2007 CHEVROLET CORVETTE Z06 Engine Problems

THE HEAD ISSUE VALVE GUIDE ON THE HEADS WAS COMPLETELY OUT OF SPEC....HAVE REPAIRED CAR TWICE BECAUSE OF THIS ISSUE '.

Mileage: 64,000

DANGEROUS CONDITIONS. EXHAUST VALVE DESIGN CAUSES EAR THAT EVENTUALLY BREAKS EXHAUST VALVE AND DESTROYS ENGINE. EXHAUST VALVE LOOSE ENOUGH TO BREAK AND CAUSE ENGINE DAMAGE, POSSIBLE FIRE AND/OR FLAMMABLE FLUID LEAKAGE. HTTPS://WWW.YOUTUBE.COM/WATCH?V=WTOA3VLGOES

Mileage: 88,000

MY 10,000 MILE 2007 HEADS ARE AT AHP FOR REBUILDING. THEY REPORTED BACK THAT 1 EXHAUST AND 3 INTAKE GUIDES WERE WORN PAST THE SERVICE LIMIT. SEVERAL OTHERS WERE CLOSE OR AT THE LIMIT.

Mileage: 10,350

'TAKATA RECALL' JUST BOUGHT A 2007 Z06 CORVETTE AND LATELY I'VE BEEN SEEING A LOT OF COMPLAINTS ABOUT THE VALVE STEMS BREAKING AND CAUSING CATASTROPHIC ENGINE FAILTURE CAUSING THE POWER STEERING AND BREAKS TO FAIL SO NOW I HAVE TO PAY 5000.00 + TO GET IT SERVICED AND EVERY 10K MILES DO THE SAME THING BECAUSE THE VALVE STEM AND GUIDES GET HOT AND START TO WIGGLE

Mileage: 59,000

AT 65MPH, DRIVING DOWN THE HIGHWAY, THE CAR MADE A HORRENDOUS LOUD CLATTERING SOUND AND THE MOTOR LOCKED UP. PULLED TO THE SIDE OF THE ROAD TO SEE OIL POURING OUT THE SIDE OF THE ENGINE BLOCK, WHERE THE VALVE WAS SPIT OUT - CAUSING A HUGE HOLE IN THE SIDE OF THE MOTOR

Mileage: 21,000

MY 2007 CHEVROLET CORVETTE Z06 DROPED A VALVE WHILE I WAS DRIVING HOME. I WAS ON A REGULAR 45MPH SPEED LIMIT ROAD IN TRAFFIC WHEN I REALIZED THE CAR WAS LOSING POWER AND QUICKLY PULLED ON THE SIDE OF THE ROAD BECAUSE THERE WERE CARS IN FRONT AND BEHIND ME. LUCKILY NOBODY WAS HURT BUT IF I HAD BEEN ON A HIGHWAY IN THE MIDDLE LANE SOMEONE COULD HAVE LOST THEIR LIFE INCLUDING ME. FROM THE SECOND I REALIZED THE CAR WAS LOSING POWER TO THE POINT THE ENGINE SHUT OFF WAS A MATTER OF 5 SECONDS MAYBE. AFTER DOING MUCH RESEARCH ONLINE I FOUND OUT THERE IS A VERY COMMON PROBLEM WITH VALVE GUIDES BEING OUT OF SPEC IN THIS MODEL CORVETTE.

