2008 Chevrolet Corvette Z06

The contact owns a 2008 Chevrolet Corvette. The contact stated that while driving out of his driveway, the "Service Active Handling System" warning light was illuminated. Neither the dealer nor an independent mechanic was made aware of the failure. The vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 75,600.

DEFECTIVE VALVE GUIDES. THIS FIRST HAPPENED AT 13,500 MILES, AND CHEVROLET DID REPLACE THE HEADS UNDER WARRANTY. NOW IT HAS HAPPENED AGAIN AT 28500 MILES AND I HAVE SPENT OVER $3100 IN PARTS ALONE TO FIX THE PROBLEM, WHICH HAS BEEN VERIFIED BY THE COMPANY WHO SOLD ME THE REPLACEMENT HEADS. I PROVIDED THE LABOR OR THE COST WOULD HAVE BEEN $1700 HIGHER. FOUR INTAKE VALVE GUIDES WERE BEYOND THE CHEVROLET REPLACEMENT SPEC AND ANOTHER FOUR WERE ALREADY AT THE CHEVROLET SERVICE LIMIT WITH ONLY 15000 MILES ON THE REPLACEMENT HEADS. OBVIOUSLY THE PROBLEM OCCURRED DURING CITY AND HIGHWAY DRIVING.

I BOUGHT MY 2008 Z06 BACK IN DECEMBER 2016 WITH 27000 MILES ON IT. LOVE THE CAR BUT FROM I UNDERSTAND READING ABOUT THE COMPLAINS FROM OTHER OWNERS IT HAS VALVE PROBLEMS AND THE CAN GIVE AWAY AT ANY TIME. DEAR GM I DON'T CARE HOW YOU TAKE THIS, BUT SHOULD MY 2008 LS7 MOTOR BREAK DOWN DUE TO THIS SPECIFIC SITUATION YOU WILL FIX IT AT YOUR OWN COST, I AM PRINTING THE COMPLAINS FROM THE FORUM ABOUT THE LS7 MOTOR ISSUES, AND IF THAT EVER HAPPENS TO MY CAR AND YOU REFUSE TO FIX IT, TV STATIONS, RADIO STATIONS, AND NEWS PAPERS WILL KNOW ABOUT THIS. LET ME CLEAR THIS IS A STATEMENT I AM MAKING THANK YOU

ENGINE IS MAKING A LOUD TICKING NOISE. SHOP RECOMMENDED TO REPLACE VALVE GUIDES AND REMACHINE CYLINDER HEADS. THIS IS TO PREVENT A VALVE DROPPING INTO THE ENGINE DUE TO OUT OF SPEC CYLINDER HEADS FROM THE OEM SUPPLIER. THIS IS A HIGH OCCURRENCE PROBLEM THAT HAS LOW OR REMOTE DETECTION METHODS. THE SEVERITY PRESENTS A POTENTIAL SAFETY/FIRE HAZARD.

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 9500 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.

THE 7L 427 ENGINE HAS A VALVE FAILURE PROBLEM. THE VALVE HEADS BREAK OFF INSIDE THE ENGINE WHILE RUNNING. THIS HAPPENED TO ME AS I WAS DRIVING ALONG A HIGHWAY AT 60 MILES PER HOUR NOT ACCELERATING BRAKING OR TURNING, IN A VERY REMOTE PART OF TEXAS. THE ENGINE SEIZED UP. THIS IS A KNOWN ISSUE BY GM WITH A MUCH HIGHER THAN EXPECTED FAILURE RATE YET HAS NEVER HAD A SERVICE BULLETIN NOR RECALL. THE CAR HAD 18,000 MILES ON IT AT THE TIME AND HAD NEVER BEEN TO THE TRACK OR ABUSED IN ANY WAY. OIL WAS CHANGED AT 3,000 MILE INTERVALS BY A CERTIFIED SHOP. BETWEEN TOWING AND REPAIR THE TOTAL BILL WAS OVER $ 16,000. BECAUSE THE CAR HAD BEEN IN SERVICE OVER 5 YEARS DESPITE THE LOW MILEAGE, GM PICKED UP ONLY 45% OF THE COSTS LEAVING ME WITH OVER A $ 10,000 BILL. THIS IS A HIGH PERFORMANCE VERY EXPENSIVE SPORTS CAR THAT HAD A COMPLETE ENGINE FAILURE AT 18,000 MILES. *TR

VEHICLE IS COMPLETELY STOCK WITH ONLY 18,000 MILES ON IT. IT HAS NEVER BEEN ON A TRACK OR USED FOR ANYTHING OTHER THAN A WEEKEND TOY. COMPLETE ENGINE FAILURE AS A RESULT OF A VALVE BREAKING OFF INSIDE THE ENGINE WHILE DRIVING CASUALLY AT 50 MPH. AS A RESULT THE ENGINE STOPPED RUNNING TAKING WITH IT THE POWER STEERING AND POWER ASSISTED BRAKES. I WAS ON A COUNTRY ROAD APPROXIMATELY 45 MILES FROM THE NEAREST GAS STATION OR SERVICE FACILITY OF ANY KIND. THERE WAS ALSO NO CELL PHONE SERVICE AND WAS LEFT STRANDED. I HAVE SINCE HAD A BRAND NEW ENGINE PUT IN AT A TOTAL COST OF OVER $ 16,000.