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LS7 Valve Issue

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Old Jul 11, 2013 | 10:15 PM
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Default LS7 Valve Issue

Pretty much sums it up.....
http://forums.corvetteforum.com/c6-z...post1583836281


Last edited by Whistler; Jul 16, 2013 at 11:46 AM.
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Old Jul 11, 2013 | 10:33 PM
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Originally Posted by bozzhawg
Man give me the cliff notes or summary, I cain't read through all of that ****. LOL
You'll read it and figure it out if your serious enough about it where it will or has affected you
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Old Jul 11, 2013 | 11:12 PM
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Glad my heads are already done from Richard at WCCH!
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Old Jul 12, 2013 | 08:01 AM
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Who the f*ck cares? If having stock valves scares you so much, then change them. Hell, while you're at it change the heads out for a MAST/Brodix/RHS/All-Pro.... you bought a z06, not a pinto.
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Old Jul 12, 2013 | 09:29 AM
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Are they still debating this issue? The dropped exhaust valve was an issue back like 4 years ago. They still haven't figured it out? Wtf?
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Old Jul 12, 2013 | 09:32 AM
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Originally Posted by JakeFusion™
Are they still debating this issue? The dropped exhaust valve was an issue back like 4 years ago. They still haven't figured it out? Wtf?
I think what it is now is that people are buying Z06 vettes used now that were never driven hard and tracking them. The issue didn't come up in cars that were just cruised around on the weekends.
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Old Jul 12, 2013 | 09:43 AM
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I'm not reading thru 14 pages of some broads arguing about ls7 valves dropping. Most of those guys on CF are drama queens anyway.
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Old Jul 12, 2013 | 09:49 AM
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Well I dropped a valve 2 weeks ago on my 2007 z06 and it had 16000 miles on it. Zero mods bone stock. Really glad I spent that kind of mony for nothing. The whole engine is junk. Cracked the block, took out both heads even the intake. Happend on the freeway and snapped the bolts to the flywheel clean off as well. What a POS! GM said its on me to replace it with a full crate motor but it will be discounted to 10,400 . Then labor. .....

Last edited by Norge; Jul 12, 2013 at 09:51 AM. Reason: Forgot something
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Old Jul 12, 2013 | 10:48 AM
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Originally Posted by Norge
Well I dropped a valve 2 weeks ago on my 2007 z06 and it had 16000 miles on it. Zero mods bone stock. Really glad I spent that kind of mony for nothing. The whole engine is junk. Cracked the block, took out both heads even the intake. Happend on the freeway and snapped the bolts to the flywheel clean off as well. What a POS! GM said its on me to replace it with a full crate motor but it will be discounted to 10,400 . Then labor. .....
how does a dropped valve destroy the head on the other side? Don't think we didn't notice you signed up today either....
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Old Jul 12, 2013 | 12:00 PM
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Originally Posted by JakeFusion™
Are they still debating this issue? The dropped exhaust valve was an issue back like 4 years ago. They still haven't figured it out? Wtf?
The problem is they only drink the Katech cool aid and whatever Jason says is gold. He said there was no issue. They believed. He said there is an issue but not the valve. They bow. He says he is constipated and they send him exlax over night air freight! It's ridiculous....

Last edited by ramairws6; Mar 19, 2017 at 06:11 PM.
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Old Jul 12, 2013 | 01:12 PM
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Originally Posted by Norge
Well I dropped a valve 2 weeks ago on my 2007 z06 and it had 16000 miles on it. Zero mods bone stock. Really glad I spent that kind of mony for nothing. The whole engine is junk. Cracked the block, took out both heads even the intake. Happend on the freeway and snapped the bolts to the flywheel clean off as well. What a POS! GM said its on me to replace it with a full crate motor but it will be discounted to 10,400 . Then labor. .....
Sorry to hear. I guess you didn't have this happen under GMs 5year/100k power train warranty. IF*** you decide to keep it, might as well build a engine the way ya want. Sorry for your luck.
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Old Jul 12, 2013 | 01:28 PM
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Originally Posted by 87silverbullet
I'm not reading thru 14 pages of some broads arguing about ls7 valves dropping. Most of those guys on CF are drama queens anyway.
took the words right out of my mouth!!!!!!!!!!!!!

but Corvetteforum.com is the best corvette forum on the internet (free Google search algorithm bump for the CF sponsors)
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Old Jul 12, 2013 | 03:11 PM
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Originally Posted by ramairws6
I don't understand why this seems to be some kind of gotcha moment catching me in a lie. It's pretty much the same thing I've been saying on the forum for a while, just with the added comment about tuning cars on the limit and finishing them off. This comment was made before GM stated it was a machining issue in the heads. At that time we were searching for answers.
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Old Jul 12, 2013 | 03:16 PM
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Originally Posted by Katech_Jason
I don't understand why this seems to be some kind of gotcha moment catching me in a lie. It's pretty much the same thing I've been saying on the forum for a while, just with the added comment about tuning cars on the limit and finishing them off. This comment was made before GM stated it was a machining issue in the heads. At that time we were searching for answers.
Man, just keep doing what you were doing. Let the haters keep drinking haterade.

Nobody understands that one person can't know everything.
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Old Jul 12, 2013 | 09:07 PM
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I use to think the LS7 valve issue was with the addition of an after market cam only, now I believe is an "epic demic" or a demolition syndrome, else the block has at list a couple of sleeves that are trash in every one of them "too thin" and are quick to expose themselves as soon as you add power.
Another issue with GM is, you are on your own if you have any trouble with their high performance crate engines.
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Old Jul 13, 2013 | 07:26 AM
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Originally Posted by kickassT/A
how does a dropped valve destroy the head on the other side? Don't think we didn't notice you signed up today either....
I did just sign up. It's been 6 years since I owned my 2003 Z06 and was a member. But divorce and life happens. Now as for the other head, I was going at a very good rate of speed and it tore the s... Out of everything. I can see the crank from under the valve cover. I will get some pictures. I believe it's a cement mixer now.
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Old Jul 13, 2013 | 07:29 AM
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Originally Posted by bozzhawg
Time for a LSX 454, its about $9500 racks.

Mo powa!

It won't be numbers matching anyway, go with the cubes.
The extra weight will throw the balance of the car off. I road race not drag race.
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Old Jul 13, 2013 | 07:38 AM
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I'm going with MTI. They said ss valves and a callies rotating assembly. 454 ci and 700+ hp. No titanium for me anymore. Im not going to have 2 ls7 coffee tables.
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Old Jul 14, 2013 | 02:00 PM
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Originally Posted by ramairws6
Bump this bitch up! I'm so sick of hearing the lies and it's time to expose the issues where the high rollers sit and reap the bennies and say there isn't a problem while all of our heads explode. It's simply sad....
You come across like a moron.

115k miles on my z06 stock exhuast valves. Big cams and dual springs.
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Old Jul 14, 2013 | 05:01 PM
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So now it's heat?
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