Mileage: 60,000

#1 AZDANZ06'S AVATARAZDANZ06 , 01-06-2015 11:27 AM LINK TO FILE COMPLAINT: HTTPS://WWW-ODI.NHTSA.DOT.GOV/VEHICL...NT/INDEX.XHTML I JUST FILED A COMPLAINT WITH THE NHTSA ABOUT THE OUT OF SPEC VALVE GUIDE ISSUE, I WOULD ENCOURAGE EVERYONE ELSE TO DO SO AS WELL, MAYBE JUST MAYBE IT WILL FORCE GM TO FINALLY DO A RECALL AND QC ON PARTS. HERE IS MY COMPLAINT: I WAS CONCERNED ABOUT EXCESSIVE VALVE TRAIN NOISE AND AFTER READING SEVERAL CORVETTE FORUM THREADS ABOUT IMPROPERLY MACHINED HEADS BY GM'S SUPPLIER LINAMAR, AND THAT NUMEROUS VEHICLES HAVE HAD VALVES DROP AND RUIN THE ENGINES, 88% OF THE CORVETTE FORUM MEMBERS WHO HAVE HAD THEIR CYLINDER HEADS TESTED FOR EXCESSIVE VALVE GUIDE WEAR, WERE OUT OF SERVICE SPECIFICATIONS. SOURCE: HTTPS://WWW.CORVETTEFORUM.COM/FORUMS...-REGISTRY.HTML GM NEEDS TO ISSUE A RECALL ON THIS ISSUE, THERE HAVE BEEN NUMEROUS ENGINE FAILURES AS A RESULT OF A DROPPED VALVE INTO A CYLINDER WHICH CAN CAUSE ACCIDENTS AND FIRES. GM IS VERY AWARE OF THIS ISSUE, BUT REFUSES TO DO ANYTHING ABOUT THIS HUGE SAFETY RISK TO DRIVERS, PASSENGERS, AND NEARBY VEHICLES IF THE ENGINE FAILS GOING DOWN THE ROAD. #2 WHIS9'S AVATARWHIS9 , 01-06-2015 11:39 AM

Mileage: 42,000

VALVE BROKE AND LOCKED UP ENGINE. CAR SKIDDED OFF HIGHWAY AND WAS DESTROYED. I WAS DRIVING ON INTERSTATE AND IT WAS RAINING. NO INDICATION OF PROBLEM BEFORE EVENT

Mileage: 9,655

I'VE READ SEVERAL DIFFERENT POSTS ABOUT PEOPLE WITH 2007 CORVETTES HAVING PROBLEMS WITH VALVES AND DROPPING VALVES AND LOSING CONTROL WHEN THIS BECAUSE OF THE POWER STEERING AND BRAKES NOT WORKING WHEN THIS HAPPENS. I BOUGHT MY 2007 CORVETTE Z06 NEW BACK IN 2007 AND I'VE ALWAYS NOTICED VALVE NOISE AND LATELY IT SEEMS A LITTLE LOUDER. I HEAR THE VALVE NOISE MOSTLY DRIVING IT IN TOWN. I'M NOT SURE IF I SHOULD JUST WAIT FOR THE VALVES TO FAIL AND TAKE MY CHANCES OR PAY TO HAVE SOMEONE TO PULL THE HEADS AND CHECK ALL THE VALVES AND REPAIR ANY ONES THAT ARE OUT OF SPECIFICATION. SO I THINK IT'S GM'S RESPONSIBILITY TO DO A RECALL FOR THIS BECAUSE IN MY OPINION THIS IS A DEFECT AND IT WOULD BE VERY DANGEROUS TO DROP A VALVE AND LOSE CONTROL OF MY CAR. I SPENT A LOT OF MONEY ON THIS CAR AND I JUST DON'T FEEL I SHOULD NEED TO PAY ANYMORE MONEY TO DIAGNOSE AND FIX THIS PROBLEM. MY HEADLIGHTS STOPPED WORKING TONIGHT AND LUCKILY THERE IS A RECALL FOR THAT PROBLEM.

