[Z06] Took GM to court over dropped valve, and....
06-28-2011, 09:56 AM
#281
Honestly? I did not want to "push" the bank and get myself shut down completely. I had a very limited credit history. This car will beef that up and make a 3LZ a no-brainer loan if I choose to do that--or a '10 Viper.
As long as you run your keyboard instead of that Z when you've got some beers in you!
As long as you run your keyboard instead of that Z when you've got some beers in you!
06-28-2011, 10:17 AM
#282
Race Director
For those of us who have stayed stock and want to minimize the risk of valve guide wear, what can we do to accomplish that? Is there an oil additive or a particular brand that has an additive package that could help? Is there an upper cylinder lubricant that might provide additional lubrication between the guide and the valve stem? Is there anything else that you recommend? Thanks.
06-28-2011, 10:48 AM
#283
Premium Supporting Vendor
Jason,
For those of us who have stayed stock and want to minimize the risk of valve guide wear, what can we do to accomplish that? Is there an oil additive or a particular brand that has an additive package that could help? Is there an upper cylinder lubricant that might provide additional lubrication between the guide and the valve stem? Is there anything else that you recommend? Thanks.
For those of us who have stayed stock and want to minimize the risk of valve guide wear, what can we do to accomplish that? Is there an oil additive or a particular brand that has an additive package that could help? Is there an upper cylinder lubricant that might provide additional lubrication between the guide and the valve stem? Is there anything else that you recommend? Thanks.
06-28-2011, 04:30 PM
#285
Le Mans Master
Heres my story and tale of woe......
.......16 lifters replaced at 23,000 miles due to LOUD ticking......
.......then camshaft "wore out" (at 24,000) miles.......
Camshaft and NEW lifters (again) replaced..........
When I inquired why these things happened, I was told:
1. Use of Mobile 1, 5-30. GM speculation of not having the right additive package, hence a new oil developed and recommended for the newer Z06's.
2. Oil changed too often! (every 4,000 miles)
3. Camshaft not 'hardened" properly....
4. Car was not driven "hard" enough............
5. Lifters "wore the camshaft out"....
6. Normal, but let us "trade you" out of it if your not happy with our fixing of the problem.......for a new Z06!.......
The above reasons were given by GM technicians, Service advisors
and Managers of several GM Chevrolet dealerships on "why" my camshaft "failed".
HOWEVER, I still don't drive the urine out of it, never hit the rev limiter, and never floor it in 1st or "burn rubber"............so what am I doing wrong.
.......16 lifters replaced at 23,000 miles due to LOUD ticking......
.......then camshaft "wore out" (at 24,000) miles.......
Camshaft and NEW lifters (again) replaced..........
When I inquired why these things happened, I was told:
1. Use of Mobile 1, 5-30. GM speculation of not having the right additive package, hence a new oil developed and recommended for the newer Z06's.
2. Oil changed too often! (every 4,000 miles)
3. Camshaft not 'hardened" properly....
4. Car was not driven "hard" enough............
5. Lifters "wore the camshaft out"....
6. Normal, but let us "trade you" out of it if your not happy with our fixing of the problem.......for a new Z06!.......
The above reasons were given by GM technicians, Service advisors
and Managers of several GM Chevrolet dealerships on "why" my camshaft "failed".
HOWEVER, I still don't drive the urine out of it, never hit the rev limiter, and never floor it in 1st or "burn rubber"............so what am I doing wrong.
06-28-2011, 05:09 PM
#287
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If the problem looks like it could be related to heat soak, and thereby not enough oil flow to 'cool' the associated parts, why would I not use a full synthetic 0/5-40 or 0/5-60 for that matter?
Cold starting lubrication doesn't seem to be the problem, but I would suggest high temperature lubrication is what needs improving as well as switching out the faulty parts.
I for one also use ProMa MBL8 Oil Additive ( at the bottom of the page ) ** I dont work for, or have any financial interest in Pro-Ma, I just use the stuff **
http://www.promaperformanceproducts.com/lubricant.htm
I've used this combination in a number of high performance, high revving engines 8000rpm gear shifts etc....and its never skipped a beat.
Frankly, whats in the owners manual isn't stopping peoples engines from grenading themselves, and as much as I appreciate people are going to avoid putting in writing something which can be later used against them, or GM in court, those who are modding their engines and are going to be denied a warranty by GM anyway are more concerned with keeping their cars working.
Cold starting lubrication doesn't seem to be the problem, but I would suggest high temperature lubrication is what needs improving as well as switching out the faulty parts.
I for one also use ProMa MBL8 Oil Additive ( at the bottom of the page ) ** I dont work for, or have any financial interest in Pro-Ma, I just use the stuff **
http://www.promaperformanceproducts.com/lubricant.htm
I've used this combination in a number of high performance, high revving engines 8000rpm gear shifts etc....and its never skipped a beat.
Frankly, whats in the owners manual isn't stopping peoples engines from grenading themselves, and as much as I appreciate people are going to avoid putting in writing something which can be later used against them, or GM in court, those who are modding their engines and are going to be denied a warranty by GM anyway are more concerned with keeping their cars working.
