2009 Chevrolet Corvette Engine Problems

Fuel pump / Fuel tank Cracks due to bad plastic use by GM

NHTSA ID

11507721

Incident

Feb 16, 2023

I HAD A VALVE DROP AND THREW A ROD THRU MY ENGINE TRAVELING AT HIGHWAY SPEEDS ON A BUSY HIGHWAY. I LOST ENGINE POWER, POWER STEERING, AND SPILLED OIL AND OTHER CHEMICALS ONTO THE ROADWAY. A THICK CLOUD OF SMOKE BILLOWED FROM UNDERNEATH AND OUT THE BACK OF THE CAR MAKING IT UNSAFE FOR CARS TRAVELING BEHIND ME. THE DEALER WHO HAS SINCE INSPECTED MY CAR HAS STATED IT IS A KNOWN ISSUE THAT THE "LIFTERS ARE WEAK". AFTER QUITE A BIT OF READING, IT APPEARS MANY OTHER OWNERS OF THE SAME CAR HAVE EXPERIENCED A MULTITUDE OF ISSUES WITH VALVES, LIFTERS, HEADS, ETC. GM IS AWARE OF FAULTY PARTS BUT I CANNOT FIND ANY NOTICE OF RECALLS. MAKE/MODEL: 2009 CORVETTE Z06; ENGINE: LS7. *TR

NHTSA ID

11329555

Incident

Jun 2, 2020

Mileage

56,000 mi

VALVES WERE OUT OF SPEC IT CAME FROM THE FACTORY THIS WAY

NHTSA ID

11326711

Incident

Aug 22, 2012

VALVE GUIDE MEASUREMENTS WERE OUT OF SPECIFICATIONS AT 5K MILES

NHTSA ID

11323888

Incident

Feb 16, 2015

Mileage

5,000 mi

MY ENGINE EXPERIENCED VALVE GUIDE FAILURE WHILE DRIVING WHICH RESULTED IN A COMPLETE LOSS OF POWER AND SPILLED OIL ALL OVER THE ROAD. THE ENTIRE ENGINE WAS DESTROYED. IF I HAD NOT BEEN ABLE TO PULL OVER SAFELY IT COULD HAVE BEEN VERY DANGEROUS. *TR

NHTSA ID

11323493

Incident

Apr 6, 2018

Mileage

35,000 mi

I EXPERIENCED AN ENGINE FAILURE. THIS RESULTED IN A SUDDEN AND COMPLETE LOSS OF POWER AT AN UNEXPECTED TIME. THIS OCCURRED DURING A HIGH PERFORMANCE DRIVER EDUCATION EVENT AT AUTO CLUB SPEEDWAY IN FONTANA, CA. THERE WAS NO WARNING BEFORE THE MOMENT THE ENGINE FAILED. THE CAUSE OF THE FAILURE WAS THE HEAD OF ONE OF THE EXHAUST VALVES SEPARATED FROM THE VALVE STEM AND FELL INTO THE CYLINDER, DESTROYING THE CYLINDER HEAD, PISTON AND CYLINDER WALL. THE ENGINE MODEL IN MY 2009 CORVETTE IS THE LS7. A GOOGLE SEARCH ON 'LS7 DROPPED VALVES' WILL FILL MANY PAGES.

NHTSA ID

11318640

Incident

Sep 15, 2013

Mileage

30,133 mi

VALVE GUIDES WORN - ALL- OUT OF SPECIFICATION AT 30K MILES, HEADS REMOVED AND VALVE GUIDES AND EXHAUST VALVES REPLACED.

NHTSA ID

11163594

Incident

Oct 1, 2018

Mileage

30,000 mi

FUEL LEAK

NHTSA ID

11118208

Incident

Aug 6, 2018

Mileage

34,000 mi

HAD TO HAVE CYLINDER HEADS REBUILT BECAUSE MANUFACTURING ISSUE WITH VALVE GUIDS WEARING QUICKLY OUT OF SPEC AND IF NOT CORRECTED DESTROYING THE ENTIRE MOTOR. I GOT A CHECK ENGINE LIGHT WITH MISFIRE WHICH WAS CAUSED BY WORN GUIDES. SENT HEADS INTO BE REBUILT AND FOUND OUT THAT THEY WERE WAY OUT OF SPEC. SOME AT .030 AND SPEC CUT OFF AT .006

NHTSA ID

11093588

Incident

Jan 1, 2018

Mileage

95,000 mi

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: 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.

