View Poll Results: Which Question Should Tadge Answer?
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Ask Tadge Poll: Week Ending 6 Feb, 2015
02-06-2015, 01:04 PM
#1
Tech Contributor
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"Ask Tadge" Producer
Ask Tadge Poll: Week Ending 6 Feb, 2015
Vote for which of these 5 you'd like to have Tadge answer. The winner will be submitted Sunday, 8 Feb. Here are the links to the actual threads:
C6 Z06 and LS7 Question
C7 Z06 and Over-heating on Track
C7 - Dexos1 or Mobil 1
GM Updating Corvettes With Newer Software
C7 Z06 and the Nurburgring
C6 Z06 and LS7 Question
C7 Z06 and Over-heating on Track
C7 - Dexos1 or Mobil 1
GM Updating Corvettes With Newer Software
C7 Z06 and the Nurburgring
02-06-2015, 07:18 PM
#3
Drifting
Thanks 
This question needs answered:
This question needs answered:
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.
02-06-2015, 08:54 PM
#6
Melting Slicks
Really annoying that there is significant concern for a forced induction car to overheat...in the light that so many C6Z owners have to tear into a handbuilt engine to fix something that GM got wrong, or risk BLOWING THE ENGINE!
Cooling is a common concern for FI cars, which is a really good reason to avoid tracking a FI car...
Cooling is a common concern for FI cars, which is a really good reason to avoid tracking a FI car...
02-06-2015, 10:39 PM
#9
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02-07-2015, 09:03 AM
#10
Team Owner
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No-IL Events Coordinator
2020 C6 of the Year Finalist - Unmodified
2020 Corvette of the Year Finalist (appearance mods)
C6 of Year Winner (appearance mods) 2019
2018 C6 of Year Finalist
St. Jude Donor '12-'13-'14-'15-'16-'17-'18-'19-'20-'21-'22-'23-'24
I voted for the LS7 exhaust valve issue and would love to finally have someone at Chevrolet give a definitive answer.
Thank you for creating this section!
Thank you for creating this section!
02-07-2015, 09:21 AM
#11
Melting Slicks
Looks like we are way ahead so far... I have to admit, while I'd love to hear what he has to say about this, not being able to get parts for a C5 is pretty deserving of an answer. I think we are second in line!
02-08-2015, 02:57 PM
#16
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"Ask Tadge" Producer
