[Z06] The "Out of Spec" Guide Wear Registry
05-27-2016, 08:12 PM
#441
2006 with 24,000 Miles exact at time of pulling heads
Stock Car not tracked just weekend warrior, no noises and i like to rev it to 7k
AHP did my heads due 3 more guys i know that dropped a valve 1 of them with 5k on the odo on a 2009 previous owner put a new engine before he bought her.
Im happy and not scared to drive the car and beat it!
Your raw wiggle test for your heads is as follows:
#1 int: .013"
#1 exh: .009"
#3 int: .010"
#3 exh: .008"
#5 in: .0095"
#5 exh: .009"
#7 int: .010"
#7 exh: .009"
#2 int: .010"
#2 exh: .0085"
#4 int: .009"
#4 exh: .008"
#6 int: .0095"
#6 exh: .008"
#8 int: .011"
#8 exh: .009"
Stock Car not tracked just weekend warrior, no noises and i like to rev it to 7k
AHP did my heads due 3 more guys i know that dropped a valve 1 of them with 5k on the odo on a 2009 previous owner put a new engine before he bought her.
Im happy and not scared to drive the car and beat it!
Your raw wiggle test for your heads is as follows:
#1 int: .013"
#1 exh: .009"
#3 int: .010"
#3 exh: .008"
#5 in: .0095"
#5 exh: .009"
#7 int: .010"
#7 exh: .009"
#2 int: .010"
#2 exh: .0085"
#4 int: .009"
#4 exh: .008"
#6 int: .0095"
#6 exh: .008"
#8 int: .011"
#8 exh: .009"
09-09-2016, 03:24 PM
#443
Melting Slicks
Include me on your list:
2008 - stock with approximately 32,000 miles. Most of the guides were out of spec. Katech did the head repair along with their Stage One. Here's a link that includes a spec sheet on the guide wear
https://www.corvetteforum.com/forums...6-sn-91-a.html
2008 - stock with approximately 32,000 miles. Most of the guides were out of spec. Katech did the head repair along with their Stage One. Here's a link that includes a spec sheet on the guide wear
https://www.corvetteforum.com/forums...6-sn-91-a.html
01-16-2017, 08:19 AM
#444
Racer
This thread will be a “sister” thread to “The "In Spec" guide wear registry."
The purpose is to get a grasp of how many guide wear test results are coming back with out of spec guides and from which years.
If you have inspected your guides and they have come back out of spec based on the 0.0037” service limit (that means you have at least one guide measuring 0.0037” or more), please reply with the year of your Z06, any mods and the miles at inspection. You can also attach a spec sheet of the measurements if you have one and cite who did the inspection. Hopefully we can use this data to get a better idea of the percentage of problems out there.
If you are looking to find a shop that can perform a wiggle test on your heads, see the list of Vendors below or check the Crowdsourced Interactive Map of Wiggle Testers
This is not a thread to debate the valve drop issues, or how to fix it. This is not a thread for cars who have in spec guides. This is not a thread for drama. Please try to keep it as clean as possible and on topic.
The results will be grouped by year and then by member name. There is now a separate list to record any out of spec bronze guide heads. Many of the members on this list originally posted in THIS THREAD.
**************************************** ****************
**************************************** ****************
VENDOR POSTS on Out Of Spec Guides:
American Heritage Performance: LINK
.................Wiggle Test DIY: LINK
East Coast Supercharging: LINK
HorsePowerAddicts: LINK
Vengeance Racing: LINK
**************************************** ****************
**************************************** ****************
-----------------------------------------------------------------------
THE OUT OF SPEC LIST: (stock powdered metal guides)
2006: 51 .................. 6272 produced (20.5% of production)
2007: 48 .................. 8159 produced (26.7% of production)
2008: 51 .................. 7731 produced (25.3% of production)
2009: 30 .................. 3461 produced (11.3% of production)
2010: 5 ..................... 518 produced (1.70% of production)
2011: 5 ..................... 904 produced (3.00% of production)
2012: 2 ..................... 478 produced (1.60% of production)
2013: 1 ..................... 471 produced (1.50% of production)
427: 2 ..................... 2552 produced (8.40% of production)
TOTAL: 195 (As of 01/27/15, ~89% of those tested and reported to the forum are out of spec)
------------------------[2006]-----------------------------------------
'06 Quicksilver Z06: 2006 Z06. 20,000 miles link
'06 Quicksilver Z06: 2006 Z06. 31,000 miles link heads purchased used
1981turbota: 2006 Z06. 25,000 miles link
1988Bullitt: 2006 Z06. 34,000 miles link
2006FRCZ19: 2006 Z06. 55,000 miles link
240sx2jz: 2006 Z06. 25,000 miles link
2K6Z06: 2006 Z06. 9,200 miles link
610slvZ: 2006 Z06. 27,000 miles link
adamgl: 2006 Z06. 23,500 miles link heads, cam headers, stock guides out of spec with solid valves
Al Green: 2006 Z06. 20,000 miles link
anth115: 2006 Z06. 23,000 miles link
biggfroggy: 2006 Z06. 13,000 miles link
BMurphy: 2006 Z06. 47,000 miles link
Bonnetts02Vette: 2006 Z06. 11,000 miles link
