Notices
C6 Corvette ZR1 & Z06 General info about GMs Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track Advertisement
View Poll Results: My engine required internal repair or replacement within X miles:
10k
22.22%
20k
19.44%
30k
22.22%
40k
19.44%
50k
0
0%
60k
2.78%
70k
2.78%
80k
2.78%
90k
2.78%
100k
0
0%
110k
2.78%
120k
0
0%
130k
2.78%
140k
0
0%
150k
0
0%
more (post details)
0
0%
Voters: 36. You may not vote on this poll

[Z06] mileage before LS7 engine failure stock

 
Old 01-20-2019, 01:42 PM
  #1  
bjmsam
CF Senior Member
Thread Starter
 
bjmsam's Avatar
 
Member Since: May 2014
Location: Mount Airy MD
Posts: 569
Thanked 35 Times in 30 Posts
Default mileage before LS7 engine failure stock

Within what mileage did your stock LS7 engine require internal repair or replacement? No "fixed" heads, aftermarket cam, adjusted tune, etc.
This includes wiped cam lobe, failed lifter, bent rod, spun bearing, valve that actually dropped, etc.
This does not include valve to guide clearances measuring beyond service limits (post that info in The "Out of Spec" Guide Wear Registry thread).

Please vote and post details in this thread with followup discussion in other threads to keep this one clean. Thank you!
bjmsam is offline  
Old 01-22-2019, 10:51 AM
  #2  
Mr. Jean
CF Senior Member
 
Mr. Jean's Avatar
 
Member Since: Dec 2006
Location: Sparks Nevada
Posts: 3,036
Thanked 33 Times in 30 Posts
Default

Mine is a stock 2009 Z06 with a GMPP in place, with 26,871 miles. It started making noises here in Reno, so I had Champion Chevrolet check it out and it had a bad cam and lifter.
Since it had to come apart and knowing of the head issues these LS7's are having, I requested that I see the heads and they be checked while apart.

As expected the guides were shot, with excessive play in the valve guides and needed replacement.
After inspection and approval by GMPP, they replaced the heads with an all new set, along with cam, lifters and associated parts.
I had them put in new spark plugs while at it at no extra labor charge, just the cost of the plugs.

All said and done, it cost me $381.95 out the door, for my deductible and the spark plugs.
The GMPP paid $10,127.88. It would have cost me $10,509.83 total in expenses, had I not had the GMPP, sure glad I had it.

Last edited by Mr. Jean; 01-22-2019 at 10:53 AM.
Mr. Jean is offline  
The Following 2 Users Say Thank You to Mr. Jean For This Useful Post:
bjmsam (01-22-2019), gregm06 (02-18-2019)
Old 01-22-2019, 12:08 PM
  #3  
Ryan95i4
Junior Member
 
Ryan95i4's Avatar
 
Member Since: Apr 2009
Posts: 37
Thanked 2 Times in 2 Posts
Default

2006 Z06, 2 rods galled and motor siezed 3rd or 4th day after I bought the car. 78K miles.

Block/liners did not crack, currently rebuilding with forged bottom end. Got lucky, must have been in neutral when it actually seized. On teardown, found cam and lifter damage as well.

Heads were sent off at same time, and although all guide clearances were within spec, two intake and two exhaust valves were just below service limits.

Last edited by Ryan95i4; 01-23-2019 at 10:30 AM.
Ryan95i4 is offline  
The Following User Says Thank You to Ryan95i4 For This Useful Post:
bjmsam (01-22-2019)
Old 01-22-2019, 02:40 PM
  #4  
moose.b3
CF Senior Member
 
moose.b3's Avatar
 
Member Since: Nov 2006
Location: Sierra Mtns. The Great State Of Jefferson
Posts: 1,504
Thanked 81 Times in 73 Posts
Default

Originally Posted by Mr. Jean View Post
Mine is a stock 2009 Z06 with a GMPP in place, with 26,871 miles. It started making noises here in Reno, so I had Champion Chevrolet check it out and it had a bad cam and lifter.
Since it had to come apart and knowing of the head issues these LS7's are having, I requested that I see the heads and they be checked while apart.

