Go Back  CorvetteForum - Chevrolet Corvette Forum Discussion > C5 Corvettes, 1997 - 2004 > C5 General
Reload this Page >

[Z06] ***Build Date/VIN Analysis of LS6 Valve Spring Failures***

Notices
C5 General General C5 Corvette and C5 Z06 Discussion not covered in Tech
Sponsored by:
Sponsored by:

[Z06] ***Build Date/VIN Analysis of LS6 Valve Spring Failures***

 
Old 06-08-2012, 09:13 AM
  #21  
RANsTRZ06
Junior Member
 
Member Since: Jun 2012
Location: Copley Ohio
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
Default

I had on fail at about 45000 mile on a stock motor 2004. It took out the block.
RANsTRZ06 is offline  
Old 06-08-2012, 10:02 PM
  #22  
Xx_Black-out
CF Senior Member
 
Xx_Black-out's Avatar
 
Member Since: Jun 2007
Location: @ work in South Carolina
Posts: 2,434
Received 14 Likes on 7 Posts
St. Jude Donor '08-'11-'12
Default

Just found the VIN, as I had sold that car a while back. You can update the info if you would like:

2002 Z06
Built March 11, 2002
1G1YY12SX25124999
Intake spring (YELLOW) broke on cyl. 7 broke at 130000mi
Xx_Black-out is offline  
Old 06-10-2012, 10:39 AM
  #23  
skyavonee
CF Senior Member
Thread Starter
 
skyavonee's Avatar
 
Member Since: Jul 2010
Location: Los Angeles
Posts: 3,129
Received 38 Likes on 25 Posts
Default

Originally Posted by RANsTRZ06 View Post
I had on fail at about 45000 mile on a stock motor 2004. It took out the block.
Originally Posted by Xx_Black-out View Post
Just found the VIN, as I had sold that car a while back. You can update the info if you would like:
skyavonee is offline  
Old 06-10-2012, 10:29 PM
  #24  
dart.deanda
CF Senior Member
 
Member Since: May 2012
Location: las vegas nevada
Posts: 257
Received 11 Likes on 10 Posts
Default

Big thanks for compiling the data. I posted in the original thread regarding the damage. Substantive. Anyone know if I can remove the piston by taking off the oil pan, cap and pushing the rod and piston out of the top? Just trying to avoid pulling the motor.
dart.deanda is offline  
Old 06-14-2012, 10:23 PM
  #25  
skyavonee
CF Senior Member
Thread Starter
 
skyavonee's Avatar
 
Member Since: Jul 2010
Location: Los Angeles
Posts: 3,129
Received 38 Likes on 25 Posts
Default

I've updated the plots on the first page to reflect the latest data. The statistics have changed a little, but the general conclusions remain the same.

Current count is 132 broken springs, and 44 build dates.
skyavonee is offline  
Old 06-15-2012, 02:24 PM
  #26  
Black 02
CF Senior Member
 
Member Since: Apr 2011
Location: Houston TX
Posts: 4,251
Received 413 Likes on 305 Posts
Default

Originally Posted by skyavonee View Post
I've updated the plots on the first page to reflect the latest data. The statistics have changed a little, but the general conclusions remain the same.

Current count is 132 broken springs, and 44 build dates.
Thank you for putting this together. From my vin #, a vin breakdown site I found showed my car as being built on January 31st. I would say this makes me an honorary member of the "danger zone" group and makes me wonder if the other cars from my category were also built in late January.
Black 02 is offline  
Old 06-15-2012, 05:34 PM
  #27  
ZeeOSix
CF Senior Member
 
ZeeOSix's Avatar
 
Member Since: Mar 2002
Location: F22 Raptor Country
Posts: 5,704
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by skyavonee View Post
Current count is 132 broken springs, and 44 build dates.
And just think ... only a small percentage of owners hang out on this chat board, so how many have failed that we will never know about. The spring failure rate is way higher than what these stats show. It's an epidemic IMO.
ZeeOSix is offline  
Old 06-15-2012, 06:05 PM
  #28  
mattzoom
CF Member
 
mattzoom's Avatar
 
Member Since: Jul 2010
Posts: 78
Likes: 0
Received 0 Likes on 0 Posts
Default

yay

Name:  photo-94.jpg
Views: 2120
Size:  104.5 KB
mattzoom is offline  
Old 06-15-2012, 06:55 PM
  #29  
thechosenone
CF Senior Member
 
Member Since: Apr 2010
Posts: 3,203
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by mattzoom View Post
yay

Good idea.
thechosenone is offline  
Old 06-15-2012, 07:43 PM
  #30  
Black 02
CF Senior Member
 
Member Since: Apr 2011
Location: Houston TX
Posts: 4,251
Received 413 Likes on 305 Posts
Default

Originally Posted by ZeeOSix View Post
And just think ... only a small percentage of owners hang out on this chat board, so how many have failed that we will never know about. The spring failure rate is way higher than what these stats show. It's an epidemic IMO.
Not to mention all the ones that were uninstalled when cars were cammed early in life. Those springs never had a chance to fail unless they were reinstalled in another lsx based vehicle.
Black 02 is offline  
Old 06-15-2012, 11:05 PM
  #31  
skyavonee
CF Senior Member
Thread Starter
 
skyavonee's Avatar
 
Member Since: Jul 2010
Location: Los Angeles
Posts: 3,129
Received 38 Likes on 25 Posts
Default