BoostedEBZ06: 2006 Z06. 35,000 miles link
bright1984: 2006 Z06. 22,000 miles link tune, cai, headers, exhaust
BrokerDon: 2006 Z06. 50,000 miles link
c6 zeee06: 2006 Z06. 15,000 miles link
caker: 2006 Z06. 18,000 miles link car raced "hard"
clogan: 2006 Z06. 39,100 miles link
ctsv510: 2006 Z06. 17,400 miles link link2
D-Rod: 2006 Z06. 11,000 miles link blower, meth, upgraded rockers, kooks
dmuellenberg: 2006 Z06. 99,500 miles link
double06: 2006 Z06. 10,000 miles link
erichg1000: 2006 Z06. 30,000 miles link
FRDnemesis: 2006 Z06. 22,000 miles link exhaust, intake, tune
GeneSch: 2006 Z06. 10,300 miles link intake and exhaust guides out of spec
H82BFST: 2006 Z06. 19,000 miles link
Homeboy77: 2006 Z06. 36,000 miles link
Is2scooby: 2006 Z06. 17,000 miles link
Joe in Az: 2006 Z06. 16,000 miles link tune, cai, headers
Josh B.: 2006 Z06. 37,000 miles link
Katech_Jason: 2006 Z06. 23,000 miles link
Katech SN#71:(non member) 2006 Z06. unknown miles link
Leo the Lion: 2006 Z06. 29,641 miles link
mariofromnewyork: 2006 Z06. 12,000 miles link
MIGHTYMOUSE: 2006 Z06. 135,000 miles link
mistermog: 2006 Z06. 11,000 miles link intake
musicmankeb: 2006 Z06. 16,000 miles link
nitrojunky: 2006 Z06. 39,000 miles link
"NO SHOW": 2006 Z06. 14,000 miles link
nuclearnick: 2006 Z06. 60,000 miles link cam
NV MY C5: 2006 Z06. 31,000 miles link
Peter Clark: 2006 Z06. 20,000 miles link
richy rich: 2006 Z06. 16,000 miles link
TRSCobra: 2006 Z06. 27,000 miles link
Turbosixx: 2006 Z06. 20,000 miles link
turbotank: 2006 Z06. 69,000 miles link
Unreal: 2006 Z06. 18,000 miles link inatke and exhaust valves out of spec
Z06-HEC*: 2006 Z06. 40,000 miles link
Zogman: 2006 Z06. 55,000 miles link
-------------------------[2007]----------------------------------------
021z: 2007 Z06. 49,000 miles link
2k Cobra: 2007 Z06. 43,000 miles link
blackc6z: 2007 Z06. 29,000 miles link cam, solid stainless exh valves, stock guides. no wear at 21k miles before cam/valve install
C5Lion: 2007 Z06. unknown miles link
C6Zhopeful393: 2007 Z06. unknown miles link
chris2000: 2007 Z06. 12,400 miles link
crf538: 2007 Z06. 18,000 miles link
Darius: 2007 Z06. 24,000 miles link dropped valve in original motor at 36k miles, worn valve guides in new replacement motor
Fifedogg: 2007 Z06. 26,000 miles link link2 cam, stock guides, solid exh valves
fly a Z06: 2007 Z06. 65,000 miles link tuned, k&n
GMuffley: 2007 Z06. 20,000 miles link
harrydirty: 2007 Z06. 13,700 miles link
hoefi: 2007 Z06. 11,000 miles link blown motor
ITCH: 2007 Z06. 15,144 miles link intake & exhaust guides out of spec
jedblanks: 2007 Z06. 16,000 miles link
jeffreystar: 2007 Z06. unknown miles link headers, intake
john_g_46: 2007 Z06. 88,000 miles link
Joshua Detwiler: 2007 Z06. unknown miles link
JRRSA: 2007 Z06. 8,000 miles link
Katech SN#70:(non member) 2007 Z06. 35,000 miles link
Kouasupra: 2007 Z06. 34,000 miles link
lane_change: 2007 Z06. 32,000 miles link cam
MarkC: 2007 Z06. 21,000 miles link
meanjoe: 2007 Z06. 5,000 miles link
NavyAirTraffic: 2007 Z06. 19,100 miles link
OVG: 2007 Z06. 18,863 miles link
parsonsj: 2007 Z06. 7,500 miles link
PeteZ06: 2007 Z06. unknown miles link
ratomicZ06: 2007 Z06. 14,000 miles link
rio95: 2007 Z06. 15,000 miles link
rnoack: 2007 Z06. unknown miles link
rockinSeat: 2007 Z06. 22,000 miles link
ROUTE 66: 2007 Z06. 25,000 miles link
Spiffshady: 2007 Z06. 41,000 miles link
stew1100: 2007 Z06. 23,000 miles link
toroz06: 2007 Z06. 9,000 miles link
triblk6spd: 2007 Z06. 20,000 miles link
troy6166: 2007 Z06. 15,000 miles link cam, solid stainless exh valves, stock guides. no wear at 7k miles before cam/valve install
Uncledibble: 2007 Z06. 84,500 miles link
veilseven: 2007 Z06. 38,000 miles link
wagoetzmann: 2007 Z06. 24,139 miles link intake valve out based on X/2 - .0005" calc
Woz Z06: 2007 Z06. 16,000 miles link
Yankee15: 2007 Z06. ~20,000 link
youzzi714: 2007 Z06. unknown miles link
Z06guy07: 2007 Z06. unknown miles link
Z06pete: 2007 Z06. 13,000 miles link
Zoxxo: 2007 Z06. 71,000 miles link
zuli: 2007 Z06. 27,000 miles link
-------------------------[2008]----------------------------------------
08VRZ06: 2008 Z06. 24,000 miles link
1fastC3: 2008 Z06. 38,000 miles link
4wheels: 2008 Z06. 31,000 miles link
80atez: 2008 Z06. 25,000 miles link
AZDANZ06: 2008 Z06. 27,000 miles link
banipal19: 2008 Z06. 9,000 miles link link2
bigdog1250: 2008 Z06. 31,000 miles link
big_mike_eu: 2008 Z06. 15,500 miles link
BignastyBRP: 2008 Z06. 38,000 miles link
bktmbill: 2008 Z06. 7,700 miles link
blkbrd69: 2008 Z06. 20,000 miles link
BosnianZ06: 2008 Z06. 24,000 miles link
bp2826: 2008 Z06. 52,000 miles link
Buddy A: 2008 Z06. 12,500 miles link
ClarksZ06: 2008 Z06. 9,000 miles link headers, cam, tune
conner.mcgrath: 2008 Z06. 47,000 miles link
Cozmo: 2008 Z06. 26,500 miles link
DaOtherOne: 2008 Z06. 35,000 miles link katech stage 1
ericszr1: 2008 Z06. 25,000 miles link
flyloeZ06: 2008 Z06. unknown miles link
Glenm27: 2008 Z06. 22,000 miles link tracked
HMFIC: 2008 Z06. unknown miles link
hot-toy: 2008 Z06. 13,500 miles link
JCox23: 2008 Z06. 10,500 miles link ferrea stainless valves (stock guides), cam, ported heads, intake, tb, headers
juanvaldez: 2008 Z06. 48,000 miles link
jwebsta32: 2008 Z06. 30,000 miles link
JP426: 2008 Z06. 17,736 miles link
Kneel 8250: 2008 Z06. 41,000 miles link Previous measurement at 34k miles showed in spec
Les: 2008 Z06. 26,900 miles link
londonk: 2008 Z06. 8,000 miles link
Mark Wade: 2008 Z06. 8,000 miles link
MHCvette: 2008 Z06. 12,567 miles link link2
Mike Hoppe: 2008 Z06. 11,000 miles link stock, intake and exhaust guides both out of spec
moose.b3: 2008 Z06. 40,000 miles link
mygiftmycurse: 2008 Z06. 22,800 miles link
MyLastCorvette: 2008 Z06. 9,000 miles link
Oskee: 2008 Z06. 10,000 miles link
property1: 2008 Z06. 18,000 miles video link link2
psp6158: 2008 Z06. 5,000 miles link
rapidroy: 2008 Z06. 18,000 miles link
SONKIST: 2008 Z06. 10,000 miles link
starr1: 2008 Z06. 17,000 miles link
timafey: 2008 Z06. 20,000 miles link
Titan C6Z: 2008 Z06. 13,900 miles link
vetteuphoria: 2008 Z06. 19,000 miles link
wolf8218: 2008 Z06. 23,000 miles link
yagrmiestr: 2008 Z06. 21,000 miles link
yrkZ06: 2008 Z06. 14,000 miles link
Z.06: 2008 Z06. 14,000 miles link
Zeaux6504: 2008 Z06. 20,000 miles link intake and exhaust out of spec
zman62: 2008 Z06. 4,000 miles link
-------------------------[2009]----------------------------------------
06HWRX: 2009 Z06. 17,500 miles link
1badtantrum: 2009 Z06. 14,300 miles link
71'AirStrike: 2009 Z06. 36,000 miles link
beden1: 2009 Z06. 6,400 miles link
chevybob: 2009 Z06. 10,000 miles link
CliffyDeuce: 2009 Z06. 19,000 miles link
cruzin2: 2009 Z06. 9,000 miles link
Dogged: 2009 Z06. 18,000 miles link
DON T.: 2009 Z06. 17,000 miles link
erick_e: 2009 Z06. 36,238 miles link
EWK: 2009 Z06. 7,666 miles link link2
EX1: 2009 Z06. 16,000 miles link link2 cam
jbs02somws6: 2009 Z06. 24,000 miles link cai
lawman34203: 2009 Z06. unknown miles link
LawrenceFromTorrence: 2009 Z06. 20,000 miles link
Maligator: 2009 Z06. 6,900 miles link
Mar48: 2009 Z06. 43,000 miles link
Mark200X: 2009 Z06. 50,000 miles link
Maxrr: 2009 Z06. 19,000 miles link
MHCvette: 2009 Z06. 30,642 miles link link2
morris: 2009 Z06. 32,000 miles link cam + track time
MTDave: 2009 Z06. 34,000 miles link
MyLs1Hauls: 2009 Z06. 10,000 miles link
nzk: 2009 Z06. 23,000 miles link
reasonable suspicion: 2009 Z06. 7,500 miles link link2
RegnaR: 2009 Z06. 22,000 miles link
rocksts: 2009 Z06. 19,000 miles link
stealth1281: 2009 Z06. 19,000 miles link
Wass: 2009 Z06. 45,000 miles link
wjnjr: 2009 Z06. 16,000 miles link link2 link3
-------------------------[2010]----------------------------------------
Gearpuller: 2010 Z06. 21,500 miles link
indyspeed: 2010 Z06. 5,743 miles link intake valve guides out of spec
oversteer: 2010 Z06. 7,500 miles link
roadandtrack: 2010 Z06. 7,500 miles link
Smkn 07: 2010 Z06. 34,000 miles link
-------------------------[2011]----------------------------------------
billyjo: 2011 Z06. 4,500 miles link
Dirty Howie: (2011 heads Z06). 32,000 miles link 2011 replacement motor
Minkster: 2011 Z06. 28,080 miles link
phipp85: 2011 Z06. 27,000 miles link intake valves guides out of spec
Z06_1: 2011 Z06. 16,000 miles link intake valve guides out of spec
-------------------------[2012]----------------------------------------
CGZ06: (2012 motor Z06). 400 miles link 2012 built replacement motor put in his '09 after original dropped valve
Hib Halverson: 2012 Z06. 15,000 miles link
-------------------------[2013]----------------------------------------
subfloor@centurytrans: 2013 Z06. <5,000 miles link supporting vendor, removed heads from 2013 Z06 with out of spec intake guides
-------------------------[427]----------------------------------------
garye: 2013 427 Vert. 4,000 miles link intake guides out of spec
Z06_1: 2013 427 Vert. 4,000 miles link intake guides out of spec
-----------------------------------------------------------------------
######################################## ###########
-----------------------------------------------------------------------
-----------------------------------------------------------------------
OUT OF SPEC LIST: (aftermarket bronze guides)
*3 Reported
American Heritage: unknown owner, year, mileage link link2 owner was told by previous owner heads were done by WCCH 20k miles prior
American Heritage: unknown owner, year, 15k miles on heads link link2 owner was told by previous owner that heads were done by WCCH 5k miles prior to sale. Car has unknown aftermaket cam
andy82: 2007 Z06. 7,000 miles on new PRC heads link
-----------------------------------------------------------------------
-----------------------------------------------------------------------
OUT OF SPEC LIST: (crate motor / LS7 swap in other vehicles)
*2 Reported
BillY2KFRC: 2008 built crate LS7. 23,000 miles link installed in C5 Z06
C5 LS7: 2006 built crate LS7. 35,000 miles installed in C5
-----------------------------------------------------------------------
The purpose is to get a grasp of how many guide wear test results are coming back with out of spec guides and from which years.
If you have inspected your guides and they have come back out of spec based on the 0.0037” service limit (that means you have at least one guide measuring 0.0037” or more), please reply with the year of your Z06, any mods and the miles at inspection. You can also attach a spec sheet of the measurements if you have one and cite who did the inspection. Hopefully we can use this data to get a better idea of the percentage of problems out there.
If you are looking to find a shop that can perform a wiggle test on your heads, see the list of Vendors below or check the Crowdsourced Interactive Map of Wiggle Testers
This is not a thread to debate the valve drop issues, or how to fix it. This is not a thread for cars who have in spec guides. This is not a thread for drama. Please try to keep it as clean as possible and on topic.
The results will be grouped by year and then by member name. There is now a separate list to record any out of spec bronze guide heads. Many of the members on this list originally posted in THIS THREAD.
**************************************** ****************
**************************************** ****************
VENDOR POSTS on Out Of Spec Guides:
American Heritage Performance: LINK
.................Wiggle Test DIY: LINK
East Coast Supercharging: LINK
HorsePowerAddicts: LINK
Vengeance Racing: LINK
**************************************** ****************
**************************************** ****************
-----------------------------------------------------------------------
THE OUT OF SPEC LIST: (stock powdered metal guides)
2006: 51 .................. 6272 produced (20.5% of production)
2007: 48 .................. 8159 produced (26.7% of production)
2008: 51 .................. 7731 produced (25.3% of production)
2009: 30 .................. 3461 produced (11.3% of production)
2010: 5 ..................... 518 produced (1.70% of production)
2011: 5 ..................... 904 produced (3.00% of production)
2012: 2 ..................... 478 produced (1.60% of production)
2013: 1 ..................... 471 produced (1.50% of production)
427: 2 ..................... 2552 produced (8.40% of production)
TOTAL: 195 (As of 01/27/15, ~89% of those tested and reported to the forum are out of spec)
------------------------[2006]-----------------------------------------
'06 Quicksilver Z06: 2006 Z06. 20,000 miles link
'06 Quicksilver Z06: 2006 Z06. 31,000 miles link heads purchased used
1981turbota: 2006 Z06. 25,000 miles link
1988Bullitt: 2006 Z06. 34,000 miles link
2006FRCZ19: 2006 Z06. 55,000 miles link
240sx2jz: 2006 Z06. 25,000 miles link
2K6Z06: 2006 Z06. 9,200 miles link
610slvZ: 2006 Z06. 27,000 miles link
adamgl: 2006 Z06. 23,500 miles link heads, cam headers, stock guides out of spec with solid valves
Al Green: 2006 Z06. 20,000 miles link
anth115: 2006 Z06. 23,000 miles link
biggfroggy: 2006 Z06. 13,000 miles link
BMurphy: 2006 Z06. 47,000 miles link
Bonnetts02Vette: 2006 Z06. 11,000 miles link
BoostedEBZ06: 2006 Z06. 35,000 miles link
bright1984: 2006 Z06. 22,000 miles link tune, cai, headers, exhaust
BrokerDon: 2006 Z06. 50,000 miles link
c6 zeee06: 2006 Z06. 15,000 miles link
caker: 2006 Z06. 18,000 miles link car raced "hard"
clogan: 2006 Z06. 39,100 miles link
ctsv510: 2006 Z06. 17,400 miles link link2
D-Rod: 2006 Z06. 11,000 miles link blower, meth, upgraded rockers, kooks
dmuellenberg: 2006 Z06. 99,500 miles link
double06: 2006 Z06. 10,000 miles link
erichg1000: 2006 Z06. 30,000 miles link
FRDnemesis: 2006 Z06. 22,000 miles link exhaust, intake, tune
GeneSch: 2006 Z06. 10,300 miles link intake and exhaust guides out of spec
H82BFST: 2006 Z06. 19,000 miles link
Homeboy77: 2006 Z06. 36,000 miles link
Is2scooby: 2006 Z06. 17,000 miles link
Joe in Az: 2006 Z06. 16,000 miles link tune, cai, headers
Josh B.: 2006 Z06. 37,000 miles link
Katech_Jason: 2006 Z06. 23,000 miles link
Katech SN#71:(non member) 2006 Z06. unknown miles link
Leo the Lion: 2006 Z06. 29,641 miles link
mariofromnewyork: 2006 Z06. 12,000 miles link
MIGHTYMOUSE: 2006 Z06. 135,000 miles link
mistermog: 2006 Z06. 11,000 miles link intake
musicmankeb: 2006 Z06. 16,000 miles link
nitrojunky: 2006 Z06. 39,000 miles link
"NO SHOW": 2006 Z06. 14,000 miles link
nuclearnick: 2006 Z06. 60,000 miles link cam
NV MY C5: 2006 Z06. 31,000 miles link
Peter Clark: 2006 Z06. 20,000 miles link
richy rich: 2006 Z06. 16,000 miles link
TRSCobra: 2006 Z06. 27,000 miles link
Turbosixx: 2006 Z06. 20,000 miles link
