So do I need to be scared of the LS7
08-06-2018, 03:49 PM
#61
Team Owner
08-06-2018, 04:08 PM
#62
Advanced
Not sure how many have seen this video but this guy properly fixed his z06, and diagnosed it. Seems to be a very real issue, and I do not believe that simply not tracking the vehicle is a solution, pretty sure it will drop even at idle if there is too much play in the valve
08-07-2018, 10:40 AM
#63
Drifting
Your statement that this issue impacts very few LS7s implies that we shouldn't have to worry about it. Maybe you didn't directly say it, but indirectly you did. But my comment wasn't directed just towards you, it was meant for everyone who doesn't believe it is an issue. You are free to express your opinion, but please don't tell anyone that they shouldn't be concerned about it.
My opinion is based on the information I've ascertained over the years and is not an endorsement for worrying or not worrying. The truth is the LS7 valve dropping issue is very muddy due to a few factors: (Making statistical analysis nearly impossible)
1. Cars having existing modifications prior to failure.
2. Some drivers early downshifting resulting in mechanical over rev.
3. The financial incentive for shops to find a failing result
4. Homemade wiggle tests that may not provide an accurate result
The only thing I have endorsed is carrying some form of powertrain warranty on these vehicles.
08-07-2018, 07:34 PM
#64
Le Mans Master
I'm stuck in between two worlds here. There's the forum world where every Z06 ever made is a ticking time bomb.
Then there's the real world where personally I know several Z06 owners running stock heads with no issues including my own. I have a warranty though so I'm not worried.
Then there's the real world where personally I know several Z06 owners running stock heads with no issues including my own. I have a warranty though so I'm not worried.
Perfect analogy - statistically, almost every human male born, assuming they don't die from another cause, will contract (and eventually) die from prostate cancer. Three ways that doesn't happen - 1. You get regular tests and checkups (wiggle test), and if something is found, you get treatment (VG repair), or 2. You don't live long enough (low mileage vehicle) for it to kill you, and 3. You luck out and are part of the small percentage of men that live to 100 and don't contract that type of cancer (lottery winner / gambler).
Honestly, the ONLY reason we waste time responding to these threads is when folks like yourself attempt to con nubies into a false sense of security, or convince them that GM's fairy tales are reality.
We know you are a lost cause - we are trying to prevent others from being victims.
Last edited by Dan_the_C5_Man; 08-07-2018 at 08:41 PM.
08-07-2018, 09:30 PM
#65
Drifting
You (and your buddy) most likely DO have an issue (excessive clearance), you just haven't experienced a failure yet.
Perfect analogy - statistically, almost every human male born, assuming they don't die from another cause, will contract (and eventually) die from prostate cancer. Three ways that doesn't happen - 1. You get regular tests and checkups (wiggle test), and if something is found, you get treatment (VG repair), or 2. You don't live long enough (low mileage vehicle) for it to kill you, and 3. You luck out and are part of the small percentage of men that live to 100 and don't contract that type of cancer (lottery winner / gambler).
Honestly, the ONLY reason we waste time responding to these threads is when folks like yourself attempt to con nubies into a false sense of security, or convince them that GM's fairy tales are reality.
We know you are a lost cause - we are trying to prevent others from being victims.
Perfect analogy - statistically, almost every human male born, assuming they don't die from another cause, will contract (and eventually) die from prostate cancer. Three ways that doesn't happen - 1. You get regular tests and checkups (wiggle test), and if something is found, you get treatment (VG repair), or 2. You don't live long enough (low mileage vehicle) for it to kill you, and 3. You luck out and are part of the small percentage of men that live to 100 and don't contract that type of cancer (lottery winner / gambler).
Honestly, the ONLY reason we waste time responding to these threads is when folks like yourself attempt to con nubies into a false sense of security, or convince them that GM's fairy tales are reality.
We know you are a lost cause - we are trying to prevent others from being victims.
I saved this post so I can have something to laugh at on slow days at the office.
Thanks!
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08-08-2018, 08:21 AM
#67
Team Owner
Member Since: Oct 2004
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St. Jude Donor '05
eems to be a very real issue, and I do not believe that simply not tracking the vehicle is a solution, pretty sure it will drop even at idle if there is too much play in the valve
Every year has its defects, may get hit may not so be proactive..its like saying "My wife would never cheat cause shes mine & havent caught her". Sure buddy.
Or the one thats driving on 20 yr old tires "but I only go 45 mph".
Last edited by cv67; 08-08-2018 at 08:24 AM.
08-09-2018, 02:07 PM
#68
Racer
Oh look everyone, it's *this* thread again.
OP just spend $4k to get the heads redone, then you won't have to worry about a ~$20k failure, mmmkay?
Now lock the thread please.
OP just spend $4k to get the heads redone, then you won't have to worry about a ~$20k failure, mmmkay?
Now lock the thread please.
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LV Vette (08-10-2018)
08-11-2018, 03:53 PM
#69
Pro
Priced right!
I have a chance to buy a 2009 Z06 with ~25K miles. As far as I can tell the car is stock, it is at a local Chevy dealer. It’s two owner, both owners had driven about equal miles. I really want a C6 Z06 but it seems the LS7 valve guide issue is all over the place. Some sites say they will blow the next time the car is started, others seem trouble free.
Help
Thanks Dave
Help
Thanks Dave
The point is, get a priced right auto and prepare to spend a few more thousand and do just the heads...and add a cam...and headers...and free flows....Just kidding! Do the heads and change the oil once in a while and you will have a wonderful "Chevy".
It's the best buy on the planet!
08-11-2018, 05:19 PM
#70
This. Or for even less cost you can have AHP take care of the heads for $1500( plus costs of head gaskets) and you and a buddy can have it taken care of in a weekend.
08-12-2018, 02:18 PM
#71
Melting Slicks
Originally Posted by Dan_the_C5_Man
Observed data doesn't need a formula to be true - I don't need a degree in astro physics to know that the sun will rise tomorrow, but knock yourself out to scan the hundreds of posts of information on hundreds of sets of heads and create your own, if that's what it takes to make a believer out of you.
BTW, the Earth is not flat, either.
BTW, the Earth is not flat, either.
08-14-2018, 08:50 AM
#73
Race Director
Member Since: Mar 2006
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Nah... he just came in here to stir everyone up... Prolly SOCAL's "Bro"...… He prolly just went and bought a Mustang 5.slow...