Alright, how bad exactly, is the C6ZO6 valve guide issue?
- Thread starter HEMI LOL
- Start date
If I were getting one, I'd make sure to have $2-$3k extra to do the heads if they were not already addressed. A lot of people go with out fixing them and are fine, then there's also a lot of them that poop the bed. To me it's worth the extra money for piece of mind. I'd rather spend a couple grand for the heads than $10k for a new motor if it doesn't have warranty anymore.
Supposedly the '07 cars were the worst. If I was getting a C6Z it'd be getting a H/C/I package anyways, so crisis averted.
In for opinions on this, too. They are a tempting platform.
How about asking it on a Chevy forum for more responses?
The 7.0l definitely isnt a turd. I remember seeing some magazine rating the top ten factory engines and the LS7 was in there along with the Terminator engine. I cant remember seeing one for sale without head work done already. If you want one Id look for that.
Lol
2006/07 were the worst. Corvette forum had an article a couple of years ago with some reputable techs and the numbers were somewhere in the 25-30% range for those years. You want to shop 2008 and newer anyway, Better transmissions (TR6060 vs T56)
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2007 cars had a bad batch of rocker arms. The bearings had a tendency to free themselves into the engine. No catastrophic failures to my knowledge from the bad rockers, as the bearings wouldn't get past the oil pickup screen.
The valve guide issue affects all years of the LS7. Don't let it stop you from buying a c6z. The fix is to have the guides replaced/heads rebuilt and the guides must continue to be monitored over time. That's the bad news, the good news is the c6z is stupid easy to work on. It takes about 5 minutes to pull the valve covers and the heads can easily be swapped in an afternoon. Ever try that on a terminator?
Feel free to shoot me a pm with any questions. I learned quite a bit about the c6z with mine--some lessons the hard way.
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^^^^this! Very easy to work on, it's basically a sports car built by playskool.
So even after having the guides replaced they are still prone to issues?
Depends a lot on cam and rocker choice. Stock cam and rockers will likely be fine for a long time. Go aftermarket and the story changes. Lots of variables to have a yes or no answer.
Overblown. My C6Z had the heads done when I bought it. Drove the shit out of it with no issues.
Buy one with heads addressed & enjoy life. Win.
Buy one with heads addressed & enjoy life. Win.
Not if you use good rockers. Mine was fine.
2008+ had the valve issues too. Unless you want 1k+ WHP, the TR6060 does you no good. T56 is fine.
Less then 10% and Better shift forks and synchros, but we can agree to disagree
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You just made my point for me. They all have the valve issue. You wanna fix it? Do the heads no matter what year you buy because they can go no matter what year it is.
/thread
I'm not arguing your point, You are....lol. Sorry I took the bait....
My friend bought a 2009 a couple months ago with the GM warranty. Lucky that he had it because he had his engine destroyed by the valve issue. I wouldn't buy one without a warranty or the heads done.
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