boss302

My understanding from this forum is that /02s and early /03s are the cars with valve spring failures. Do we know what "early" is? Would that be the first 4 months of production starting in July /02? I am going to be looking at an /03 in the spring and am hoping to get a definitive answer to this, but if the car looks good (don't know the build date yet), I will probably buy it and just change the damn springs for peace of mind. It's too bad GM won't step up and admit they had a run of bad springs, and let us know the serial numbers of the cars that are at risk.

zeevette

Another nice thing about later '03s, is they switched to steel shift forks instead of aluminum, but I don't know exactly when either update took place. GL.

Zo3o6

Looking for an answer to this also! My build date is March 03.
77,000 miles to date, no issues.

Badd LS6

i have an 04Z and just had a exhaust valve spring bust on me this past summer

David426

02-04 model LS6 have a 3% chance of spring failure failure

Psiadd1ct

so there is no specific dates?... i have a 2002 z06 with 11k, and how does this happen? is there a way to know or fix this, is it the heat at idle ect or what?...maybe lower thermostat lol, cause i heard most of these happen at idle...so is it deffinite that every 2002 z06 has the issuse...cause thats a damn big issue and expensive im sure (how much for install of them?)..but maybe mine was alrdy fixed who knows!?

c6z06forme10

Easy fix. You should just save for some valve springs before doing any other mods. If you don't, you'll always have the thought in the back of your mind. it's also and EASY DIY..

Psiadd1ct

whats DIY? hehe....and how much does the install cost?

c6z06forme10

DIY= do it yourself..

Give ECS in new jersey a call and find out how much something like that should run. Shouldn't be too much

NatB

Is the 3 percent failure verifiable? If so- seems negligeable enough to make the replacement of springs potentially a higher risk ( murphy's law).

PS- Read your related post- I see your basis.

Psiadd1ct

ya right valve springs no way DIY lol..im good without outside the motor...but not good without taking a motor out and going into it lmao.

c6z06forme10

You'd be surprised what you're capable of when you're short on cash and really want something done..

dieseldave56

david please don't make statemets like that unless you can quote your source(s).

If your % is correct , that works out to 508 LS6 engines are at risk .

Does that include both intake and exhaust springs ? And did those 508 LS6es get all "bad" springs or just one or a couple springs? If you are not definitive folks here will misunderstand and then 'wild' exaggerations suddenly spread thru out the CF community. I just want statements of facts , if not nip it, nip it in the bud before the market valve drops out on the 2002-2003 Z06es .

81c3

You dont need to remove the engine. Its a very easy job to do right in the garage with only a couple special hand tools. People here can help you. I did mine for $325. with the special tools included in the price. I did a write up on the procedure, but its stored in my laptop. I can link it if you want.

David426

LG Motorsports, Corvettes of Dallas, 21st Century Muscle cars, Huffines Chevrolet are my sources.. I'm personal friends with Keith Overturf (Service Tech) and Larry the shop Foreman at Huffines Chevrolet.. 21st Century I spoke to the Owner John Page.. Sean at Corvettes of Dallas and Anthony at LG.. Results were from never heard of a broken spring all the way to very very rare. 2-3% failure is a good ballpark figure

Xx_Black-out

I have an 02 and I finally had an intake spring break on cyl. 7 at 130000mi

acarroll7715

mine will be getting replaced with Lunati Gold duals this weekend. Along with a new cam....

c6z06forme10

Psiadd1ct

was any of the valve springs covered under warrenty...just wondering if maybe they were already fixed, and if you had a shop do the valve springs, how much (ball park) would they charge? cause if its the same as a cam install damnnnn lol, cam install im waiting on because you need so much more stuff then just the cam itself(anyone live near Deerfield NH...lol

Chris Stewart

Still waiting for my stockers to fail.