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Corvettes of Auburn (a very respected shop up here) recommends replacing the Trunions also. They only use Lil John Motorsports Springs and Trunions and have never had a failure.
Corvettes of Auburn (a very respected shop up here) recommends replacing the Trunions also. They only use Lil John Motorsports Springs and Trunions and have never had a failure.
That depends on the usage of the vehicle. If the car is ran hard regularly or tracked then upgrading is recommended.
However all of these vendors are using the same spring manufacturer who brand labels for each of them. Running the springs you are referring to is most likely a double spring. Again this is not really necessary unless the camshaft has been changed.
A single behive spring with the stock cam is sufficient in controlling the lightweight valves on the LS6 platform.
I have been struggling to find the answer: my 2003 Z06 has bare metal or silver valve springs (no colored stripes as far as I could tell); would that mean they were replaced by a previous owner? Were all stock 03 z06 valve springs yellow in color?
My 2003 was built in spring 2003, March I believe. How do I safely remove the oil fill tube that goes into the valve cover so I can see what color mine are?
My 2003 was built in spring 2003, March I believe. How do I safely remove the oil fill tube that goes into the valve cover so I can see what color mine are?
I don't know if the fill tube comes off or not. Mine was pretty tight and I didn't want to chance breaking it. I was able to see the color of one spring (yellow) on my '02 by looking in with a strong flashlight. If you have one of the little round mirrors on a telescoping handle that may help to see more.
Good luck!
Just ATE a valve, downshifted to 3rd at about 45 on an off ramp, rev matched...no big deal...wasnt even 4,500rpm I dont think....
Never heard any bang or clanking or grinding...just got what felt like a minor misfire, car still running relatively smooth...just surging power on and off, and a put put sound (like a dead cylinder). NEVER got a check engine light. Has pending codes for MAF performance and Evap system...thats all.
This car had suffered a spring failure when brand new (first owner before I got it) and was repaired by GM under warranty.
Spring broken in half. Valve is missing, can see a hole in the piston. Only 1 of the springs on the car is bright yellow, the rest are unpainted?
I think the 1 yellow spring is what GM replaced (cheap bastards only did 1 spring??) The spring that broke is right next to that 1 yellow spring.
Last edited by jabara572; 07-31-2017 at 11:15 AM.
Reason: added mileage
Just ATE a valve, downshifted to 3rd at about 45 on an off ramp, rev matched...no big deal...wasnt even 4,500rpm I dont think....
Never heard any bang or clanking or grinding...just got what felt like a minor misfire, car still running relatively smooth...just surging power on and off, and a put put sound (like a dead cylinder). NEVER got a check engine light. Has pending codes for MAF performance and Evap system...thats all.
This car had suffered a spring failure when brand new (first owner before I got it) and was repaired by GM under warranty.
Spring broken in half. Valve is missing, can see a hole in the piston. Only 1 of the springs on the car is bright yellow, the rest are unpainted?
I think the 1 yellow spring is what GM replaced (cheap bastards only did 1 spring??) The spring that broke is right next to that 1 yellow spring.
I had 3 break on the same car, first one, and when that one broke, another was found improperly replaced with a LS1 spring from the previous owner. Then I was too cheap to replace all of them at that moment, and a 3rd broke and took out a piston a thousand or so miles later. Thank god I moved on to the LS7 which has no valve issues (jk, they're even worse...). Corvettes, so fun! (to work on...) But I still love 'em!!!
I put an endoscope camera down my oil fill neck, and noticed that the valve springs are yellow.
It's a 2002 Z06 (in the highest risk group/danger zone based on the data) I very recently bought, with 57k miles. I read in some other threads (granted, they were very old threads from around 2007) that some of the "upgraded" springs are yellow and made in Germany and/or are Ls2 springs (ie. not all the upgraded springs are necessarily blue). Is there a way to tell, besides the color, whether the springs are stock or upgraded? Are there stampings on them (or other ways to tell) if I pull the valve covers?
Last edited by ArmchairArchitect; 08-30-2017 at 11:18 AM.
I put an endoscope camera down my oil fill neck, and noticed that the valve springs are yellow.
It's a 2002 Z06 (in the highest risk group/danger zone based on the data) I very recently bought, with 57k miles. I read in some other threads (granted, they were very old threads from around 2007) that some of the "upgraded" springs are yellow and made in Germany and/or are Ls2 springs (ie. not all the upgraded springs are necessarily blue). Is there a way to tell, besides the color, whether the springs are stock or upgraded? Are there stampings on them (or other ways to tell) if I pull the valve covers?
I swapped my stock yellow's out for blue LS2's and I have a 2002 Z06. There is no stamp, markings or anything on them just color. If I were you, I wouldn't roll the dice. I would change them out, it's really cheap and easy to swap the old ones out for stock blue LS2 springs. It made me sleep good at night knowing I could beat on it like it was originally intended for
I put an endoscope camera down my oil fill neck, and noticed that the valve springs are yellow.
It's a 2002 Z06 (in the highest risk group/danger zone based on the data) I very recently bought, with 57k miles. I read in some other threads (granted, they were very old threads from around 2007) that some of the "upgraded" springs are yellow and made in Germany and/or are Ls2 springs (ie. not all the upgraded springs are necessarily blue). Is there a way to tell, besides the color, whether the springs are stock or upgraded? Are there stampings on them (or other ways to tell) if I pull the valve covers?
Regarding the spring color that is true. I've seen new LS-6 springs that were yellow as late as 2011. You likely have the original yellow. MOST new springs are blue, but not all.
There are no stampings or other marks. Any stamping or mark would leave a material discontinuity and cause a failure point.
It would likely be best to simply swap out your existing springs for new ones. If you can do the job yourself it is super cheap.
02-01-2017, 07:54 PM