Originally Posted by ZeeOSix View Post
And just think ... only a small percentage of owners hang out on this chat board, so how many have failed that we will never know about. The spring failure rate is way higher than what these stats show.
- which is why my likelihood graph is given in relative terms among the groups, instead of as absolute probabilities.
skyavonee is offline  
Old 06-15-2012, 11:19 PM
  #32  
skyavonee
CF Senior Member
Thread Starter
 
skyavonee's Avatar
 
Member Since: Jul 2010
Location: Los Angeles
Posts: 3,129
Received 38 Likes on 25 Posts
Default

Originally Posted by Black 02 View Post
Thank you for putting this together. From my vin #, a vin breakdown site I found showed my car as being built on January 31st. I would say this makes me an honorary member of the "danger zone" group and makes me wonder if the other cars from my category were also built in late January.
Yours is actually the only one I have on record from January. But you're probably right about being an honorary member of the danger zone. Breaking up the data into months, although helpful, is really kinda arbitrary. Ideally, I'd have VIN info on all the failures so I could more precisely group the different risk levels. But there are quite a few springs that I have build month info on but not VIN, so I used what I had.
skyavonee is offline  
Old 06-18-2012, 11:27 AM
  #33  
MikeD33
Junior Member
 
Member Since: Jun 2012
Location: Sierra Vista AZ
Posts: 24
Likes: 0
Received 1 Like on 1 Post
Default

I will add another one for you later after I swing by the shop and get the build date and VIN. Mine was 60k miles #5 failed and cracked the block around the lifter socket and made it a nice oblong shape.
MikeD33 is offline  
Old 06-29-2012, 11:54 PM
  #34  
skyavonee
CF Senior Member
Thread Starter
 
skyavonee's Avatar
 
Member Since: Jul 2010
Location: Los Angeles
Posts: 3,129
Received 38 Likes on 25 Posts
Default

Current numbers are 133 failures and 48 build dates. A duplicate was found in the 2004 models, so they're back down to 5 total, again equaling the 2001's. The charts have been updated to reflect the latest info.
skyavonee is offline  
Old 07-02-2012, 07:43 PM
  #35  
varkwso
CF Senior Member
 
varkwso's Avatar
 
Member Since: Oct 2002
Location: Grovetown GA
Posts: 6,855
Likes: 0
Received 1 Like on 1 Post
Default

I broke a spring on my 2002 Z06. Somewhere around 60k miles. Most of them on track. I bought it new 15 Sep 01 so it is an early production 02 model. I ran it hard so not surprised it failed. Did not take out motor. It broke on I 20 near Columbia SC at 60 mph on cruise control. Took a while to sort problem out.
varkwso is offline  
Old 07-04-2012, 01:36 PM
  #36  
Chinookmtp
Junior Member
 
Chinookmtp's Avatar
 
Member Since: Jan 2012
Location: New Market, AL
Posts: 26
Likes: 0
Received 0 Likes on 0 Posts
Default

Finally finished changing my springs in my 2002 Z06 last weekend. Had ordered the wrong valve spring compressor and wasn't able to get to the #7 and 8 changed out. Used the Trick Flow Specialties TFS-90306 compressor worked great. Accidently ordered the 90307 which doesn't fit the LS6....at least it's done and I fell better about it.http://www.summitracing.com/parts/TFS-90306/
old springs were yellow new ones blue...
Chinookmtp is offline  
Old 07-11-2012, 02:29 PM
  #37  
joopblog
CF Member
 
joopblog's Avatar
 
Member Since: Jul 2006
Location: Roseville CA
Posts: 75
Likes: 0
Received 0 Likes on 0 Posts
Default

I wonder what the failure rate is, in comparison to c4's or c6's? Maybe this failure rate isn't higher than normal, just wondering.
joopblog is offline  
Old 07-11-2012, 03:14 PM
  #38  
RC000E
CF Senior Member
 
Member Since: Sep 2009
Location: My interests are mobile
Posts: 6,941
Received 333 Likes on 202 Posts
Default

Great work on this man! I inform guys all the time about this, but even shop owners who work exclusively on Corvettes say they never heard of such a thing. I just look at them in amazement.

Lucky for me, I won't be on this list. I have a 56k mile 2002 Z06 and just changed mine, as a preventative measure, when I did my supercharger. Now I don't even think about it. I used to start my car sweating almost...haha.
RC000E is offline  
Old 07-14-2012, 07:34 AM
  #39  
Z06TWT
CF Senior Member
Support Corvetteforum!
 
Member Since: Apr 2012
Location: Marietta Ga
Posts: 276
Likes: 0
Received 1 Like on 1 Post
Default

Crap, my 02 was built in April and the VIN is 28868 (Danger Zone) . I bought the car several months back and have been tracking it ever since. It would be helpful if CF members would post the type/brand of springs used to fix the problem along with the parts/labor costs. Once again GREAT work on this subject!
Z06TWT is offline  
Old 07-14-2012, 10:44 AM
  #40  
MY03C5Z
CF Senior Member
 
MY03C5Z's Avatar
 
Member Since: May 2004
Location: Trump 2020 🇱🇷 Keep America Great!
Posts: 5,916
Received 85 Likes on 71 Posts
Default

You can find all the part numbers in Steve's other valve spring post. I went with stock LS2 (blue) springs in mine recently.
MY03C5Z is online now  

Thread Tools
Search this Thread
Quick Reply: [Z06] ***Build Date/VIN Analysis of LS6 Valve Spring Failures***


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: