All C6 Guys, Need your Help & Votes!!!
02-06-2015, 07:12 PM
#1
Drifting
Thread Starter
All C6 Guys, Need your Help & Votes!!!
Time to vote to get an Official Reply from GM on the C6 Z06 LS7 Cylinder Head issue:
https://www.corvetteforum.com/forums...ead-issue.html
Here is the question:
https://www.corvetteforum.com/forums...ead-issue.html
Here is the question:
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.
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.
Last edited by AZDANZ06; 02-06-2015 at 07:15 PM.
02-06-2015, 07:22 PM
#3
Drifting
Thread Starter
Yes, it is due to the fact that each week the voting is done again, last week the C5 guys won the total amount of votes to have Tadge reply to their parts question.
So this week is a whole new voting process again, while I think it is stupid having to vote over and over until a particular question gets answered, well that's just how the guy running the "Ask Tadge" section is doing it.
Appreciate your time to click and vote for the LS7 Issue
So this week is a whole new voting process again, while I think it is stupid having to vote over and over until a particular question gets answered, well that's just how the guy running the "Ask Tadge" section is doing it.
Appreciate your time to click and vote for the LS7 Issue
Last edited by AZDANZ06; 02-06-2015 at 07:41 PM.
02-06-2015, 08:49 PM
#6
Drifting
Sad, but the C7 people seem to be controlling the vote. Make sure you vote in the "Ask Tadge" section to see if we can get answers about LS7 valve/head issues.
02-07-2015, 08:01 AM
#7
Melting Slicks
You guys are controlling the vote!
You need to Vote, to get the most votes.
Vote now!
https://www.corvetteforum.com/forums...eb-2015-a.html
You need to Vote, to get the most votes.
Vote now!
https://www.corvetteforum.com/forums...eb-2015-a.html