NHTSA ID

11072973

Incident

Feb 14, 2018

REGARDING THE CYLINDER HEADS, I AM ONE OF HUNDREDS THAT EXPERIENCED INTAKE AND EXHAUST VALVES THAT WERE OUT OF SPECIFICATION DUE TO INADEQUATE CYLINDER HEAD DESIGN AND VALVE GUIDES. AS A RESULT, I NEEDED TO HAVE MY HEADS REPLACED WITH REBUILT HEADS AND NEW VALVE GUIDES. THE UPLOADED DOCUMENT HIGHLIGHTS THE MEASUREMENTS ON THE VALVES AS BEING OUT OF SPECIFICATION AFTER THEY WERE TESTED UPON REMOVAL FROM MY VEHICLE. ON AN ENGINE WITH ONLY 11,000 MILES AT THE TIME, THIS IS ALARMING. HUNDREDS OTHERS HAVE EXPERIENCED THE SAME DEFECT. THIS IS A SAFETY ISSUE AS WHEN A VALVE DROPS, IT FALLS INTO THE ENGINE HAVING THE EFFECT OF POTENTIALLY IMMEDIATELY SEIZING IT UP WHICH WOULD THEN CAUSE THE CAR TO LOCK THE REAR WHEELS AND LOSE CONTROL

NHTSA ID

11071992

Incident

Jul 19, 2017

Mileage

11,000 mi

ALTHOUGH MY CAR IS A 2009 IT ONLY HAS 300 MILES ON IT. THE ZO6 MODEL WHICH HAS THE "LS7 ENGINE HAS A KNOWN VALVE ISSUE WITH BOTH INTAKE AND EXHAUST BEING OUT OF SPEC AND WEARING RAPIDLY. I HAD A "WIGGLE TEST" DONE ON ALL MY VALVES. MORE THAN HALF OF THE 16 VALVES WERE OUT OF SPEC. IF THE ISSUE IS NOT CORRECT A VALVE WILL DROP AND A NEW ENGINE WILL BE REQUIRED.

NHTSA ID

11051354

Incident

Nov 29, 2017

Mileage

300 mi

ENGINE VALVE TRAIN SUBJECT TO COMPLETE FAILURE DUE TO IMPROPER MANUFACTURE CAUSING A TOTAL ENGINE FAILURE AN POSSIBLE LOSS OF CONTROL AT SPEED.

NHTSA ID

10968674

Incident

Oct 25, 2016

I WAS CONCERNED ABOUT EXCESSIVE VALVE TRAIN NOISE AND AFTER READING SEVERAL CORVETTE FORUM THREADS AND SPEAKING TO NUMEROUS CHEVROLET MECHANICS ABOUT IMPROPERLY MACHINED HEADS BY GM'S SUPPLIER LINAMAR, AND THAT NUMEROUS VEHICLES HAVE HAD VALVES DROP AND RUIN THE ENGINES. THIS HAS HAPPENED ON COMPLETELY STOCK VEHICLES. PEOPLE WITH LESS THAN 20000 MILES HAVE LOST MOTORS. 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. IF THE ENGINE FAILS DUE TO DROPPING A VALVE, THE ENGINE WILL IMMEDIATELY SHUT OFF, WHICH CUTS OFF POWER STEERING AND POWER BRAKING. THIS IS A VERY HUGE SAFETY CONCERN.

NHTSA ID

10955020

Incident

Feb 16, 2017

VALVE GUIDE ISSUE CAUSING FAILURE TO BRAKES, AND POWER STEERING, AS WELL AS ENGINE BLOWING

NHTSA ID

10903195

Incident

Sep 2, 2016

Mileage

7,500 mi

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 37,000 MILES ON IT TO COURTESY CHEVROLET / CADILLAC TO HAVE MY VALVE GUIDE CLEARANCE TESTED. I HAD (3) INTAKE VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, (7) EXHAUST VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, AND A COMBINATION OF (11) OTHER INTAKE AND EXHAUST VALVE GUIDES AT OR NEAR THE MAXIMUM OUTSIDE OF SERVICE SPECIFICATIONS. THE COST OF 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. IS SOMETHING I SIMPLY CANNOT AFFORD AT THE MOMENT WITH THE DOWNTURN OF THE OILFIELD INDUSTRY. PLEASE BEAR IN MIND, MY CAR HAD A REPLACEMENT LS7 ENGINE FROM A DROPPED EXHAUST VALVE BEFORE I OWNED IT, SO THIS HAS ALREADY HAPPENED TO MY CAR ONCE. IT OCCURRED AT 22XXX MILES, AND CAN HAVE THE GM DEALER PRINT A COPY OF THE RO LINE TO PROVE IT. THIS IS OCCURRING AT AN ALARMING RATE, BUT AFTER OUR WARRANTY PERIOD, WE THE CONSUMER ARE LEFT OUT TO DRY. 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. PLEASE ASSIST US IN HAVING GM MAKE THIS RIGHT.