Last edited by SteveRiellyNZ; 06-28-2011 at 06:39 PM.
06-28-2011, 05:11 PM
#288
Melting Slicks
thanks for posting that.
what was the point of Jason's reply..........
i am confused too.....
considering his knowledge base I think it might have been prudent for Jason to remain quiet on this string. The comment about no guide wear is appreciated......... but now we want more......... and Katech's relationship with the general won't permit it.........
what was the point of Jason's reply..........
i am confused too.....
considering his knowledge base I think it might have been prudent for Jason to remain quiet on this string. The comment about no guide wear is appreciated......... but now we want more......... and Katech's relationship with the general won't permit it.........
06-28-2011, 05:16 PM
#289
Le Mans Master
thanks for posting that.
what was the point of Jason's reply..........
i am confused too.....
considering his knowledge base I think it might have been prudent for Jason to remain quiet on this string. The comment about no guide wear is appreciated......... but now we want more......... and Katech's relationship with the general won't permit it.........
what was the point of Jason's reply..........
i am confused too.....
considering his knowledge base I think it might have been prudent for Jason to remain quiet on this string. The comment about no guide wear is appreciated......... but now we want more......... and Katech's relationship with the general won't permit it.........
06-28-2011, 05:32 PM
#290
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Many of the 'reasons' you've mentioned above are complete rubbish, which you well realize.
I'm sure if you drove the car hard, with redline shifts you would be accused of driving too hard...instead of currently not driving hard enough.
06-28-2011, 07:00 PM
#291
You know I don't know what to think....is this an isolated issue found in modded or tracked cars with aftermarket cams like Jason is suggesting (increased load) or is it a heat and lubrication issue like the op is suggesting (a defect in the ls7)? Basicaly from what I can discern from Jasons concise but short comments is that the op is responsible for his own misfortune and if he did nothing more than just track his car, it's just a one off defect in his particular engine. While I wish that were the case, that explanation leave too many unanswered questions for me to be satisfied. Jason what if the car has a stock camshaft...but has guide wear?
06-28-2011, 07:04 PM
#293
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I think that you will find there are many on this forum and thread that have stock cars, never been tracked, and having these exact issues.
You know I don't know what to think....is this an isolated issue found in modded or tracked cars with aftermarket cams like Jason is suggesting (increased load) or is it a heat and lubrication issue like the op is suggesting (a defect in the ls7)? Basicaly from what I can discern from Jasons concise but short comments is that the op is responsible for his own misfortune and if he did nothing more than just track his car, it's just a one off defect in his particular engine. While I wish that were the case, that explanation leave too many unanswered questions for me to be satisfied. Jason what if the car has a stock camshaft...but has guide wear?
06-28-2011, 07:11 PM
#294
Le Mans Master
06-28-2011, 07:20 PM
#295
Burning Brakes
Could the oiling problem on high g left turns have anything to do with this or be a contributing factor? I think GM did some stuff to 09's and higher (I think when the oil capacity was increased is when the issue was addressed...not sure if that was 09).
06-28-2011, 07:29 PM
#296
Team Owner
06-28-2011, 09:21 PM
#298
Le Mans Master
Just trying to figure out which used ones I "might" want to avoid.
I believe that is correct as well, but hopefully someone that "knows for sure" will chime in.
I think when the oil capacity was increased is when the issue was addressed...not sure if that was 09
06-28-2011, 09:24 PM
#299
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I believe that I was the one to mention "brand new" in my post. I don't know that hoefi ever did.
But when I said "new" I meant right off the showroom floor. Or a brand new crate motor, or just a brand new set of stock heads.
Perhaps someone has pulled the heads from a brand new Z06 or crate motor by now during other modifications, but perhaps until now, no one would have ever considered or thought to go so far as to then measure the valve guides.
But the fact is as 40YRW8 mentions, it's hard to talk about excessive "wear" without knowing where you started from in the first place.
It will be hard to find the "cause" until you are sure where you started from.
But when I said "new" I meant right off the showroom floor. Or a brand new crate motor, or just a brand new set of stock heads.
Perhaps someone has pulled the heads from a brand new Z06 or crate motor by now during other modifications, but perhaps until now, no one would have ever considered or thought to go so far as to then measure the valve guides.
But the fact is as 40YRW8 mentions, it's hard to talk about excessive "wear" without knowing where you started from in the first place.
It will be hard to find the "cause" until you are sure where you started from.
06-28-2011, 10:35 PM
#300
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This all really pisses me off. The minute I pick up a used cammed 07 with 7K miles on it, (now have almost 10K), I can't even drive to work without thinking that my car is gonna drop a valve now. Build date was 7/06 for an 07 model year. Now I gotta go spend another 4K on heads and rockers. So do I think that there is a greater than 1 in 4 chance that my engine will blow say before 100K miles? If so, I need to spend the money. 1 in 4 seems high, right?