[Z06] GM response to LS7 valve guide issue summary confirmed
09-07-2013, 11:20 AM
#2001
Burning Brakes
TSB #13-06-01-001. See http://forums.corvetteforum.com/1582837662-post1.html
Your previous description -- "marbles in a can" -- does not sound like a valve guide problem. They should do what we call the "wiggle test" on your valves... it is described in the TSB. If they:
Your previous description -- "marbles in a can" -- does not sound like a valve guide problem. They should do what we call the "wiggle test" on your valves... it is described in the TSB. If they:
don't know what you are talking about,
don't understand the TSB or
want to remove your cylinder heads to measure them, or if they
are just guessing about the valves without having made any measurements,
I would take my car away from them very, very quickly and find a competent mechanic. If you don't know one, post your location and someone can probably recommend one.don't understand the TSB or
want to remove your cylinder heads to measure them, or if they
are just guessing about the valves without having made any measurements,
Unless his engine has the dreaded sewing machine virus.
09-08-2013, 11:03 AM
#2003
Le Mans Master
Member Since: Dec 2004
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St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
2 of the best recommendations that can be made for you on this forum are right in your back yard, this is the way to go.This LS7 valve issue is sickening.
I loved my black on black 2006 C6 Z and must confess I would have been very content keeping my car for many more years, but this continuing valve issue finally broke my back and made me go to the dark side when I traded my baby in for a 2009 Viper Coupe 7 weeks ago, even though I had 2 more years of GMPP warranty. I just hate having it planted in my mind everytime I go for a 1.5 hr (each way) one day road trip that i might get stranded with a grenaded engine. I am happy with my decision my 600+HP 2009 Viper rocks and I no longer have to worry about this chit, but I did love my C6 Z and would have kept it but for this bull chit that GM does nothing about (and I done with GM they lost another loyal customer, who has owned a vette the last 20 years until now). 
We may take a little heat here but I am right with you.
My Z was the MOST exciting, and loved car I have ever owned.
BUT!!!
09-08-2013, 12:22 PM
#2004
Drifting
I have 2 more years on my warranty then most likely will also bail although I love the look of the Z06. I cannot put enough miles on it within the next 2 yrs to get to the point where the valves would be out of spec.
Sure the heads could be done but the enjoyment is long gone.
I think they could identify which heads have the machining issue. Every part of every car by every manufacturer is recorded. The heads have unique codes machined on them.
This is also my last GM car ever. My sons will never purchase a GM car either.
Sure the heads could be done but the enjoyment is long gone.
I think they could identify which heads have the machining issue. Every part of every car by every manufacturer is recorded. The heads have unique codes machined on them.
This is also my last GM car ever. My sons will never purchase a GM car either.
09-08-2013, 12:31 PM
#2005
Drifting
Member Since: Aug 2009
Location: Colorado Springs Colorado
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i just sold my 2012 centennial edition, so if the new cars are affected its not my problem anymore, going back to lexus! never heard any of them dropping valves..
unsubscribing, wish you guys the best of luck!
unsubscribing, wish you guys the best of luck!
09-08-2013, 01:56 PM
#2007
Team Owner
09-16-2013, 04:19 PM
#2008
So I found this thread by looking up how to fix my valves after taking my 2009 Z to the dealership. I had no idea so many Z owners were having this problem. And I'm surprised it took my Chevy dealership 3 days to give me a diagnostic!!
Initially I thought there was something inside my catalytic cover (marbles in a can noise). The I read up on the O-Ring inside the oil reserve coming loose and passed that bit of info to the Techs. But they finally called me today saying it was most likely the valves. They never mentioned this being a common issues. Unless they had no clue about the GM bulliten regarding this issue.
That brings me to this side question. When GM Tech diagnose a problem and come up with a theory. Is there a data base that shows letters, recalls ect associated with the problem? Such as this valve problem. Have a hard time believing it took them 3 days to figure out what it was.
So my question is this. Do I had a chance in getting this covered by GM? Or should I just start breaking open my piggy bank?
2009 Z06
My warranty expired last month.
No mods to my car and its never been tracked or raced.
Has 44K miles. (Is this considered excessive mileage?)
