[Z06] LS7 Engine problems
#2
Boy, one motor goes bad with a visable case and now we forget like the last 2.5 years of cars ever existed or proven they dont go pop left and right.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
#5
Le Mans Master
#7
Safety Car
Boy, one motor goes bad with a visable case and now we forget like the last 2.5 years of cars ever existed or proven they dont go pop left and right.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
#8
Le Mans Master
been here a long time and since the cars hit the streets, i can recall about 12-15 blown LS7's reported on this board. some let go on a leasurely drive, some at the track. so by my count, 12-15 engines since sep 2005
#9
Burning Brakes
My 06 Z06 went past 18,000 miles while at Thunder Hill last week. Nearly 9000 of these miles have been on tracks all over Northern California and Nevada. This car has been driven hard from the minute I wrote the check and it has never whimpered.
I wore out the stock brakes and replaced them with Baer S6 front and rear. These brakes are absolutely incredible!!
Oh.... and lots of tires have been shreded!!
Dave
I wore out the stock brakes and replaced them with Baer S6 front and rear. These brakes are absolutely incredible!!
Oh.... and lots of tires have been shreded!!
Dave
#10
I would think GM looked hard at the components mentioned. I had two LS6’s let go with broken valve springs, one @ 22,000 miles and one @ 55 thousand miles. 14k on the LS7 so far. It really burns much less oil that the LS6 and LS2s I owned and ruins a lot cooler oil temps. We are their ultimate test mules.
Doc E.
Doc E.
#11
Boy, one motor goes bad with a visable case and now we forget like the last 2.5 years of cars ever existed or proven they dont go pop left and right.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
Sorry, you may really be curious, but you then again maybe not. I just am blown away how one thread has the sky falling.
FWIW I am a GM critic with some obviously questionable decisions they make to save a few bucks, but this stuff is about as wearing as the JSB threads.
If i rained tomorrow I wouldn't start building an ark.
#13
I'm just curious what is failing on them. I mentioned in another post, the person doing the assembly is the least likely cause. Though humans can goof up. I would first blame the origin of the parts involved.
I would like to know from the builders that frequent this site what kind of checks they are doing in the process? Do the parts come to you in a tray and you just put it together or are there certain checks that are done other than fastener torques?
I would like to know from the builders that frequent this site what kind of checks they are doing in the process? Do the parts come to you in a tray and you just put it together or are there certain checks that are done other than fastener torques?
#14
Not many are failing, and it's nothing in particular. There is usually no pattern to random failure modes, just as in all things mechanical on all cars.
It is also important to remember the comparison set. You can't compare a LS7 to a Civic engine failure rate. The more power you put out, the less reliable the engine will be. That is a truism. Nonetheless, even that difference is rather small, percentage-wise. Add to that the type of owner who buys a high performance car and how they tend to drive them as opposed to the average Civic owner.
In addition, when you're dealing with performance engines, a lot of people can't resist the urge to tune and otherwise modify them. Thus, it becomes pretty impossible, pretty quickly to lock in on causal factors, that are due to stock design and production issues vs. self-imposed mods beyond the stock design, and driver behavior. This is especially true in an internet enthusiast's forum, which is not representative of the general population of owners.
So you see, what you have here is a hopelessly and completely, confounded, scientific sample within which it is impossible to draw general conclusions within the overall population of engines in general.
It is also important to remember the comparison set. You can't compare a LS7 to a Civic engine failure rate. The more power you put out, the less reliable the engine will be. That is a truism. Nonetheless, even that difference is rather small, percentage-wise. Add to that the type of owner who buys a high performance car and how they tend to drive them as opposed to the average Civic owner.
In addition, when you're dealing with performance engines, a lot of people can't resist the urge to tune and otherwise modify them. Thus, it becomes pretty impossible, pretty quickly to lock in on causal factors, that are due to stock design and production issues vs. self-imposed mods beyond the stock design, and driver behavior. This is especially true in an internet enthusiast's forum, which is not representative of the general population of owners.
So you see, what you have here is a hopelessly and completely, confounded, scientific sample within which it is impossible to draw general conclusions within the overall population of engines in general.
Last edited by Foosh; 10-31-2007 at 11:27 PM.
#16
Drifting
do yourself a favor and don't ask that question. All kinds of self proclaimed scientists will come out of the wood work without factual data to support there kool-aid drinking theories even though members have posted problems.
Last edited by CodeBlack; 11-01-2007 at 05:28 PM.
#17
Drifting
#18
Burning Brakes
I get a feeling some people here try to justify their 70k purchase that broke by saying "all cars have problems." I've been around high horsepower cars a long time and understand all of the nuances that come with them; but outright failure is a different issue all together. The pushrod motor has been around since the 50's, we should have rod, springs, and rocker arms figured out by now. It would be nice to know what the real MTBF for the Z is as it relates to the motor itself. I would also like to know the real number of Z06 owners on this board and how many have had total motor failure at < 20000 miles. If all Z owners (~12000?) visit this board then 15 total failures is a small percentage. If there are only 200 Z members on this board, then 15 failures is a very big deal at 7.5%.
#20
Melting Slicks
Member Since: Jul 2006
Location: Kansas
Posts: 2,032
Likes: 0
Received 0 Likes
on
0 Posts
I get a feeling some people here try to justify their 70k purchase that broke by saying "all cars have problems." I've been around high horsepower cars a long time and understand all of the nuances that come with them; but outright failure is a different issue all together. The pushrod motor has been around since the 50's, we should have rod, springs, and rocker arms figured out by now. It would be nice to know what the real MTBF for the Z is as it relates to the motor itself. I would also like to know the real number of Z06 owners on this board and how many have had total motor failure at < 20000 miles. If all Z owners (~12000?) visit this board then 15 total failures is a small percentage. If there are only 200 Z members on this board, then 15 failures is a very big deal at 7.5%.
By the way....10,500 miles and running EXTREMELY strong...