turbotank: 2006 Z06. 69,000 miles link
Unreal: 2006 Z06. 18,000 miles link inatke and exhaust valves out of spec
Z06-HEC*: 2006 Z06. 40,000 miles link
Zogman: 2006 Z06. 55,000 miles link
-------------------------[2007]----------------------------------------
021z: 2007 Z06. 49,000 miles link
2k Cobra: 2007 Z06. 43,000 miles link
blackc6z: 2007 Z06. 29,000 miles link cam, solid stainless exh valves, stock guides. no wear at 21k miles before cam/valve install
C5Lion: 2007 Z06. unknown miles link
C6Zhopeful393: 2007 Z06. unknown miles link
chris2000: 2007 Z06. 12,400 miles link
crf538: 2007 Z06. 18,000 miles link
Darius: 2007 Z06. 24,000 miles link dropped valve in original motor at 36k miles, worn valve guides in new replacement motor
Fifedogg: 2007 Z06. 26,000 miles link link2 cam, stock guides, solid exh valves
fly a Z06: 2007 Z06. 65,000 miles link tuned, k&n
GMuffley: 2007 Z06. 20,000 miles link
harrydirty: 2007 Z06. 13,700 miles link
hoefi: 2007 Z06. 11,000 miles link blown motor
ITCH: 2007 Z06. 15,144 miles link intake & exhaust guides out of spec
jedblanks: 2007 Z06. 16,000 miles link
jeffreystar: 2007 Z06. unknown miles link headers, intake
john_g_46: 2007 Z06. 88,000 miles link
Joshua Detwiler: 2007 Z06. unknown miles link
JRRSA: 2007 Z06. 8,000 miles link
Katech SN#70:(non member) 2007 Z06. 35,000 miles link
Kouasupra: 2007 Z06. 34,000 miles link
lane_change: 2007 Z06. 32,000 miles link cam
MarkC: 2007 Z06. 21,000 miles link
meanjoe: 2007 Z06. 5,000 miles link
NavyAirTraffic: 2007 Z06. 19,100 miles link
OVG: 2007 Z06. 18,863 miles link
parsonsj: 2007 Z06. 7,500 miles link
PeteZ06: 2007 Z06. unknown miles link
ratomicZ06: 2007 Z06. 14,000 miles link
rio95: 2007 Z06. 15,000 miles link
rnoack: 2007 Z06. unknown miles link
rockinSeat: 2007 Z06. 22,000 miles link
ROUTE 66: 2007 Z06. 25,000 miles link
Spiffshady: 2007 Z06. 41,000 miles link
stew1100: 2007 Z06. 23,000 miles link
toroz06: 2007 Z06. 9,000 miles link
triblk6spd: 2007 Z06. 20,000 miles link
troy6166: 2007 Z06. 15,000 miles link cam, solid stainless exh valves, stock guides. no wear at 7k miles before cam/valve install
Uncledibble: 2007 Z06. 84,500 miles link
veilseven: 2007 Z06. 38,000 miles link
wagoetzmann: 2007 Z06. 24,139 miles link intake valve out based on X/2 - .0005" calc
Woz Z06: 2007 Z06. 16,000 miles link
Yankee15: 2007 Z06. ~20,000 link
youzzi714: 2007 Z06. unknown miles link
Z06guy07: 2007 Z06. unknown miles link
Z06pete: 2007 Z06. 13,000 miles link
Zoxxo: 2007 Z06. 71,000 miles link
zuli: 2007 Z06. 27,000 miles link
-------------------------[2008]----------------------------------------
08VRZ06: 2008 Z06. 24,000 miles link
1fastC3: 2008 Z06. 38,000 miles link
4wheels: 2008 Z06. 31,000 miles link
80atez: 2008 Z06. 25,000 miles link
AZDANZ06: 2008 Z06. 27,000 miles link
banipal19: 2008 Z06. 9,000 miles link link2
bigdog1250: 2008 Z06. 31,000 miles link
big_mike_eu: 2008 Z06. 15,500 miles link
BignastyBRP: 2008 Z06. 38,000 miles link
bktmbill: 2008 Z06. 7,700 miles link
blkbrd69: 2008 Z06. 20,000 miles link
BosnianZ06: 2008 Z06. 24,000 miles link
bp2826: 2008 Z06. 52,000 miles link
Buddy A: 2008 Z06. 12,500 miles link
ClarksZ06: 2008 Z06. 9,000 miles link headers, cam, tune
conner.mcgrath: 2008 Z06. 47,000 miles link
Cozmo: 2008 Z06. 26,500 miles link
DaOtherOne: 2008 Z06. 35,000 miles link katech stage 1
ericszr1: 2008 Z06. 25,000 miles link
flyloeZ06: 2008 Z06. unknown miles link
Glenm27: 2008 Z06. 22,000 miles link tracked
HMFIC: 2008 Z06. unknown miles link
hot-toy: 2008 Z06. 13,500 miles link
JCox23: 2008 Z06. 10,500 miles link ferrea stainless valves (stock guides), cam, ported heads, intake, tb, headers
juanvaldez: 2008 Z06. 48,000 miles link
jwebsta32: 2008 Z06. 30,000 miles link
JP426: 2008 Z06. 17,736 miles link
Kneel 8250: 2008 Z06. 41,000 miles link Previous measurement at 34k miles showed in spec
Les: 2008 Z06. 26,900 miles link
londonk: 2008 Z06. 8,000 miles link
Mark Wade: 2008 Z06. 8,000 miles link
MHCvette: 2008 Z06. 12,567 miles link link2
Mike Hoppe: 2008 Z06. 11,000 miles link stock, intake and exhaust guides both out of spec
moose.b3: 2008 Z06. 40,000 miles link
mygiftmycurse: 2008 Z06. 22,800 miles link
MyLastCorvette: 2008 Z06. 9,000 miles link
Oskee: 2008 Z06. 10,000 miles link
property1: 2008 Z06. 18,000 miles video link link2
psp6158: 2008 Z06. 5,000 miles link
rapidroy: 2008 Z06. 18,000 miles link
SONKIST: 2008 Z06. 10,000 miles link