Mileage: 500

I WAS CONCERNED ABOUT EXCESSIVE VALVE TRAIN NOISE AND AFTER READING SEVERAL CORVETTE FORUM THREADS ABOUT IMPROPERLY MACHINED HEADS BY GM'S SUPPLIER LINAMAR, AND THAT NUMEROUS VEHICLES HAVE HAD VALVES DROP AND RUIN THE ENGINES, I TOOK MY CAR WITH 27000 MILES ON IT TO A CORVETTE SPECIALTY SHOP TO HAVE MY VALVE GUIDE CLEARANCE TESTED. I HAD (2) INTAKE VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, (4) EXHAUST VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, AND A COMBINATION OF (10) OTHER INTAKE AND EXHAUST VALVE GUIDES AT OR NEAR THE MAXIMUM OUTSIDE OF SERVICE SPECIFICATIONS. THE CAR IS BEING REPAIRED WITH PROPER RE-MACHINING OF THE HEADS TO MAKE THE VALVE GUIDES CONCENTRIC, NEW INTAKE AND EXHAUST VALVE GUIDES INSTALLED, AS WELL AS NEW SEALS, VALVES, SPRINGS, ETC. 88% OF THE CORVETTE FORUM MEMBERS WHO HAVE HAD THEIR CYLINDER HEADS TESTED FOR EXCESSIVE VALVE GUIDE WEAR, WERE OUT OF SERVICE SPECIFICATIONS. SOURCE: HTTP://WWW.CORVETTEFORUM.COM/FORUMS/...-REGISTRY.HTML GM NEEDS TO ISSUE A RECALL ON THIS ISSUE, THERE HAVE BEEN NUMEROUS ENGINE FAILURES AS A RESULT OF A DROPPED VALVE INTO A CYLINDER WHICH CAN CAUSE ACCIDENTS AND FIRES. GM IS VERY AWARE OF THIS ISSUE, BUT REFUSES TO DO ANYTHING ABOUT THIS HUGE SAFETY RISK TO DRIVERS, PASSENGERS, AND NEARBY VEHICLES IF THE ENGINE FAILS GOING DOWN THE ROAD.

Mileage: 24,000

THE EXHAUST VALVE BROKE OFF, AND ENGINE BLEW UP. I WAS DRIVING ON HIGHWAY.

Mileage: 35,995

I AM EXTREMELY CONCERNED ABOUT EXCESSIVE VALVE TRAIN NOISE AND AFTER READING SEVERAL CORVETTE FORUM THREADS ABOUT IMPROPERLY MACHINED HEADS BY GM'S SUPPLIER LINAMAR, AND THAT NUMEROUS VEHICLES HAVE HAD VALVES DROP AND RUIN THE ENGINES CAUSING A LOSS OF CONTROL OF THE VEHICLE DUE TO THE ENGINE STOPPING ABRUPTLY. 88% OF THE CORVETTE FORUM MEMBERS WHO HAVE HAD THEIR CYLINDER HEADS TESTED FOR EXCESSIVE VALVE GUIDE WEAR, WERE OUT OF SERVICE SPECIFICATIONS. SOURCE: HTTP://WWW.CORVETTEFORUM.COM/FORUMS/C6-Z06-DISCUSSION/3386141-THE-OUT-OF-SPEC-GUIDE-WEAR-REGISTRY.HTML GM NEEDS TO ISSUE A RECALL ON THIS ISSUE, THERE HAVE BEEN NUMEROUS ENGINE FAILURES AS A RESULT OF A DROPPED VALVE INTO A CYLINDER WHICH CAN CAUSE SEVERE ACCIDENTS AND FIRES. GM IS VERY AWARE OF THIS ISSUE, BUT REFUSES TO DO ANYTHING ABOUT THIS HUGE SAFETY RISK TO DRIVERS, PASSENGERS, AND NEARBY VEHICLES IF THE ENGINE FAILS GOING DOWN THE ROAD. IT HAS BEEN NOTED ON THE FORUM THAT GM IS VERY AWARE OF THE ISSUES AND I ASSUME THEY THINK NO ONE WILL REPORT THEM FOR NOT HANDLING IT CORRECTLY. THE ISSUE IS THIS IS A CRITICAL SAFETY ISSUE FOR ANYONE DRIVING A 06-13 Z06 MODEL ON THE ROAD. I AM TO THE POINT I DON'T FEEL SAFE TO DRIVE MY VEHICLE ANYMORE DUE TO THE LOUD 'TICKING' VALVE-TRAIN AS IT IS (SYMPTOM) MEANING IT IS LIKELY TO FAIL AT ANY MOMENT SEIZING THE ENGINE WHILE ON THE ROAD. I HAVE WAITED ON GM FOR 6 YEARS TO DO THE CORRECT THING ON THEIR OWN BUT I AM NOW REPORTING IT DUE TO THEIR GROSS NEGLIGENCE AND DISREGARD OF THEIR CUSTOMERS SAFETY.