Initially I thought there was something inside my catalytic cover (marbles in a can noise). The I read up on the O-Ring inside the oil reserve coming loose and passed that bit of info to the Techs. But they finally called me today saying it was most likely the valves. They never mentioned this being a common issues. Unless they had no clue about the GM bulliten regarding this issue.
That brings me to this side question. When GM Tech diagnose a problem and come up with a theory. Is there a data base that shows letters, recalls ect associated with the problem? Such as this valve problem. Have a hard time believing it took them 3 days to figure out what it was.
So my question is this. Do I had a chance in getting this covered by GM? Or should I just start breaking open my piggy bank?
2009 Z06
My warranty expired last month.
No mods to my car and its never been tracked or raced.
Has 44K miles. (Is this considered excessive mileage?)
Do you have an update for us? Is this going to be covered under your warranty? Do you have a case with Customer Care? Keep me posted,
Kelly J.
Chevrolet Customer Care
09-17-2013, 06:04 PM
#2009
Instructor
Member Since: Apr 2012
Location: California
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Hey Kelly, yeah I called and started a case. Took longer than I thought. Because the customer service couldn't not reach my local dealership. I finally got a hold of my service advisor (Brian) and asked if he's spoken to GM Customer service. He was dumbfounded. I said they left you a bunch of messages (3days worth). He checked and said oh I'll get back to them.... Pissed me off.
Anywho spoke with GM and local dealerships service manager on 3way. Pretty much told me he needed an ok from me to tear down the engine to figure out what was wrong. And too see if the cause of the problem was the valves or something else. And if the defective part was a warranted part they could cut down the cost of the repair by 50% or more. He said if it wasn't then I would be responsible for the cost.
So I gave them the "oK" to start. I didn't see any other option. That was on Fri. I should find out tomorrow what there diagnoses is. Customer Care#71-1222747572
If you have any tips or recommendations for me I'm all ears lol
Anywho spoke with GM and local dealerships service manager on 3way. Pretty much told me he needed an ok from me to tear down the engine to figure out what was wrong. And too see if the cause of the problem was the valves or something else. And if the defective part was a warranted part they could cut down the cost of the repair by 50% or more. He said if it wasn't then I would be responsible for the cost.
So I gave them the "oK" to start. I didn't see any other option. That was on Fri. I should find out tomorrow what there diagnoses is. Customer Care#71-1222747572
If you have any tips or recommendations for me I'm all ears lol
09-17-2013, 07:29 PM
#2011
Le Mans Master
09-19-2013, 12:38 PM
#2012
Instructor
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Ok got a call from Chevy today. Service advisor told me one of my cylinders needed to be replaced, Cam shafted needed to be replaced and lifters.... ��
Total cost would be $5K
GM said they would cover 60% leaving me with $1,800.
Total cost would be $5K
GM said they would cover 60% leaving me with $1,800.
09-19-2013, 02:05 PM
#2014
09-19-2013, 02:58 PM
#2015
Just got word from the dealership that my heads are being replaced. Only thing being reused is locks and retainers. This was after multiple visits with me complaining about the excessive ticking noise and using 2qt of oil every 1000 miles. Just in time my warranty expires in 2k miles!
I'm still going to probably replace the guides and valves at some point but I figure I should be safe for a while at least.
With a fresh set of heads how safe is a cam and tune?
::feeling relieved::
I'm still going to probably replace the guides and valves at some point but I figure I should be safe for a while at least.
With a fresh set of heads how safe is a cam and tune?
::feeling relieved::
09-19-2013, 08:41 PM
#2017
Le Mans Master
Help me out here, how do you replace a cylinder and what's wrong with it???
09-19-2013, 09:18 PM
#2018
09-19-2013, 09:24 PM
#2019
Depends on the cam and who does the tune.
The cam alone probably means you're going to have to change other parts in the heads (springs, retainers) so you're really becoming your own valvetrain engineer at that point. Proceed with caution since it is a 7000 RPM engine (the higher the RPM, the less room for error).
The cam alone probably means you're going to have to change other parts in the heads (springs, retainers) so you're really becoming your own valvetrain engineer at that point. Proceed with caution since it is a 7000 RPM engine (the higher the RPM, the less room for error).
No mention of valves?