As expected the guides were shot, with excessive play in the valve guides and needed replacement.
After inspection and approval by GMPP, they replaced the heads with an all new set, along with cam, lifters and associated parts.
I had them put in new spark plugs while at it at no extra labor charge, just the cost of the plugs.

All said and done, it cost me $381.95 out the door, for my deductible and the spark plugs.
The GMPP paid $10,127.88. It would have cost me $10,509.83 total in expenses, had I not had the GMPP, sure glad I had it.

I hope you had the heads fixed before they were installed and didn't just put on new GM heads. My new GM heads lasted 20,000 miles and needed replaced again because of bad guides. This last time the heads were sent to AHP and GMPP paid to have them fixed.
moose.b3 is offline  
Old 01-22-2019, 03:07 PM
  #5  
Mr. Jean
CF Senior Member
 
Mr. Jean's Avatar
 
Member Since: Dec 2006
Location: Sparks Nevada
Posts: 3,036
Thanked 33 Times in 30 Posts
Default

Nope, I was stuck with Champion Chevrolet in Reno and GM wanted the old heads sent to them and they sent me new ones.
I'm in Sparks, Nevada and the noise came on sudden and I wasn't going to drive or trailer it to AHP in So. Cal.
I was planning on having them checked before my GMPP expired and get things done with AHP then, but crap hit the fan before that, with the cam and lifters.

PS I'm ready to turn 76 in a month and I've only put 1,600 miles on it in the 1 1/2 years since it happened. So in reality I'll probably only put another 7-10K miles on it myself anyway. By then I'll probably be ready to sell it. Time will tell.

Edit: 11 people have voted, but only 3 have posted what happened. I'm hoping for more posts, to see the causes and timing of the events.
Let's post it up guys.

Last edited by Mr. Jean; 01-22-2019 at 03:40 PM.
Mr. Jean is offline  
Old 01-22-2019, 03:18 PM
  #6  
NAH801
Junior Member
 
Member Since: May 2016
Location: Hill AFB, UT
Posts: 40
Thanked 9 Times in 9 Posts
Default

Somewhat similar situation to Ryan95i4,

Purchased the car in Feb 18 with 74k miles on it. By the end of Mar 18 the engine seized on a wot pull @ 7k rpm @ 76k miles. Had 6 bad rods and 3 trashed bearings. Rebuilt with a forged bottom end, btr3 cam, and had a local shop repair all the guides.
NAH801 is offline  
The Following User Says Thank You to NAH801 For This Useful Post:
bjmsam (01-22-2019)
Old 01-22-2019, 04:20 PM
  #7  
philadd
CF Senior Member
 
philadd's Avatar
 
Member Since: Jan 2008
Location: Houston TX
Posts: 463
Thanked 25 Times in 23 Posts
Default

My '09 Z06 had 2 wiped cam lobes before the motor reached 40k miles. It was discovered when I was having the heads fixed as a precautionary measure.
philadd is offline  
The Following User Says Thank You to philadd For This Useful Post:
bjmsam (01-22-2019)
Old 01-22-2019, 05:27 PM
  #8  
bjmsam
CF Senior Member
Thread Starter
 
bjmsam's Avatar
 
Member Since: May 2014
Location: Mount Airy MD
Posts: 569
Thanked 35 Times in 30 Posts
Default

Originally Posted by Too-Fast View Post
2011 Z07, 3,000 miles - valve guides worn.
Sorry, that doesn't count. Please see the first post and remove your vote. Thanks!
bjmsam is offline  
Old 01-22-2019, 09:58 PM
  #9  
NVNO1
CF Senior Member
 
NVNO1's Avatar
 
Member Since: Feb 2004
Location: Las Vegas NV
Posts: 596
Thanked 25 Times in 17 Posts
Default

