[Z06] Valve Springs
Instructor
Joined: May 2006
Posts: 194
Likes: 2
From: Worcester Mass
Just out of curiosity has anyone ever broken a replacement OEM LS6/LS2 spring (Part#12499224)? Im on the fence about changing mine, the rest of the valve train is stock, 22k miles but I do plan to autox the car. Just wondering if theres an equal chance of breaking a new spring or if thats never been reported.
Instructor
Joined: Apr 2006
Posts: 204
Likes: 0
From: Seattle
Just out of curiosity has anyone ever broken a replacement OEM LS6/LS2 spring (Part#12499224)? Im on the fence about changing mine, the rest of the valve train is stock, 22k miles but I do plan to autox the car. Just wondering if theres an equal chance of breaking a new spring or if thats never been reported.
my car has 21K orig. and I am changing out the springs with GM stockers when I get it out of storage this spring, I figure it cant hurt and the car sits a bunch so in that sense alone its probably a good idea to do them.
Peace, B.
Instructor
Joined: May 2006
Posts: 194
Likes: 2
From: Worcester Mass
I have not read any reports anywhere of it happening...now to be clear we are talking new stock GM replacement springs with a Stock cam.
my car has 21K orig. and I am changing out the springs with GM stockers when I get it out of storage this spring, I figure it cant hurt and the car sits a bunch so in that sense alone its probably a good idea to do them.
Peace, B.
my car has 21K orig. and I am changing out the springs with GM stockers when I get it out of storage this spring, I figure it cant hurt and the car sits a bunch so in that sense alone its probably a good idea to do them.
Peace, B.
Instructor
Joined: Apr 2010
Posts: 183
Likes: 0
From: San Jose CA
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Race Director
Joined: Sep 2006
Posts: 11,199
Likes: 1,139
From: Santa Rosa Beach FL
Got a problem w/a safety issue? File it w/NHTSA
Had everyone from day one filed a complaint w/NHTSA, this issue would have been on GM's tab, where it belongs.
btw: I just started a thread on filing complaints with the NHTSA. See C5 Discussion
Last edited by cor28vettes; Feb 18, 2011 at 11:55 PM.
Racer
Joined: Dec 2007
Posts: 444
Likes: 0
I'm in Afghanistan right now, and my car isn't being driven. It has around 45k miles and stock internals. I'm thinking when I get back, after having the car sit for 8 months it might be a good idea to get the old valve springs changed out.
So, just a regular set of GM LS2 springs will work to replace the stock LS6 springs?
So, just a regular set of GM LS2 springs will work to replace the stock LS6 springs?
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I'll be doing the full CompCams replacement as noted in this article:
http://www.carcraft.com/techarticles...ngs/index.html
http://www.carcraft.com/techarticles...ngs/index.html
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
I'm in Afghanistan right now, and my car isn't being driven. It has around 45k miles and stock internals. I'm thinking when I get back, after having the car sit for 8 months it might be a good idea to get the old valve springs changed out.
So, just a regular set of GM LS2 springs will work to replace the stock LS6 springs?
So, just a regular set of GM LS2 springs will work to replace the stock LS6 springs?
Last edited by David426; Mar 22, 2011 at 08:57 PM.
Thread Starter
Racer
Joined: Jan 2011
Posts: 301
Likes: 0
From: Canon City Colorado
Just thought I would add some pics of my valve spring swap I did not that long ago. I also included a picture of the tool that I used.
The swap was pretty easy for the most part. I also changed out all the plugs since I had to pull them anyway. I was very happy about how easy it was to access them compared to my 4th gen F-Body's that I owned in the past.
The swap was pretty easy for the most part. I also changed out all the plugs since I had to pull them anyway. I was very happy about how easy it was to access them compared to my 4th gen F-Body's that I owned in the past.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Actually- I was strongly leaning towards the PAC 1518's. But after my own exhaustive research on this forum - I concluded the 1518's were too much for the oem cam and valvetrain components.
I like the way the 1518's are designed - but I convinced myself the 1218's were better suited to run the stock Z06 valvetrain. This based on a lot of information from this forum .
I like the way the 1518's are designed - but I convinced myself the 1218's were better suited to run the stock Z06 valvetrain. This based on a lot of information from this forum .
PAC 1218:
http://www.racingsprings.com/Store/P...?ProductID=206
PAC 1518:
http://www.racingsprings.com/Store/P...?ProductID=220
From what I'm seeing, if you want the 1218 you might as well get the 1518 for a little more money to get the tougher more reliable spring.
The "tamer" spring is the PAC 1215 ... which has slightly less seat loads at the same lifts.
PAC 1215:
http://www.racingsprings.com/Store/P...?ProductID=205
I am running the 1518s... surprising how many people will comment on them, that are still on the factory cam and springs... 
anyway.. if you are sticking with the factory cam, you are correct just go with the 1218s, BUT understand, the closed seat pressure between the two is the same, 130#s (1.8" install height). The only measured difference are at loads of 1.2" @ 318#s for the the 1218s and 1.150" @ 337#s for the 1518s. Really not that much difference, but go with what you are comfortable with.
anyway.. if you are sticking with the factory cam, you are correct just go with the 1218s, BUT understand, the closed seat pressure between the two is the same, 130#s (1.8" install height). The only measured difference are at loads of 1.2" @ 318#s for the the 1218s and 1.150" @ 337#s for the 1518s. Really not that much difference, but go with what you are comfortable with.Last edited by ZeeOSix; May 15, 2011 at 12:57 AM.