Mileage: 28,100

WHILE DRIVING ON THE ROAD AT APROX. 45MPH, MY CAR EXHAUST VALVE DROPPED IN THE MOTOR CAUSING IMMEDIATE ENGINE FAILURE ALSO CREATING POWER STEERING AND POWER BRAKES TO STOP WORKING IMMEDIATELY. THIS SAME EXHAUST VALVE ISSUES OCCURRED WITH MANY OTHER GM CORVETTES WITH THE 7.0LITER Z06 MOTOR.

Mileage: 33,000

VALVE TRAIN ROCKER ARMS BROKEN LEAVING NEEDLE BEARINGS IN THE OIL, AND ALL VALVE GUIDES WERE OUT OF TOLERANCE. *TR

Mileage: 36,500

AFTER MONTHS OF READING ABOUT THE EXHAUST VALVE ISSUE WITH CORVETTE Z06S I TOOK MY CAR AND HAD THE HEADS CHECKED. THE SHOP FOUND THE VALVE GUIDE CLEARANCE TO BE OUTSIDE THE SPECIFIED ACCEPTABLE RANGE. THE DEFECT PUTS UNDUE STRESS ON THE SODIUM FILLED VALVES AND IF THE VALVE FAILS IT CAN CAUSE CATASTROPHIC ENGINE DAMAGE AND POTENTIALLY DEADLY SITUATION IF THIS OCCURS AT SPEED ON THE ROADWAY AS THE DRIVER WILL LOSE ABILITY TO CONTROL THE VEHICLE POTENTIALLY CAUSING A DEADLY ACCIDENT. I PAID SEVERAL THOUSAND DOLLARS OUT OF POCKET TO FIX THIS ISSUE DESPITE GM ACKNOWLEDGING THERE IS AN ISSUE WITH THESE VEHICLES.

Mileage: 83,000

WIGGLE TEST ON ALL VALVES SHOWED ALL EXHAUST VALVES WITH EXCESSIVE GUID WHERE....SAFETY ISSUE....!!! THIS CAN AND HAS LED TO CATASTROPHIC ENGINE FAILURE AT FREEWAY SPEEDS....... *TR

Mileage: 33,720

THIS MODEL CORVETTE CAN SUDDENLY DROP AN ENGINE VALVE (EXHAUST OR INTAKE) AND UNEXPECTEDLY DEVELOP A HOLE IN THE BLOCK ACCOMPANIED WITH OIL SPILLED ON THE ROADWAY, SMOKE BILLOWING WITH RISK FOR VEHICLES BEHIND AND IN FRONT, AND THE RISK FOR TOTAL LOSS OF POWER STEERING, BRAKING AND CONTROL OF THE VEHICLE. THE OUTCOME IF THIS HAPPENED ON A FREEWAY WITH CARS TRAVELING AT A HIGH RATE OF SPEED IS POTENTIALLY FATAL. ALL OF THIS IS DUE TO MACHINING ERRORS AND SUPPLIER DEFECTS FOR THE ASSOCIATED PARTS (VALVES, GUIDES, ETC.) ON ALL 2006-2013 CORVETTE C6 Z06'S MADE BY GM. *TR

Mileage: 18,000

I TOOK MY CAR TO AMERICAN HERITAGE PERFORMANCE IN CALIFORNIA AND HAD THE HEADS CHECKED AND THEY WERE ALL OUT OF SPECK, AT 16000 MILES, AND THIS CAR WAS ONLY STREET DRIVEN, AND HAD TO HAVE ALL THIS WORK DONE ON A LOW MILEAGE CAR WAS VERY UPSETTING, AND IN THE END FINDING OUT THAT MANY CARS HAVE THIS PROBLEM. HAVING TO GET ALL THIS WORK DONE ON A VIRTUALLY NEW CAR IS RIDICULOUS.. *TR