2009 5,700 miles bone stock. Never abused or raced. Oil always at 150 before going over 3k rpm. Dropped valve destroyed motor. Cracked the block. I now have a new AHP forged motor with a host of upgrades to the tune of 30 grand with me doing all the labor.
NVNO1 is offline  
The Following User Says Thank You to NVNO1 For This Useful Post:
bjmsam (01-23-2019)
Old 01-22-2019, 10:03 PM
  #10  
ckchan10
CF Senior Member
 
Member Since: Oct 2007
Posts: 149
Thanks: 0
Thanked 10 Times in 10 Posts
Default

2006 Z06, completely stock except for B&B Fushion exhaust. Dropped an exhaust valve on the track at about 43k miles. Engine was replaced under GMPP no questions asked.
ckchan10 is offline  
The Following User Says Thank You to ckchan10 For This Useful Post:
bjmsam (01-23-2019)
Old 01-23-2019, 06:42 AM
  #11  
sccaGT1racer
CF Senior Member
 
Member Since: Jun 2015
Posts: 400
Thanked 51 Times in 44 Posts
Default

Completely stock 22000 miles spun rod bearings due to connecting rods rubbing together.
sccaGT1racer is offline  
The Following User Says Thank You to sccaGT1racer For This Useful Post:
bjmsam (01-23-2019)
Old 01-23-2019, 06:48 PM
  #12  
flyloeZ06
CF Member
Support Corvetteforum!
 
Member Since: May 2011
Location: Texas
Posts: 66
Thanks: 0
Thanked 2 Times in 2 Posts
Default

At 36k had to replace all the internals due to failed coating on all 8 Ti rods and the rods destroying each others surfaces on the crank.
flyloeZ06 is offline  
The Following User Says Thank You to flyloeZ06 For This Useful Post:
bjmsam (01-23-2019)
Old 01-23-2019, 08:19 PM
  #13  
fred50stang
Junior Member
 
Member Since: Apr 2014
Location: Newnan GA
Posts: 3
Thanked 1 Time in 1 Post
Default

Mine failed at 30000mi, almost on the dot. I have a video of the noise it made. I had the #4 intake lifter fail, then it wiped the cam or vice versa. I believe it was lifter failure, when I had the bad lifter and a good one on the bench upside down, the dinged lifter leaked oil out. I almost put a set of lifters in as a fix. HOWEVER, I knew I wanted to fix or replace heads and I was going to do a cam anyways. There is nothing wrong with my stock heads. Valves are tight. But I bought and installed Texas Speed PRC 285 and BTR stage 3 cam+install kit. My son and I did all the work in the garage. And was tuned by LSxperts. I’m very happy. Need headers now to let it breathe.







Last edited by fred50stang; 01-23-2019 at 08:41 PM.
fred50stang is offline  
The Following User Says Thank You to fred50stang For This Useful Post:
bjmsam (01-24-2019)
Old 01-23-2019, 08:38 PM
  #14  
fred50stang
Junior Member
 
Member Since: Apr 2014
Location: Newnan GA
Posts: 3
Thanked 1 Time in 1 Post
Default Video

Hope this is ok. No advertisements. 12 sec clip of the lifter noise.


Last edited by fred50stang; 01-23-2019 at 08:39 PM.
fred50stang is offline  
Old 01-23-2019, 10:57 PM
  #15  
Brian71
CF Senior Member
 
Brian71's Avatar
 
Member Since: Apr 2015
Location: Toronto Ontario
Posts: 579
Thanked 41 Times in 32 Posts
Default

Stock motor 07 with 93,000 miles. Low oil pressure warning while I was in stop/go traffic. The engine sounded fine. It wound up being a broken bearing. I was lucky, no major engine damage. All bearings replaced, rings replaced, and the crank polished. I had the oil tank modified plus a larger oil pan and baffle.


