ZZZ0006 Posted January 31, 2015 Share Posted January 31, 2015 Over at the Corvette Forum there is an opportunity for questions to be answered by Corvette's Chief Engineer Tadge Juechter, there are (5) Questions that are on a poll right now, the one with the most votes will be emailed to him tomorrow for him to reply to. We all know the LS7 Cylinder Head Issue with the Valve Guide Problem, this is the question we need your votes on please!!! Tadge, I am writing to you on behalf of all C6 Z06 Owners here at the Corvette Forum. There has been way too many C6 Z06 owners that have suffered LS7 engine failures due to dropped valves. GM claims that there was a manufacturing problem that was subsequently corrected, yet engines and off the shelf replacement cylinder heads produced after that date are also failing at an alarming rate. Loyal owners of even extremely low mileage vehicles are continuing to measure valve-to-guide clearances far beyond service limits and have had their heads reworked at a significant cost. This is evidenced by a cross section of Corvette Forum Members who have had their valve-to-guide clearances measured, 88% of the 208 member cars checked have had out of spec valve guides on C6 Z06's built from 2006 through 2013. With the apparent widespread incidence of excessive valve guide wear among LS7's, does GM know anything regarding the root cause of the issue and/or potential mitigation actions in order for LS7 owners to regain confidence in the platform and to retain loyal GM Customers? We look forward to your answer on this critical issue. Here is the link to Vote for this question: C6 Z06 Question for Tadge Juechter http://www.corvetteforum.com/forums/ask-tadge/3599527-ask-tadge-poll-week-ending-30-jan-2015-a.html Link to comment Share on other sites More sharing options...
old yeller Posted January 31, 2015 Share Posted January 31, 2015 Great question. I wonder if he will answer it considering who signs his paycheck. Link to comment Share on other sites More sharing options...
ZZZ0006 Posted January 31, 2015 Author Share Posted January 31, 2015 Great question. I wonder if he will answer it considering who signs his paycheck. We will not know how he answers it unless we have the most votes, please vote for this question on the forum if you are signed up over there!!! Link to comment Share on other sites More sharing options...
old yeller Posted January 31, 2015 Share Posted January 31, 2015 I am not. One forum is enough for me!! Link to comment Share on other sites More sharing options...
Chameleon Posted January 31, 2015 Share Posted January 31, 2015 I am not. One forum is enough for me!! X2. . . I can barely keep up with what's going on around here! Link to comment Share on other sites More sharing options...
P51tj Posted January 31, 2015 Share Posted January 31, 2015 voted Link to comment Share on other sites More sharing options...
ZZZ0006 Posted January 31, 2015 Author Share Posted January 31, 2015 voted Thanks!! Link to comment Share on other sites More sharing options...
Shifty Posted January 31, 2015 Share Posted January 31, 2015 Voted! Link to comment Share on other sites More sharing options...
ZZZ0006 Posted January 31, 2015 Author Share Posted January 31, 2015 Voted! Thanks!!! Keep the votes coming. Link to comment Share on other sites More sharing options...
Grape Ape Posted January 31, 2015 Share Posted January 31, 2015 Done... Link to comment Share on other sites More sharing options...
ChadC Posted January 31, 2015 Share Posted January 31, 2015 while it sucks for the 98 to 2000 cars and MIA parts, but the LS7 heads are far more wide spread, damaging (engine loss) and current. voted. Link to comment Share on other sites More sharing options...
ZZZ0006 Posted January 31, 2015 Author Share Posted January 31, 2015 while it sucks for the 98 to 2000 cars and MIA parts, but the LS7 heads are far more wide spread, damaging (engine loss) and current. voted. The 98 to 2000 cars will be submitted the following Sunday, it's not out of the race if it loses today, just has to wait a week. Thanks for voting!! Link to comment Share on other sites More sharing options...
TheCMSH Posted January 31, 2015 Share Posted January 31, 2015 He's not going to shoot himself in the foot, this question will be answered with the GM legal-ese or "what problem?". I think it's a complete waste of a question but I voted regardless just to help I'm interested in the C5 issues, whole slew of cars out there being driven or about to be driven without ABS due to no EBCM's and a bunch about to hit the scrap heap due to no replacement ECM's. 97 - 00 Corvette about to become the new C4...........(sorry Larry, only analogy I could think of ) Link to comment Share on other sites More sharing options...
ZZZ0006 Posted January 31, 2015 Author Share Posted January 31, 2015 Well the C5 issue is leading the votes today, no big deal as the LS7 question will most likely be sent out the following weekend. I think both items are absurd to not have parts for C5's and LS7 engines blowing up due to dropped valves, pick your poison I guess. Link to comment Share on other sites More sharing options...
Cross Posted January 31, 2015 Share Posted January 31, 2015 Gave you a vote, only because the C5 is gone and well... I no longer have to deal with that. I can tell you when I buy a new Vette if it's a C5 it will be an 01+ Link to comment Share on other sites More sharing options...
LastC3 Posted February 1, 2015 Share Posted February 1, 2015 Voted ... it would seem the LS7 question would much more important here ..... but what do i know ....... Link to comment Share on other sites More sharing options...
ZZZ0006 Posted February 1, 2015 Author Share Posted February 1, 2015 Voted ... it would seem the LS7 question would much more important here ..... but what do i know ....... That's what all of us thought as well, but the C5 guys came out in force and stacked up the votes. I have already fixed my heads, was trying to help others if GM would accept responsibility and actually do something about it - which I highly doubt they ever will. Link to comment Share on other sites More sharing options...
Mregor Posted February 3, 2015 Share Posted February 3, 2015 Doubt we'll get anything different from the official release, but interested to see as I haven't modded mine yet at 43k miles. Link to comment Share on other sites More sharing options...
ZZZ0006 Posted February 7, 2015 Author Share Posted February 7, 2015 OK, voting has begun once again to have this question be submitted to GM's Tadge Juechter, sorry we have to do this again, the C5 question votes beat us out last weekend: Time to vote to get an Official Reply from GM on this issue: http://www.corvetteforum.com/forums/c6-z06-discussion/3603118-time-to-vote-once-again-ls7-head-issue.html Link to comment Share on other sites More sharing options...
ZZZ0006 Posted February 8, 2015 Author Share Posted February 8, 2015 We won the vote this week, so the question was emailed to Tadge on the LS7 Head Issue, will be very interested in his reply. Link to comment Share on other sites More sharing options...
Mregor Posted February 10, 2015 Share Posted February 10, 2015 Link to comment Share on other sites More sharing options...
Final Effort Posted February 10, 2015 Share Posted February 10, 2015 The reply. What is this valve guide problem you speak of ? We at GM haven't heard anything about this. I'll have to speak to our engineering department and get back to you. Link to comment Share on other sites More sharing options...
ZZZ0006 Posted February 10, 2015 Author Share Posted February 10, 2015 The reply. What is this valve guide problem you speak of ? We at GM haven't heard anything about this. I'll have to speak to our engineering department and get back to you. What valve problem? This is the first time we have heard of it. If their reply is BS, I will never buy another GM product again. Link to comment Share on other sites More sharing options...
Chameleon Posted February 11, 2015 Share Posted February 11, 2015 Or, perhaps the silence from GM will be deafening. . . Link to comment Share on other sites More sharing options...
old yeller Posted February 28, 2015 Share Posted February 28, 2015 It kind of looks like this blew up on Corvette Forum........ Did the question ever get answered? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now