[Z06] Engine Locked after 160mph pull
02-25-2012, 01:47 AM
#221
Le Mans Master
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St. Jude Donor '12
I don't want to ruin this thread by turning it into another LS7 reliability debate, when clearly that is not the OP attitude or position, in fact his is quite the opposite.
I'll just say this and be done with it:
What huge amount? Off what basis or facts do you make that statement?, the info here on the forum? We have what 40 or 42 listings of failed LS7 (majority which are modded and tuned anyway ot which we don't know a huge amount of detail) . Nobody knows how many have failed or not failed outside of this forum... no cause has been determined for sure either. Just the same ol banter and blanket statements.
and I am sure I can speak for the majority when I say we all feel terrible when we see a fellow brother have an engine go down, and if you are one of those guys, it's hard to still support LS7 it is what it is.
I'll just say this and be done with it:
What huge amount? Off what basis or facts do you make that statement?, the info here on the forum? We have what 40 or 42 listings of failed LS7 (majority which are modded and tuned anyway ot which we don't know a huge amount of detail) . Nobody knows how many have failed or not failed outside of this forum... no cause has been determined for sure either. Just the same ol banter and blanket statements.
and I am sure I can speak for the majority when I say we all feel terrible when we see a fellow brother have an engine go down, and if you are one of those guys, it's hard to still support LS7 it is what it is.
03-21-2012, 09:07 PM
#225
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Hey guys,
Soooo sorry for the delay! I've had way too many projects going on at once, and I haven't even had time to look at the car yet. Now that it's nice out... I can't stand to look at the car sitting anymore. I will be posting a bunch of pictures up this weekend with progress. Engine must come out!
Stay tuned!!
Soooo sorry for the delay! I've had way too many projects going on at once, and I haven't even had time to look at the car yet. Now that it's nice out... I can't stand to look at the car sitting anymore. I will be posting a bunch of pictures up this weekend with progress. Engine must come out!
Stay tuned!!
03-21-2012, 10:16 PM
#226
Racer
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Hey guys,
Soooo sorry for the delay! I've had way too many projects going on at once, and I haven't even had time to look at the car yet. Now that it's nice out... I can't stand to look at the car sitting anymore. I will be posting a bunch of pictures up this weekend with progress. Engine must come out!
Stay tuned!!
Soooo sorry for the delay! I've had way too many projects going on at once, and I haven't even had time to look at the car yet. Now that it's nice out... I can't stand to look at the car sitting anymore. I will be posting a bunch of pictures up this weekend with progress. Engine must come out!
Stay tuned!!
Don't be sorry! You're allowed to have a life outside your car and this forum.
I have a question though. Was there ever a broken rocker arm in your cars history?
03-23-2012, 01:45 PM
#227
Team Owner
It is a shame about the OP's car but I have to agree with Doug (ECS) on this relative to an abundance of failures. How many LS3/4's do you read about, modded or not. I have owned two C6 Z06's and never had major failures but did have problems during modding to overcome. I have always focused on eliminating oil starvation, providing an adequate flow of fuel, and keeping all moving parts well lubed and cool.
I dont think it is a huge factor (good or bad) but I always used Royal Purple in all my GM vehicles.
I dont think it is a huge factor (good or bad) but I always used Royal Purple in all my GM vehicles.
04-08-2012, 11:03 PM
#230
The ls-7 corvette
Lol. So many try to defend the ls7 motor, and say the ones that gave out are track cars and modded. Its time to just face it...its not a dependable engine. My buddys was a 2006 bone stock, driven like a grandpa when a valve dropped...its not because people arnt changing the oil every 100 miles, or putting a cam in....they are just not made to last. Bottom line
04-09-2012, 08:08 AM
#231
Safety Car
Everyone here, just as you have, can voice their opinion.
My motor dropped a valve, and I'll be honest, I'm not too convinced that the LS7 is a reliable motor.
Hopefully it never happens to you.
My motor dropped a valve, and I'll be honest, I'm not too convinced that the LS7 is a reliable motor.
Hopefully it never happens to you.
04-09-2012, 09:35 AM
#232
Burning Brakes
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Either was the L78 375 in 66-69. Any motor you twist high RPM's bound to have a few that don't make it. I went through 4 L78's in my younger years. I'm sure some other old timers on here will tell you horror stories about that also. If there was a net back then people would be saying stay away from them. Oh and guess what the weak link was, valve train.
04-09-2012, 09:54 AM
#233
Melting Slicks
Either was the L78 375 in 66-69. Any motor you twist high RPM's bound to have a few that don't make it. I went through 4 L78's in my younger years. I'm sure some other old timers on here will tell you horror stories about that also. If there was a net back then people would be saying stay away from them. Oh and guess what the weak link was, valve train.
....nothing new under the sun except the internet....
04-09-2012, 10:45 AM
#234
Burning Brakes
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I restore 66/67 Chevelles, 325hp matching #'s quite a few around. I know they made more but shows the survivor rate of the lower compression/RPM motors. I guess 50 years from now there will be a lot of matching #'s LS3's.
04-09-2012, 12:12 PM
#235
04-12-2012, 09:45 AM
#236
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Baby steps haha!! More to come. No dropped valves. I'm thinking main bearing failure. Heads look fine, so I'm happy. I'll post up pics with heads off soon. When I did the pull to 160mph... I let off the throttle, did a pretty decent deceleration and then pushed the clutch in and went to neutral. Maybe oil starvation? Did I lose oil pressure etc that the engine needed after going to neutral after the long run?
Last edited by FASTBLUEZ06; 04-12-2012 at 11:25 AM.
04-12-2012, 12:10 PM
#237
Race Director
Either was the L78 375 in 66-69. Any motor you twist high RPM's bound to have a few that don't make it. I went through 4 L78's in my younger years. I'm sure some other old timers on here will tell you horror stories about that also. If there was a net back then people would be saying stay away from them. Oh and guess what the weak link was, valve train.
Some are honest, and I've seen it, people admit mistakes...but I'd also be willing to bet Money on the fact that even some of failures we have on our list here on the forum, there is more to the story than posted... I just don't believe every install , tune and part was perfect with those failed engines, and every car was not abused in anyway that is on that blown list.
Last edited by FrankTank; 04-12-2012 at 12:17 PM.
04-12-2012, 02:01 PM
#238
_Sloth Whisperer_
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I just wasted an hour reading all 12 pages, thinking that since it was posted in JANUARY and led by subsequent posts to believe the engine would be right out that there'd be some sort of culmination here.
Good job on the 15 minute process of getting the intake manifold off though so far. I'll be back in August to see what the pistons look like.
Good job on the 15 minute process of getting the intake manifold off though so far. I'll be back in August to see what the pistons look like.
04-12-2012, 02:11 PM
#239
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I just wasted an hour reading all 12 pages, thinking that since it was posted in JANUARY and led by subsequent posts to believe the engine would be right out that there'd be some sort of culmination here.
Good job on the 15 minute process of getting the intake manifold off though so far. I'll be back in August to see what the pistons look like.
Good job on the 15 minute process of getting the intake manifold off though so far. I'll be back in August to see what the pistons look like.
04-12-2012, 10:13 PM
#240
Burning Brakes
oil starvation, interesting question, will be following to see what happened, my bet is a spun bearing, did you have oil analysis done when you drained oil. wouldve provided a bit of information to help with issue of what happened.