Brian71 is offline  
The Following User Says Thank You to Brian71 For This Useful Post:
bjmsam (01-24-2019)
Old 01-24-2019, 03:21 PM
  #16  
dcooper23
CF Senior Member
 
Member Since: Oct 2015
Posts: 101
Thanked 1 Time in 1 Post
Default

You may be interested to know that a local guy to me with a BTR cam only 2007 z06 went all the way to 223k miles before going down for a broken wrist pin. He bought the car all stock as a one owner with 219k miles. Lots of highway miles driven daily by a commuting lawyer original owner.
dcooper23 is offline  
Old 01-25-2019, 04:36 PM
  #17  
SivaSuryaKshatriya
CF Senior Member
 
Member Since: May 2017
Location: Seattle WA
Posts: 211
Thanked 30 Times in 26 Posts
Default

NOT my Z06, but my friend's 2008 C6Z had a bearing failure at 22k miles, which necessitated a new engine.
SivaSuryaKshatriya is offline  
The Following User Says Thank You to SivaSuryaKshatriya For This Useful Post:
bjmsam (02-07-2019)
Old 01-28-2019, 02:49 PM
  #18  
R&D
CF Senior Member
 
R&D's Avatar
 
Member Since: Nov 2005
Location: CT
Posts: 284
Thanked 2 Times in 2 Posts
Default

Interesting thread. Based on the fairly small sample size, it looks like around 85% of the engine failures happen before 50,000 miles.

I guess this info is a little comforting to me as I recently purchased a 2008 Z06 with around 56,000 miles on it. I knew about the valve issues with these engines and had planned on doing the heads (and cam) right away, even though next fall would be much better timing for me... but this survey tends to suggest any significant defects that were likely to cause major failure, probably would have already nuked the engine if it was going to happen. Don't take me wrong, I realize there's always that chance I could drop a valve tomorrow with this car, but odds are if it hasn't already happened, and it currently sounds healthy, it probably won't let go if I were to hold off redoing the heads until later this fall. I think I'll just pull the valve covers and check for obvious excessive valve movement and oil consumption. If okay, I'll hold off until next fall to redo the heads.
R&D is offline  
Old 01-28-2019, 03:16 PM
  #19  
RobGOV-DCZ
CF Senior Member
 
Member Since: May 2016
Location: Washington DC
Posts: 248
Thanked 44 Times in 32 Posts
Default

19k miles
rod bearing failed
RobGOV-DCZ is offline  
The Following User Says Thank You to RobGOV-DCZ For This Useful Post:
bjmsam (02-03-2019)
Old 02-18-2019, 07:15 AM
  #20  
bjmsam
CF Senior Member
Thread Starter
 
bjmsam's Avatar
 
Member Since: May 2014
Location: Mount Airy MD
Posts: 569
Thanked 35 Times in 30 Posts
Default

With 30+ votes so far, the number of dropped valves does not seem disproportionately high considering the prevalence of valve to guide clearances reported beyond service limits. It certainly seems prudent to inspect the lifters and cam any time the heads are off and to monitor oil pressure as a rough indication of bearing health.

Originally Posted by R&D View Post
I recently purchased a 2008 Z06 with around 56,000 miles on it. I knew about the valve issues with these engines and had planned on doing the heads (and cam) right away, even though next fall would be much better timing for me... but this survey tends to suggest any significant defects that were likely to cause major failure, probably would have already nuked the engine if it was going to happen. Don't take me wrong, I realize there's always that chance I could drop a valve tomorrow with this car, but odds are if it hasn't already happened, and it currently sounds healthy, it probably won't let go if I were to hold off redoing the heads until later this fall. I think I'll just pull the valve covers and check for obvious excessive valve movement and oil consumption. If okay, I'll hold off until next fall to redo the heads.
That's what I did in 2014 when I bought my car with 62k miles. All clearances were within service limits, and it's still running perfectly with 82k miles. I hope other potential causes of catastrophic failure documented in this thread provide more warning...

Originally Posted by dcooper23 View Post
You may be interested to know that a local guy to me with a BTR cam only 2007 z06 went all the way to 223k miles before going down for a broken wrist pin. He bought the car all stock as a one owner with 219k miles. Lots of highway miles driven daily by a commuting lawyer original owner.
219k in stock form is encouraging! I wonder how much further it would have gone with the stock cam?
bjmsam is offline  

Thread Tools
Search this Thread
Quick Reply: [Z06] mileage before LS7 engine failure stock


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: