250kicker

I just had one break this weekend 2003 car made in 8/02

4drturbo

Mileage? Mods?

I just ordered:

660" LIFT PLATINUM SPRING KIT WITH STEEL RETAINERS SK001 S
http://www.briantooleyracing.com/660...s-sk001-s.html

LS CHROMOLY PUSHRODS 7.400" LONG .105" WALL
http://www.briantooleyracing.com/ls-...-105-wall.html

02 Z06. Car has 55k miles and the VIN is in the danger zone with the yellow springs. Car also has a ProCharger on it.

Only had the car for 2 weeks and not risking anything.

250kicker

2003 z06 build date 8/02 70,000 miles. last 6 of my vin**** 107257 only mod is air intake

Brock63

I am ordering my kit but hoping at 20,000 miles on my 2002 Z06 that I got time to wait until after Christmas with normal daily driving...no track or harsh treatment.?


Mine is 06/02 build date.

GenerationX1

I have 59k on my 02 but my build date is an early one @ 9/01. I haven't replaced mine yet either and that's not to say it still can't happen. I don't daily drive mine though either. I still plan on replacing mine also.

Dude.

I just had one go on me last week. 2004 Z06, stock, daily driven, 29K miles and built 11/16/2003. Springs were raw with orange stripe. Replacing with part number 12499224 along with all new valve seals.

Trash

Whether its track driven or daily driver doesn't matter. They've broken during all regimes. Some guys while idling, some getting on the freeway etc. That's what makes it difficult to predict. There's no correlation between use and failure. In fact some have occurred at low mileage, others high mileage.

Brock63

Mine are on order with some other things I am getting from my purchase deal of the C5Z... Son in law teaches automotive and has a brand new shop so will be able to do it all with the right equipment rather than in driveway or dark garage.

Brock63

exactly...you cant compare the numbers here with TOTAL vettes built in this grouping...you have to use at a random sampling of the forum group...and then expound that percentage to the TOTAL amount as a true estimation. So 3%-8% failure on forum...should also equate to 3-8% overall....sometimes it is far worse...sometimes it is far better...but in the end they average out as a snapshot in time and when using sampling.

For parts that are so reasonably priced for the new GM blue springs and intake/exhaust seals....and an engine that makes it fairly easy to complete the replacement without having to pull motor or anything to get to them all.....it is just prudent PREVENTIVE MAINTENANCE and well worth doing rather than rolling dice on the alternative damage to engine if it happens. Dont go out drinking beer one weekend with the buddies or skip a track day or hold off on the new can of Pinnacle Sovereign and take care of the springs.

Zo6kid 1499

Thanks for the info , just joined Forum tonight , found out that I'm in the danger zone. My 03 built in 7/02 !!! Thanks for the info , off to see Robby tomorrow.

jon boring

I had one break under normal driving conditions 2 years ago. Due to a new addition to the family, the repair was on the back burner for a long time. Just now getting around to replacing the engine with a GM performance LS376/480 crate motor. Engine swap was due to the piston grenading itself in the cylinder. The car is at the dealership, so I'll have to get the build date later, but I'm sure it's in the window. It's an 02 Z06 with 59000 miles on the clock. Only mod was a Vararam intake that came already installed on the car. Spring broke under mild acceleration while getting up to the speed limit on the interstate, no high revs at all. Really wish I had known about the spring issue, but I didn't, so now I'm paying the price. And that price is getting more expensive everyday! Hopefully I'll have everything together soon, though. I really miss driving her!

Corvette Maniac

Hi,
Remembered this topic, but never got to read through it...

My EB Z is build may 17th 2002, so in the "danger zone".
Has about 55k miles on it and so far no problems! I am the 5th owner as far as I know... Previous 2 I know a little, they're no racers... I drive it hard sometimes but no real racing either... 10k miles so far... These include several Autobahn miles

Will search for some replacement springs this winter and replace them coming spring when I take the car out of storage...
PAC 1218 is the way to go if I'm correct... no mayor mods in the future besides a vararam

azvrod

My 03 Z, Built Dec 2002, Springs are good (just verified)

4drturbo

Quoting myself. Had this installed for piece of mind back in October. Springs were completely fine. (yellow) I ended up selling them for $20 too hahaha.

jakdeefl

# 3 intake broken spring slow speed cruising 16120 miles on a 03 Z06 wish I saw all of this first guess i should of looked.....

GM350Z

wow, very impressive. Nice job

McFly09

I'm about to have my valve spring replaced with new LS2/LS3 springs.

Henderson Performance in New Braunfels, TX recommended those for OEM replacements and Comp Cams 26918 as an upgrade.

This is strictly preventative on a bone stock car, 15k miles. I'm not ever planning to swap out the cam so I'm thinking of just going with the new OEM LS2/LS3 spring.

I just wanted to throw that out there and see how that sounds to you guys.

Regards

wildwall

It's ironic that new plugs and wires cost more than the gm springs and seals!

Kathomps71

Just to make sure I am interpreting the VINs right. I am looking at an '04 but has the last 5 of 20724. Did they start over on the last 4 digits for the '04 year because just looking at your graph and based on my VIN number, it looks like I should be in the danger zone with the '02 models.

GM350Z

Negatory, if I remember correctly, the spring problem is basically non-existent in 01 and 04's.