents reported by owners after 9/26/12) after it became apparent that no one was going to pick up the chore of documenting the LS7 failures on this forum.

http://forums.corvetteforum.com/c6-z...post1583345762

When it was felt that oil might have something to do with the valve related incidents in the bone stock listing, I even had a version of that listing where I put down what oil the owner was using if he had stated it anywhere in any of his prior postings, but this became impractical after awhile.

In a nutshell, doing even the amount of work that I have done with these listings, there was/is still bickering and arguing, so there really became no point to working on it any further in terms of listing mileage, track use or not, etc.

In fact, there are still a few die hards who don't to this day, believe that a problem with some of these cars even exists. When GM came out with their "announcement" for lack of a better term, and started giving out case numbers on this matter, there were those in here saying that the announcement had actually come from some "teenager working at Wendy's from his laptop".

You typically find three stages, or different classes, or groups in here, when it comes to naysayers on this issue.

1. People who still deny that a problem even exists.

2. People who now begrudgingly go ahead and admit that a problem does exists, at least in "a few" cars, and who aggressively disagree with the most popular, and thus far seemingly effective route of managing it.

3. People who readily admit that a problem exists, an admission which is usually a result of overwhelming evidence and continued reports of problems and issues thought to be precursors of valve drop incidents, but disagree, usually aggressively, with the most popular, and thus far seemingly effective route of managing it.

So really, when you are up against attitudes like that, what really becomes the point of going any further to archive this stuff beyond that which it has been already.

People are focusing now on "guide wear", more so than they are outright engine failures, and in a warped sort of way, an LS7 engine failure in here, is no longer "news". So like you say, we already know that there is a problem.

azZ06Mike

Well performance cars come with performance parts thus you have to maintain them. I would love to see a law suit but yeah it's not going to happen. For me it was simple take the heads off and have WCCH do their magic and never worry about this issue.

To me now the Z06 is an awesome car and when you really look at the performance enhancements these cars have you just can't find another car in the price range with them. So yes paying $1200 to $1800 for a fix that GM should take care sucks the other side of it is your in an awesome car.

2k Cobra

^

I agree with you mike. If I didn't like the car so much, I would dump it in a heartbeat.

I will remember this issue well when I buy my next car and truck.

azZ06Mike

Agreed! I just bought a new Jeep over a GM. But as for the Z06 i had no desire to drive a Mustang that lacks so many of the Z06 features.

TARANTULA

4. People who don't care because they still have warranty

azZ06Mike

^^^yep!