[Z06] Stock engine dropped valve, GM won't warranty
#21
Team Owner
#22
Safety Car
Member Since: Nov 1999
Location: S.E. WI.
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St. Jude Donor '08-'09-'10
How can you have an engine failure under the GM 5-100, you be in compliance and GM not be responsible?
Why would they go to the trouble of having an outside source evaluate the failed parts?
Why would this process take 2-3 months to reach a conclusion?
I am no fan of the new GM but there seems to be evidence on this forum that GM has been standing behind most engines failures from dropped/broken exhaust valves.
Why would they go to the trouble of having an outside source evaluate the failed parts?
Why would this process take 2-3 months to reach a conclusion?
I am no fan of the new GM but there seems to be evidence on this forum that GM has been standing behind most engines failures from dropped/broken exhaust valves.
#24
Safety Car
Member Since: Jan 2006
Location: Miami FL
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2020 C6 of the Year Finalist - Unmodified
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16,'17,'18-'19-'20-'21-'22
Not impresseed
If the so-called independent expert did not take a metallographic cross section of the valve near the failure point, and do a microstructural evaluation and some microhardness traverses, as well as put the fracture surface in a scanning electron microscope with energy dispersive spectroscopic capabilities, then the report is WORTHLESS. In my opinion as a registered professional engineer in seven states, in both mechanical engineering and METALLURGY. I'm just sayin' . . . . .
#25
Melting Slicks
#26
Melting Slicks
If the so-called independent expert did not take a metallographic cross section of the valve near the failure point, and do a microstructural evaluation and some microhardness traverses, as well as put the fracture surface in a scanning electron microscope with energy dispersive spectroscopic capabilities, then the report is WORTHLESS. In my opinion as a registered professional engineer in seven states, in both mechanical engineering and METALLURGY. I'm just sayin' . . . . .
#28
Safety Car
nobody knows his name so how the hell is anything posted here is evidence of anything. This is hilarious. I bet if you hire a lawyer amd he sends them a letter they'll call to fix the engine. You just have to play hardball
#29
Advanced
If the so-called independent expert did not take a metallographic cross section of the valve near the failure point, and do a microstructural evaluation and some microhardness traverses, as well as put the fracture surface in a scanning electron microscope with energy dispersive spectroscopic capabilities, then the report is WORTHLESS. In my opinion as a registered professional engineer in seven states, in both mechanical engineering and METALLURGY. I'm just sayin' . . . . .
#30
Drifting
I don't understand the inconsistency!
I know of both situation where the motor was not stock & tracked & yet was was warranteed when the motor blew. I also know a a similar situation as this where it was a totally stock motor & the owner had to lawyer up before GM change their tune. I know that one's relationship the service manager do matter as they're the ones that go to bat for the customer. I wish you well & hope you get your motor waranteed. Track or not, if it's stock; it should be waranteed!
#31
Melting Slicks
I still don't understand how this isn't covered under warranty. The drivetrain has a warranty, how can they say it isn't covered no matter what the circumstances: if the motor is stock, there should be no issues.
#33
Team Owner
I think it's a very poor decision on GM's part regardless of their legal responsibility. I'm getting sick of dealing with people/companies who look hard for reasons not to support their customers. I understand them not covering the obvious. That is not the case it sounds like.
Good luck getting them to cover it - I hope you succeed.
Good luck getting them to cover it - I hope you succeed.
#34
Team Owner
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#35
Team Owner
How can you have an engine failure under the GM 5-100, you be in compliance and GM not be responsible?
Why would they go to the trouble of having an outside source evaluate the failed parts?
Why would this process take 2-3 months to reach a conclusion?
I am no fan of the new GM but there seems to be evidence on this forum that GM has been standing behind most engines failures from dropped/broken exhaust valves.
Why would they go to the trouble of having an outside source evaluate the failed parts?
Why would this process take 2-3 months to reach a conclusion?
I am no fan of the new GM but there seems to be evidence on this forum that GM has been standing behind most engines failures from dropped/broken exhaust valves.
#36
Burning Brakes
This is the thanks we tax payers get for loaning GM a few billion.
We can't even get it back in the form of having them stand behind the products for which we've already paid.
I'm looking really hard a buying a ZO6 after I ditch my 06 M5 in the next few weeks. After reading these horror stories about warranty voiding, a turbo Porsche is looking more likely.
We can't even get it back in the form of having them stand behind the products for which we've already paid.
I'm looking really hard a buying a ZO6 after I ditch my 06 M5 in the next few weeks. After reading these horror stories about warranty voiding, a turbo Porsche is looking more likely.
#37
Safety Car
#38
Safety Car
Exactly, there was no official determination on what caused the failure.
Without having a degree in engineering, one can posit, through test, if the exhaust cap has evidence of it coming apart due to a lack of structural rigidy (hollow/sodium filled) or was it due to exssesive heat or lack of oil, for example.
The local rep. Using that specific local engineer should come of no surprise, he/she spins a tale that favors her monthly report/audits so, that same engineer keeps getting used.
My opinion is very simple, lawyer up, provide detailed anaylsis of the failed parts, history of other failures and I formation showing exactly what this car was made to do (as per what was been said by GM representatives) and I'm sure GM and that rep. will change their minds quickly.
GL!
Without having a degree in engineering, one can posit, through test, if the exhaust cap has evidence of it coming apart due to a lack of structural rigidy (hollow/sodium filled) or was it due to exssesive heat or lack of oil, for example.
The local rep. Using that specific local engineer should come of no surprise, he/she spins a tale that favors her monthly report/audits so, that same engineer keeps getting used.
My opinion is very simple, lawyer up, provide detailed anaylsis of the failed parts, history of other failures and I formation showing exactly what this car was made to do (as per what was been said by GM representatives) and I'm sure GM and that rep. will change their minds quickly.
GL!
#39
Drifting
Yup, and if I remember correctly he even bragged about the warranty back then when it was on a television commercial. I think you will get this taken care of 100%. Might have to get ugly with them but I think you will prevail because the car was stock with no alterations.
#40
Intermediate
Member Since: Dec 2005
Location: Los Angeles CA
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Why bother......
Granted, General Motors sells the Z06 for use at track days, and that is supposedly fully covered by warranty. But you may have over-revved the engine at the track and caused the damage yourself. Who knows?
My 2006 Z06 is modified to 640 hp with milled heads, cam and headers.
I have 7,000 miles and 3 track days on it and it has never broken. Including a missed 5th-2nd gear ( I was aiming for 4th) downshift at 120 mph that locked up the rear end and spun me off the track! It should have blown the engine. Once the dust settled I just put it back in 1st gear and rejoined the chase.
As cheap as the Chevy V-8 engine is to repair at a local speed shop, or possibly at the dealer, I'd fix it myself and move on. It's the cost of racing and playing with expensive Big Boy's toys.
Even if you did win in court against GM, the time and aggravation is not worth the $1,500 the repair might cost.
My 2006 Z06 is modified to 640 hp with milled heads, cam and headers.
I have 7,000 miles and 3 track days on it and it has never broken. Including a missed 5th-2nd gear ( I was aiming for 4th) downshift at 120 mph that locked up the rear end and spun me off the track! It should have blown the engine. Once the dust settled I just put it back in 1st gear and rejoined the chase.
As cheap as the Chevy V-8 engine is to repair at a local speed shop, or possibly at the dealer, I'd fix it myself and move on. It's the cost of racing and playing with expensive Big Boy's toys.
Even if you did win in court against GM, the time and aggravation is not worth the $1,500 the repair might cost.