Mileage: 16,000

WHEN I PURCHASED THE 2007 CORVETTE Z06, I WAS INSTRUCTED TO HAVE THE HEADS CHECKED FOR EXCESSIVE VALVE GUIDE WEAR. I HAD THE HEADS PULLED AND THE VALVES EXAMINED BY A LOCAL EXPERT. HE INDICATED THAT THE VALVE GUIDES WERE OUT OF SPECIFICATION AND NEEDED REPLACEMENT. I REPLACED THESE AT MY OWN EXPENSE OF OVER $2000.00. HAD THE ENGINE BLOWN UP AS A RESULT OF THIS DEFECTIVE CONDITION, THE BREAKS AND POWER STEERING WOULD FAIL CAUSING AN ACCIDENT. I WOULD LIKE GM TO ISSUE A RECALL ON THIS MODEL CORVETTE. *TR

Mileage: 43,000

ABNORMAL VALVE GUIDE WEAR IN CYLINDER HEADS CONSIDERING AGE AND MILEAGE OF VEHICLE. POTENTIAL CATASTROPHIC ENGINE FAILURE FROM DROPPED VALVE IF NOT ADDRESSED. CHEVROLET SHOULD FIX WHETHER VEHICLE STILL IN WARRANTY OR NOT AS IS BELIEVED TO BE POOR QUALITY CONTROL RESULTING IN MACHINING ERRORS. *TR

Mileage: 20,243

AT ONLY 21,179 MILES, MY DEALER INSPECTED BOTH CYLINDER HEAD BANKS AND FOUND VALVE GUIDE CLEARANCE TO BE WELL OUT OF MAXIMUM ALLOWED SPECIFICATION. THIS DEFECT PUTS UNDUE STRESS ON THE HOLLOW, SODIUM-FILLED EXHAUST VALVES. IF AN EXHAUST VALVE BREAKS, THE EXHAUST VALVE WILL DROP INTO THE COMBUSTION CHAMBER, AND CAUSE A COMPLETE, CATASTROPHIC FAILURE OF THE ENGINE. THIS CAUSES HAZARDOUS CONDITIONS FOR THE DRIVER, PASSENGER, AND SURROUNDING TRAFFIC: THE DRIVE WHEELS MAY BECOME LOCKED AS THE ENGINE SEIZES AND THE ENGINE BLOCK MAY BECOME WINDOWED BY A ROD, CAUSING A LARGE SPILL OF OIL AND COOLANT IMMEDIATELY UNDER THE VEHICLE ON THE ROADWAY. THESE CONDITIONS COULD LEAD TO A SEVERE ACCIDENT FROM A SUDDEN SPIN AND/OR A FIRE. I HAVE LITTLE CONFIDENCE THAT THE CYLINDER HEADS REPLACED ON MY CAR ARE FREE FROM THE VALVE GUIDE CLEARANCE DEFECT. AS MORE OWNERS HAVE BECOME AWARE OF THE PROBLEM, REPLACEMENT CYLINDER HEADS HAVE BEEN MEASURED BEFORE INSTALLATION ON THE ENGINE AND HAVE BEEN FOUND TO HAVE DEFECTS IN VALVE GUIDE CLEARANCE AND VALVE GUIDE TO SEAT CONCENTRICITY, SUCH AS WHAT COULD LEAD TO A DROPPED EXHAUST VALVE AND AN ACCIDENT. THE VEHICLES SHOULD BE RECALLED AND FIXED BEFORE ANY MORE SERIOUS ACCIDENTS OCCUR. ALTHOUGH MY VEHICLE DID NOT FAIL DESPITE HAVING THE DEFECT, I HAVE SEEN A VIDEO OF A SPIN CAUSED BY THE FAILURE, I HAVE SEEN PICTURES OF A VEHICLE AFTER A FIRE CAUSED BY THE FAILURE, AND I HAVE SEEN REPORTS OF APPROXIMATELY 35 FAILURES; ALL FROM CORVETTEFORUM.COM. THEREFORE I AM CONCERNED ABOUT MY SAFETY WHEN DRIVING THE VEHICLE AND I BELIEVE THE NHTSA SHOULD INVESTIGATE THE MATTER. *TR