NHTSA ID

10861934

Incident

Mar 9, 2016

Mileage

37,000 mi

GM DENIES ANY SORT OF WIDE SPREAD ISSUE WITH RESPECT TO THE MANUFACTURING/ASSEMBLY OF THE CYLINDER HEADS FOR THE LS7 ENGINE. THERE HAVE BEEN NUMEROUS CATASTROPHIC ENGINE FAILURES AS A RESULT OF A BROKEN VALVE HEAD DROPPING INTO THE CYLINDER AND SUBSEQUENTLY BLOWING A HOLE THROUGH THE MOTOR, CAUSING FLUIDS TO LEAK ALL OVER THE ROAD, AND COMPLETE LOSS OF CONTROL OF THE VEHICLE. THE SYMPTOMS ARE PREMATURE VALVE GUIDE WEAR, WHICH EVENTUALLY BECOME SO WORN THAT THE VALVE CLOSES ON THE WRONG ANGLE TO THE SEAT, AND OFF BREAKS THE VALVE HEAD. THE ISSUE APPEARS TO BE POOR VALVE GUIDE TO VALVE SEAT CONCENTRICITY, WHICH LEADS TO PREMATURE VALVE GUIDE WEAR. MY 2009 Z06 CORVETTE AT ONLY 15,000 STREET DRIVEN MILES WAS INSPECTED BY A REPUTABLE THIRD PARTY REPAIR FACILITY, AND DISCOVERED THAT 14/16 VALVE GUIDES WERE BEYOND GM'S SERVICE LIMIT, AND THE REMAINING 2/16 WERE RIGHT AT THE LIMIT. THIS IS SOMETHING THAT SHOULDN'T OCCUR UNTIL 150,000 MILES AT LEAST...NOT 15,000. THERE NEEDS TO BE AN INVESTIGATION BEFORE MORE CATASTROPHIC FAILURES OCCUR. THERE ARE HUNDREDS IF NOT THOUSANDS OF DOCUMENTED OCCURRENCES.

NHTSA ID

10859846

Incident

Sep 21, 2015

Mileage

15,000 mi

THE LS7 ENGINE IS KNOWN TO HAVE BAD 2 PIECE EXHAUST VALVES THAT COME APART AND FALL INTO THE CYLINDER RESULTING IN A CATASTROPHIC ENGINE FAILURE THAT REQUIRES AN ENTIRE NEW ENGINE. THIS HAPPENED TO ME THIS PAST MARCH 2015. 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.

NHTSA ID

10725035

Incident

Mar 12, 2008

Mileage

21,900 mi

THERE WAS A MANUFACTURING ERROR MADE DURING ENGINE BUILD WITH THE VALVE GUIDES. THEY ARE MAKING A NOISE CURRENTLY. THIS CAN CAUSE THE ENGINE TO FAIL ABRUPTLY AND CONSEQUENTLY ONE COULD LOSE POWER (ENGINE) AND THUS LOOSE BRAKING ASSIST & POWER STEERING ASSIST AND CAN CAUSE A CRASH & COULD BE FATAL. *TR

NHTSA ID

10705351

Incident

Apr 13, 2015

Mileage

23,845 mi

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 7800 MILES ON IT TO A CORVETTE SPECIALTY SHOP ( KATECH) TO HAVE MY VALVE GUIDE CLEARANCE TESTED. I HAD (5) INTAKE VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, (4) EXHAUST VALVE GUIDES OUTSIDE OF SERVICE SPECIFICATIONS, AND A COMBINATION OF (3) 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. HERE IS A LINK WITH THE GUIDE MEASUREMENTS IN IT. HTTP://WWW.CORVETTEFORUM.COM/FORUMS/C6-Z06-DISCUSSION/3608443-KATECH-STAGE-2-Z06-SN-74-A.HTML. *TR

NHTSA ID

10704251

Incident

Feb 17, 2015

Mileage

7,812 mi

THE ENGINE HAD AN EXHAUST VALVE FAILURE CAUSING THE MOTOR TO LOCK UP AND REQUIRING OVER $5000 IN REPAIRS. WHEN THIS HAPPENED THE CAR WAS FORCED TO BE STOPPED ON THE HIGHWAY WITHOUT POWER BRAKES OR STEERING. *TR