starr1: 2008 Z06. 17,000 miles link
timafey: 2008 Z06. 20,000 miles link
Titan C6Z: 2008 Z06. 13,900 miles link
vetteuphoria: 2008 Z06. 19,000 miles link
wolf8218: 2008 Z06. 23,000 miles link
yagrmiestr: 2008 Z06. 21,000 miles link
yrkZ06: 2008 Z06. 14,000 miles link
Z.06: 2008 Z06. 14,000 miles link
Zeaux6504: 2008 Z06. 20,000 miles link intake and exhaust out of spec
zman62: 2008 Z06. 4,000 miles link
-------------------------[2009]----------------------------------------
06HWRX: 2009 Z06. 17,500 miles link
1badtantrum: 2009 Z06. 14,300 miles link
71'AirStrike: 2009 Z06. 36,000 miles link
beden1: 2009 Z06. 6,400 miles link
chevybob: 2009 Z06. 10,000 miles link
CliffyDeuce: 2009 Z06. 19,000 miles link
cruzin2: 2009 Z06. 9,000 miles link
Dogged: 2009 Z06. 18,000 miles link
DON T.: 2009 Z06. 17,000 miles link
erick_e: 2009 Z06. 36,238 miles link
EWK: 2009 Z06. 7,666 miles link link2
EX1: 2009 Z06. 16,000 miles link link2 cam
jbs02somws6: 2009 Z06. 24,000 miles link cai
lawman34203: 2009 Z06. unknown miles link
LawrenceFromTorrence: 2009 Z06. 20,000 miles link
Maligator: 2009 Z06. 6,900 miles link
Mar48: 2009 Z06. 43,000 miles link
Mark200X: 2009 Z06. 50,000 miles link
Maxrr: 2009 Z06. 19,000 miles link
MHCvette: 2009 Z06. 30,642 miles link link2
morris: 2009 Z06. 32,000 miles link cam + track time
MTDave: 2009 Z06. 34,000 miles link
MyLs1Hauls: 2009 Z06. 10,000 miles link
nzk: 2009 Z06. 23,000 miles link
reasonable suspicion: 2009 Z06. 7,500 miles link link2
RegnaR: 2009 Z06. 22,000 miles link
rocksts: 2009 Z06. 19,000 miles link
stealth1281: 2009 Z06. 19,000 miles link
Wass: 2009 Z06. 45,000 miles link
wjnjr: 2009 Z06. 16,000 miles link link2 link3
-------------------------[2010]----------------------------------------
Gearpuller: 2010 Z06. 21,500 miles link
indyspeed: 2010 Z06. 5,743 miles link intake valve guides out of spec
oversteer: 2010 Z06. 7,500 miles link
roadandtrack: 2010 Z06. 7,500 miles link
Smkn 07: 2010 Z06. 34,000 miles link
-------------------------[2011]----------------------------------------
billyjo: 2011 Z06. 4,500 miles link
Dirty Howie: (2011 heads Z06). 32,000 miles link 2011 replacement motor
Minkster: 2011 Z06. 28,080 miles link
phipp85: 2011 Z06. 27,000 miles link intake valves guides out of spec
Z06_1: 2011 Z06. 16,000 miles link intake valve guides out of spec
-------------------------[2012]----------------------------------------
CGZ06: (2012 motor Z06). 400 miles link 2012 built replacement motor put in his '09 after original dropped valve
Hib Halverson: 2012 Z06. 15,000 miles link
-------------------------[2013]----------------------------------------
subfloor@centurytrans: 2013 Z06. <5,000 miles link supporting vendor, removed heads from 2013 Z06 with out of spec intake guides
-------------------------[427]----------------------------------------
garye: 2013 427 Vert. 4,000 miles link intake guides out of spec
Z06_1: 2013 427 Vert. 4,000 miles link intake guides out of spec
-----------------------------------------------------------------------
######################################## ###########
-----------------------------------------------------------------------
-----------------------------------------------------------------------
OUT OF SPEC LIST: (aftermarket bronze guides)
*3 Reported
American Heritage: unknown owner, year, mileage link link2 owner was told by previous owner heads were done by WCCH 20k miles prior
American Heritage: unknown owner, year, 15k miles on heads link link2 owner was told by previous owner that heads were done by WCCH 5k miles prior to sale. Car has unknown aftermaket cam
andy82: 2007 Z06. 7,000 miles on new PRC heads link
-----------------------------------------------------------------------
-----------------------------------------------------------------------
OUT OF SPEC LIST: (crate motor / LS7 swap in other vehicles)
*2 Reported
BillY2KFRC: 2008 built crate LS7. 23,000 miles link installed in C5 Z06
C5 LS7: 2006 built crate LS7. 35,000 miles installed in C5
-----------------------------------------------------------------------
01-16-2017, 11:59 AM
#445
Race Director
Your numbers are so small with this list there were thousands built, plus how many of these cars are modded and tracked, thats why GM is not doing **** !!! about this valve issue because most cars have been tracked hard and modded !!! and i will say it once again these are not sold as a RACE CAR PERIOD !!!!! I STICK WITH GM TO THE END !!!