Mileage: 21,179

MY CYLINDER HEAD INTAKE AND EXHAUST VALVES WERE SEVERELY OUT OF GM'S .0037" MAXIMUM WIGGLE TOLERANCE. THE VALVES WERE TESTED BY YUMA AUTO AND TRANS AS WELL AS AMERICAN HERITAGE PERFORMANCE (HARBOR CITY, CA). NOT ADDRESSING THE ISSUE MAY HAVE CAUSED A DROPPED CYLINDER VALVE AND BLOWN ENGINE.

Mileage: 18,000

EXHAUST VALVE BROKE DUE TO VALVE GUIDES BEING OUT OF SPEC. ENGINE SEIZED. IMMEDIATE LOSS OF POWER STEERING AND BRAKES DUE TO SEIZED ENGINE.

Mileage: 37,000

SUBMISSION FROM CONSTITUENT RE REPAIRS ON HIS 2007 CHEVROLET CORVETTE (THE ENGINE "DROPPED A VALVE") *SMD THE CONSUMER WAS INFORMED, THE ENTIRE ENGINE NEEDED TO BE REPLACED AT A COST OF $18,722. INSTEAD OF REPLACING THE ENGINE, AT NO COST TO THE CONSUMER, GENERAL MOTORS OFFERED TO PICK UP 45% OF THE COST, LEAVING THE CONSUMER TO PAY THE BALANCE OF $10,630. THE CONSUMER STATED GM ISSUED AN INTERNAL BULLETIN AS FAR BACK AS FEBRUARY 2008, THAT SHOWED THEY WERE AWARE OF THE Z06 ENGINE FAILURES AND SHORT LIFE EXPECTANCY.

Mileage: 51,617

EXHAUST VALVE GUIDES ARE EXCESSIVELY WORN BEYOND SERVICE LIMIT. APPROXIMATELY 4 TIMES SERVICE LIMIT. THIS IS A DEFINITE SAFETY HAZARD TO ME AND TO THOSE AROUND ME. THE WORN VALVE GUIDE CAUSES THE EXHAUST VALVE TO STRETCH, AND EVENTUALLY BREAK. WHEN THE VALVE HEAD BREAKS, IT BEATS ITS WAY OUT OF THE ENGINE, CAUSING POTENTIALLY: ENGINE LOCKUP, OIL SPILL ON HIGHWAY, LARGE SMOKE CLOUD AND DEBRIS OUT THE REAR OF THE VEHICLE. LOSS OF CONTROL OF THE VEHICLE IMMINENT DANGER TO THOSE AROUND ME DUE TO LOSS OF VISION AND SLIPPERY ROADWAY. THIS ISSUE AFFECTS ALL 2006 TO 2013 CHEVROLET CORVETTE Z06. *TR

Mileage: 16,000

IT IS STOCK AND NO TUNE VERIFIED BY ( RELIABLE CHEVROLET IN SPRINGFIELD MO. AND SHOW-ME SPEED IN NIXA MO.) AT 49562 MILE IT DROP THE #6 EXHAUST VALVE WHICH IN TURN DESTROYED THE MOTOR I HAVE HAD THIS CAR TO 3 DIFFERENT SHOPS AND THEY ARE ALL SAYING THE SAME THING EXCESSIVE WEAR ON ALL THE EXHAUST VALVE GUIDES 2 OF THE SHOPS DETERMINED THIS WEAR CAUSED THE EXHAUST VALVE TO BREAK OTHER SHOP COULDN'T SAY. *TR

Mileage: 49,562