[Z06] 07 Valve Guide Wear Results
06-28-2013, 03:08 PM
#21
Le Mans Master
My 08Z is in the shop right now getting the factory heads done as a precaution at 21,000 miles. SS valves, bronze guides, double springs, trunnion upgrade, new pushrods, timing chain; I will report valve guide clearances
As well as:
custom grind cam, ATI underdrive pulley, Tic clutch master, LS9R clutch, heat shielding, splitter brace, seat cushion reinforcement to add to the other mods that includes headers.
As well as:
custom grind cam, ATI underdrive pulley, Tic clutch master, LS9R clutch, heat shielding, splitter brace, seat cushion reinforcement to add to the other mods that includes headers.
06-28-2013, 03:14 PM
#22
Melting Slicks
Clearly the OP missed many shifts and can't drive worth a crap, that is abnormal wear and just doesn't happen on a street driven Z06, only raced/cammed/modded/abused LS7's have issues......oh ya, and there is no "valve issue" it's all made up.........
Should about cover the excuses.
Should about cover the excuses.
Jeezzzz... been away from the forum for a while? I haven't seen this argument from anyone in about a year.
06-28-2013, 04:11 PM
#23
Le Mans Master
Thread Starter
06-28-2013, 04:15 PM
#24
Le Mans Master
Thread Starter
06-28-2013, 04:27 PM
#25
Melting Slicks
Either way, you can sleep better and just enjoy your car for a while. Make sure you reinspect after another 20K. I don't care what anyone tells you about being good to 100K. Cant hurt to look every 20K to be sure your good.
06-29-2013, 08:09 AM
#26
Cool thanks for the updates- I was asking because 3K seems expensive.
Either way, you can sleep better and just enjoy your car for a while. Make sure you reinspect after another 20K. I don't care what anyone tells you about being good to 100K. Cant hurt to look every 20K to be sure your good.
Either way, you can sleep better and just enjoy your car for a while. Make sure you reinspect after another 20K. I don't care what anyone tells you about being good to 100K. Cant hurt to look every 20K to be sure your good.
06-29-2013, 09:30 AM
#27
Data: 07 with 20K miles. Bone stock down to the air filter. 100% street driven.
Results: 6 valves were twice the service limit and 2 were 4 times the service limit (you didn't need a dial guage to see the wiggle on those 2!).
Since I wasn't running a cam or tune, I thought I would be OK--unfortunately that was not the case. The car is actually quieter at idle than stock with the bronze guides and Ferrea superalloy valves.
Cost: $3K parts and labor for the valve job.
Results: 6 valves were twice the service limit and 2 were 4 times the service limit (you didn't need a dial guage to see the wiggle on those 2!).
Since I wasn't running a cam or tune, I thought I would be OK--unfortunately that was not the case. The car is actually quieter at idle than stock with the bronze guides and Ferrea superalloy valves.
Cost: $3K parts and labor for the valve job.
I recall that yours was actually done by a Chevrolet dealership, and that their Master Corvette Tech, Danny Popp, recommend that you go this route for the management of your issue.
Yours is a very interesting case, and thanks for posting it up.
http://forums.corvetteforum.com/c6-z...post1584155073
I am sure, that people picking the thread up right here, and reading forward, will get some terrific insight on where the thinking on the management of this issue, is headed.
Even dealerships are acknowledging it as a viable and legitimate method of management of it.
I hesitated posting for that reason, but decided that the more information available, the better off other owners are in deciding whether the want to have their cars checked.
The shop that did mine has done 7 LS-7s so far and 2 more are scheduled. One of the 7 dropped a valve and was under warranty.
The shop that did mine has done 7 LS-7s so far and 2 more are scheduled. One of the 7 dropped a valve and was under warranty.
As already mentioned, it is clear that yours is also somewhat of a unique situation, in that this method of addressing your issue, long popular in this forum and others, is now "recognized" by an actual GM dealership.
It is significant that they did not simply give you a new set of heads, repolish your existing exhaust valves and re use your existing springs and "send you on your way".
My 08Z is in the shop right now getting the factory heads done as a precaution at 21,000 miles. SS valves, bronze guides, double springs, trunnion upgrade, new pushrods, timing chain; I will report valve guide clearances
As well as:
custom grind cam, ATI underdrive pulley, Tic clutch master, LS9R clutch, heat shielding, splitter brace, seat cushion reinforcement to add to the other mods that includes headers.
As well as:
custom grind cam, ATI underdrive pulley, Tic clutch master, LS9R clutch, heat shielding, splitter brace, seat cushion reinforcement to add to the other mods that includes headers.
Congrats to you all, and best of luck with everything.
Last edited by '06 Quicksilver Z06; 06-29-2013 at 09:45 AM.
06-29-2013, 09:43 AM
#28
Melting Slicks
Price includes hot tank and blast cleaning, installing bronze valve guides, our Stage 2 CNC port program, competition valve job, surface milling and new stainless steel exhaust valves. The titanium intake valves are cleaned, inspected and tumble polished to help reduce valve guide related wear.
He said he got springs so add what?
$500?
Seems like he could've got more for less. Whatever, no need to debate everything. Going back to my original question its why I asked about the price because I was comparing to the full head job from WCCH.
06-29-2013, 09:51 AM
#29
If you send your heads to WCCH you get:
For: $1,518.84
He said he got springs so add what?
$500?
Seems like he could've got more for less. Whatever, no need to debate everything. Going back to my original question its why I asked about the price because I was comparing to the full head job from WCCH.
For: $1,518.84
He said he got springs so add what?
$500?
Seems like he could've got more for less. Whatever, no need to debate everything. Going back to my original question its why I asked about the price because I was comparing to the full head job from WCCH.
The 1518.00, plus $592.00, would put a set of WCCH Stage2 heads with Manley springs in them at $2,110.00
He doesn't mention it, but the possibility exists that he may also be using brand new intake valves, as his dealership might not have sent his old intake valves out for tumble polish and reused them as WCCH does.
And then there is the labor and tax.
Last edited by '06 Quicksilver Z06; 06-29-2013 at 10:07 AM.
06-29-2013, 12:39 PM
#30
Melting Slicks
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Glad you caught this and got it taken care of. As you point out, the hardest part is that nobody really knows how widespread it is, and how to determine what cars are effected or not.
I tend to still think its more widespread than orignally thought, but still not to the point where it's more than 2-3% of total LS7's produced..but I too did my heads. Better to spend 2-3k on head work vs gambling about spending maybe 15k for a new motor
you just don't know
Guide wear is popping up in high mile cars, stock, low mile cars stock..then you got guy that mod and track cars with ok guides that are in spec
It's crap shot, russian roullette , poker, black jack, slot machine all rolled up into one giant gamble of which nobody knows the odds
I tend to still think its more widespread than orignally thought, but still not to the point where it's more than 2-3% of total LS7's produced..but I too did my heads. Better to spend 2-3k on head work vs gambling about spending maybe 15k for a new motor
you just don't knowGuide wear is popping up in high mile cars, stock, low mile cars stock..then you got guy that mod and track cars with ok guides that are in spec
It's crap shot, russian roullette , poker, black jack, slot machine all rolled up into one giant gamble of which nobody knows the odds