For you rational guys out there, I suggest you ignore this guy rather than engage in a useless battle that could get a useful thread locked. He goes onto my Ignore List as of now.
The following users liked this post:
MTPZ06 (01-16-2017)
01-16-2017, 12:40 PM
#446
Team Owner
You have to be the most obtuse person I've seen here- or you're a straight up troll. You remind me of a guy who used to post in the C3 section. I don't think most of us ever knew for sure if he was really that stupid or if he was just a troll. It didn't matter- the mods finally got tired of his idiocy and banned him.
For you rational guys out there, I suggest you ignore this guy rather than engage in a useless battle that could get a useful thread locked. He goes onto my Ignore List as of now.
For you rational guys out there, I suggest you ignore this guy rather than engage in a useless battle that could get a useful thread locked. He goes onto my Ignore List as of now.
The following 2 users liked this post by MTPZ06:
1971 Judge (04-15-2017),
REDZED2 (01-16-2017)
01-16-2017, 06:50 PM
#447
Racer
You have to be the most obtuse person I've seen here- or you're a straight up troll. You remind me of a guy who used to post in the C3 section. I don't think most of us ever knew for sure if he was really that stupid or if he was just a troll. It didn't matter- the mods finally got tired of his idiocy and banned him.
For you rational guys out there, I suggest you ignore this guy rather than engage in a useless battle that could get a useful thread locked. He goes onto my Ignore List as of now.
For you rational guys out there, I suggest you ignore this guy rather than engage in a useless battle that could get a useful thread locked. He goes onto my Ignore List as of now.
01-16-2017, 07:43 PM
#448
BAND THIS !!! I have a right to state on any subject the way i feel again the numbers you have given have not stated if they where stock ls7 motors or tracked or outer mile ran or just somebody that just has done bad things to these motors, so until these numbers are well higher then what your short list has stated i still stand behind GM AND AGAIN THESE ARE NOT RACE CARS THEY WHERE NEVER SOLD TO BE RACE CARS.
01-16-2017, 07:56 PM
#449
Team Owner
Your numbers are so small with this list there were thousands built, plus how many of these cars are modded and tracked, thats why GM is not doing **** !!! about this valve issue because most cars have been tracked hard and modded !!! and i will say it once again these are not sold as a RACE CAR PERIOD !!!!! I STICK WITH GM TO THE END !!!
BAND THIS !!! I have a right to state on any subject the way i feel again the numbers you have given have not stated if they where stock ls7 motors or tracked or outer mile ran or just somebody that just has done bad things to these motors, so until these numbers are well higher then what your short list has stated i still stand behind GM AND AGAIN THESE ARE NOT RACE CARS THEY WHERE NEVER SOLD TO BE RACE CARS.
https://www.corvetteforum.com/forums...otor-work.html
01-16-2017, 09:02 PM
#450
Race Director
Well, then you should keep your car stock...why look into mod'ing it, if you know in your heart of hearts, that's what causes engine failure?
https://www.corvetteforum.com/forums...otor-work.html
https://www.corvetteforum.com/forums...otor-work.html
While I find his rant pretty humorous, I'd rather not have to see all of his poor spelling, lack of proper punctuation, and general incoherence. Using my special decoder to translate, I think he's a bit upset. Oooops. Whatever the case, if possible, could you guys try not to quote him? That way I won't have to suffer through his semi-literate posts. 
01-16-2017, 09:13 PM
#451
Team Owner
I certainly appreciate and agree with what you guys have to say. While I find his rant pretty humorous, I'd rather not have to see all of his poor spelling, lack of proper punctuation, and general incoherence. Using my special decoder to translate, I think he's a bit upset. Oooops. Whatever the case, if possible, could you guys try not to quote him? That way I won't have to suffer through his semi-literate posts.
While I find his rant pretty humorous, I'd rather not have to see all of his poor spelling, lack of proper punctuation, and general incoherence. Using my special decoder to translate, I think he's a bit upset. Oooops. Whatever the case, if possible, could you guys try not to quote him? That way I won't have to suffer through his semi-literate posts. 
Will do Les.
04-13-2017, 09:54 PM
#453
Intermediate
out of spec guide wear
2008 Z06, 9,620 miles, street driven, never on track, stock. Wiggle test done by American Heritage Performance.Valves were way out of spec per Kohle at AHP. Replaced heads with their Package 4, moldstar valve guides, Ferrea ss exhaust valves and street port. Engine kept stock. Heads were installed by Abel Chevrolet in Rio Vista, California. Excellent service and workmanship . Kohle at AHP was very helpful and easy to work with as was Donnell and Rich at Abel Chevrolet. Glad I had this done.
04-15-2017, 12:52 PM
#455
Melting Slicks
Member Since: Nov 2009
Location: Klein TX
Posts: 3,037
Received 906 Likes
on
570 Posts
2023 C6 of the Year Finalist - Unmodified
2022 C6 of the Year Finalist - Unmodified
Wow, I forgot all about this thread, good to see it's still going. I guess I need to post on it for a second time:
Warranty replacement heads failed the wiggle test and confirmed worn out by bore gauge measurements after approx. 15k mi. Similar mileage as the OE heads. This time I installed AHP rebuilt heads w/ moldstar 90 guides etc. etc. Hopefully these will last longer but I'll still check them after another 15K. to make sure.
Maybe we need start an out of spec guide registry for warranty replacements and other "fixed" heads that didn't stay fixed?