NHTSA ID

10692889

Incident

Oct 10, 2014

Mileage

36,000 mi

ENGINE HAD EXCESSIVE NOISE. AFTER READING SEVERAL CORVETTE COMPLAINTS ABOUT IMPROPERLY MACHINED HEADS BY GENERAL MOTOR'S SUPPLIER LINAMAR, AND THAT NUMEROUS VEHICLES HAVE HAD VALVES DROP AND CATASTROPHIC ENGINE FAILURE, I HAD MY CAR WITH CHECKED AT A SPECIALTY SHOP. I HAD SEVERAL VALVE GUIDES 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. THIS STOPS THE ENGINE, POWER STEERING, AND POWER BRAKES 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. REGARDS. *TR

NHTSA ID

10678760

Incident

Jan 23, 2015

Mileage

30,000 mi

I BECAME AWARE OF A POTENTIAL VALVE GUIDE WEAR ISSUE WITH THE LS7 AND LS9 ENGINES THROUGH THE CORVETTE FORUM, THE CORVETTE ACTION CENTER, AND OTHER SOURCES. I BEGAN RESEARCHING THE ISSUE AND DECIDED THAT I SHOULD HAVE MY CAR CHECKED OUT AT A GM DEALERSHIP. IT WAS DETERMINED THAT THE VALVE TRAIN NOISE APPEARED TO BE NORMAL AND THE ENGINE WAS NOT BURNING OR USING ANY EXCESSIVE OIL. THE MORE I FOLLOWED THE VALVE GUIDE WEAR ISSUE, THE MORE CONCERNED I BECAME. THAT BEING SAID AND THE FACT THAT THE DEALER HAD NEVER HEARD OF OR HAD ANY CUSTOMER COME IN FOR THE ISSUE I DECIDED TO HAVE A LOCAL PERFORMANCE ENGINE SHOP (BECAUSE OF THEIR EXTENSIVE LS7 EXPERIENCE) INSTALL A REWORKED SET OF HEADS WITH BRONZE VALVE GUIDES WITH ADDITIONAL PARTS RECOMMEND BY THE SHOP, TO FIX THE PROBLEM PERMANENTLY, BASED ON THEIR KNOWLEDGE WITH THE ISSUE. MY ORIGINAL HEADS WERE EVALUATED FOR VALVE GUIDE WEAR AND 'EVERY INTAKE AND EXHAUST VALVE GUIDE WAS OUTSIDE OF THE GM SERVICE BULLETIN SERVICE LIMIT OF .0037 WITH THE #8 INTAKE VALVE BEING SO FAR OUT THAT IT WAS DEEMED N/R (SO LOOSE IT WAS TOO BIG FOR THE GAUGE READOUT). THE VEHICLE ONLY HAD 7500 MILES ON IT. 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. *TR

NHTSA ID

10676466

Incident

Oct 27, 2014

Mileage

7,500 mi

THE ENGINE EXHAUST VALVE GUIDES WERE OUTSIDE OF GM SPECIFICATIONS AND BOTH CYLINDER HEADS WERE REPLACED UNDER WARRANTY BECAUSE OF THIS. THIS DEFECT CAN CAUSE THE HEAD OF A VALVE TO SNAP OFF AND DESTROY THE ENGINE. THE ENGINE WILL STOP WORKING IMMEDIATELY, CAUSING THE POWER STEERING AND POWER BRAKES SYSTEMS TO FAIL. THE VALVE FAILURE CAN CAUSE A OIL SPILL ONTO THE ROAD IF THE ENGINE IS DESTROYED. 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. *TR

NHTSA ID

10671559

Incident

Jun 3, 2014

Mileage

45,748 mi

MY SON'S CAR BLEW UP WHILE TRAVELING ON THE FREEWAY ALMOST CAUSING AN ACCIDENT. HE WILL FILE A SEPARATE COMPLAINT. THERE IS A SYSTEMIC PROBLEM WITH THE Z06 AND THE 427 ENGINE SO I HAD MY HEADS CHECKED AS A PREVENTATIVE MEASURE AND THEY WERE FAR ENOUGH OUT OF SPEC THAT SELF DESTRUCTION WAS IMMINENT. THE HEADS WERE CHECKED AND REPLACED BY A CHEVROLET DEALER. THERE ARE HUNDREDS OF EXAMPLES OF THIS PROBLEM ON THE CORVETTE FORUM AND IT'S ONLY A MATTER OF TIME BEFORE SOMEONE GETS SERIOUSLY INJURED. I SINCERELY HOPE YOU WILL LOOK INTO THIS PROBLEM IN TIME TO PERHAPS SAVE SOMEONE'S LIFE. *TR

NHTSA ID

10670431

Incident

Oct 15, 2013

Mileage

14,000 mi