Warranty replacement heads failed the wiggle test and confirmed worn out by bore gauge measurements after approx. 15k mi. Similar mileage as the OE heads. This time I installed AHP rebuilt heads w/ moldstar 90 guides etc. etc. Hopefully these will last longer but I'll still check them after another 15K. to make sure.
Maybe we need start an out of spec guide registry for warranty replacements and other "fixed" heads that didn't stay fixed?
04-25-2017, 01:12 PM
#456
Instructor
2007 Z06, 24,000 miles, street driven, never tracked , stock. Wiggle test done by AHP. Valves were out of specs according to Kohle. Replaced with Package #4, added BTR Dual springs with titanium retainers and machined valve locks. Also had heads ported by AHP.
Below are your wiggle test measurements. Please not these are your raw wiggle test measurements. Your actual mic and bore gauge measurements will be roughly half of what the wiggle test measurements are.
#1 Int .008"
#1 exh .006"
#3 int .0085"
#3 exh .005"
#5 int .0085"
#5 exh .010"
#7 int .009"
#7 exh .005"
#2 int .010"
#2 exh .011"
#4 int .010"
#4 exh .012"
#6 int .008"
#6 exh .017"
#8 int .007"
#8 exh .006"
Max GM spec is .0037" which would roughly be .0075" on the wiggle test. So basiclly if the wiggle test is over .0075" the guides are out of spec.
Below are your wiggle test measurements. Please not these are your raw wiggle test measurements. Your actual mic and bore gauge measurements will be roughly half of what the wiggle test measurements are.
#1 Int .008"
#1 exh .006"
#3 int .0085"
#3 exh .005"
#5 int .0085"
#5 exh .010"
#7 int .009"
#7 exh .005"
#2 int .010"
#2 exh .011"
#4 int .010"
#4 exh .012"
#6 int .008"
#6 exh .017"
#8 int .007"
#8 exh .006"
Max GM spec is .0037" which would roughly be .0075" on the wiggle test. So basiclly if the wiggle test is over .0075" the guides are out of spec.
05-12-2017, 01:26 PM
#457
Burning Brakes
2013 427 w/4000 stock miles. Wiggle measurement were as follows;
#1 int: .010" #1exh: .009"
#2 int: .009" #2exh: .007"
#3 int: .012" #3exh: .008"
#4 int: .010" #4exh: .007"
#5 int: .010" #5exh: .008"
#6 int: .010" #6exh: .008"
#7 int: .010" #7exh: .008"
#8 int: .009" #8exh: .007"
A raw wiggle test of .009 or above will typically come back out of spec when measured with a dial bore and mic according to AHP. A raw wiggle of .008 and below will be in spec when measured with dial bore and mic.
#1 int: .010" #1exh: .009"
#2 int: .009" #2exh: .007"
#3 int: .012" #3exh: .008"
#4 int: .010" #4exh: .007"
#5 int: .010" #5exh: .008"
#6 int: .010" #6exh: .008"
#7 int: .010" #7exh: .008"
#8 int: .009" #8exh: .007"
A raw wiggle test of .009 or above will typically come back out of spec when measured with a dial bore and mic according to AHP. A raw wiggle of .008 and below will be in spec when measured with dial bore and mic.
Last edited by MH663; 05-12-2017 at 01:36 PM.
05-12-2017, 01:46 PM
#458
Team Owner
2013 427 w/4000 stock miles. Wiggle measurement were as follows;
#1 int: .010" #1exh: .009"
#2 int: .009" #2exh: .007"
#3 int: .012" #3exh: .008"
#4 int: .010" #4exh: .007"
#5 int: .010" #5exh: .008"
#6 int: .010" #6exh: .008"
#7 int: .010" #7exh: .008"
#8 int: .009" #8exh: .007"
A raw wiggle test of .009 or above will typically come back out of spec when measured with a dial bore and mic according to AHP. A raw wiggle of .008 and below will be in spec when measured with dial bore and mic.
#1 int: .010" #1exh: .009"
#2 int: .009" #2exh: .007"
#3 int: .012" #3exh: .008"
#4 int: .010" #4exh: .007"
#5 int: .010" #5exh: .008"
#6 int: .010" #6exh: .008"
#7 int: .010" #7exh: .008"
#8 int: .009" #8exh: .007"
A raw wiggle test of .009 or above will typically come back out of spec when measured with a dial bore and mic according to AHP. A raw wiggle of .008 and below will be in spec when measured with dial bore and mic.
Last edited by MTPZ06; 05-12-2017 at 01:47 PM.
05-12-2017, 02:17 PM
#459
Burning Brakes
05-14-2017, 09:39 AM
#460
Safety Car
You can add my 2009 @ 26,871 miles, to the list.
It's stock and has a GMPP on it, so it's not tracked. I took it in for a cam/lifters failure at Champion Chevrolet in Reno.
Once the heads were removed, they checked the valves/guides and found them out of spec.
My GMPP approved all the work/parts needed. It's getting a new set of heads and valves, cam, lifters and all parts cleaned, inspected and replaced as needed.
Here's the thread on it. https://www.corvetteforum.com/forums...-chirping.html
I don't know the measurements yet, as it's still being worked on. Hope to have more information late next week. I'll add anything further to the linked thread.
It's stock and has a GMPP on it, so it's not tracked. I took it in for a cam/lifters failure at Champion Chevrolet in Reno.
Once the heads were removed, they checked the valves/guides and found them out of spec.
My GMPP approved all the work/parts needed. It's getting a new set of heads and valves, cam, lifters and all parts cleaned, inspected and replaced as needed.
Here's the thread on it. https://www.corvetteforum.com/forums...-chirping.html
I don't know the measurements yet, as it's still being worked on. Hope to have more information late next week. I'll add anything further to the linked thread.