Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Chevrolet Corvette owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owned a 2006 Chevrolet Corvette. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. The vehicle was towed to the dealer where it was diagnosed that the exhaust valve had fractured in cylinder # 6, damaging the piston, crankshaft, and engine block. The dealer informed the contact that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 34,678.
Happened twice within a day. The main electric fan on the radiator stopped working and the car overheated. Once at idle, was able to shut the car off safely. The second time, there was traffic on the highway, and the fan stopped working and the car started to overheat. Had to shut the car off and wait for it to cool down on the side of the road. When I got the car home, I found the electrical connector of the fan to be melted and fused together. There was no indicator that the fan would stop running prior to the engine overheating.
while driving at ~45mph and 3500 rpm, an exhaust valve dropped on the pass side cylinder head. vehicle lost motive power. there was a hole in the block on the passenger side and the vehicle needed a long block replacement. the vehicle had 79,000 miles
Cylinder head valve guides worn requiring replacement before warranty expiration. If not repaired catastrophic motor failure can occur. If this happens car becomes uncontrollable with oil and coolant flooding out of motor. New heads were ordered from the factory and they were out of specification and needed modification before installed. Previous 2008 Corvette (unknown VIN but can be found at dealership where serviced had this same problem leading to the above mentioned failure and uncontrolled vehicle condition. This happened on an offload venue so there was no accident report. I don not know the exact dates but entered a date as required below.
I was concerned about excessive valve train noise and after reading several accounts of improperly machined heads by GM's supplier linamar, and that numerous vehicles have had valves drop, resulting in engine failure. As a result, after having been rebuffed by Chevrolet, I took my car with 36,000 miles on it to a Corvette specialty shop to have my valve guide clearance tested. I had several exhaust valve guides outside the maximum service specifications, indicating that a catastrophic engine failure was imminent. The car was 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. …
I was driving in s 35 MPH zone and it changed to 45 MPH. I was in 2 or 3rd gear and has just started up a slight incline and I was increasing speed when the car made a sudden jerk and loud almost a bang. I depressed the clutch and it stayed on the floor. I though that the clutch had came apart and I pulled the pedal up to see what was going on. The engine at that point was running very rough and would not hold speed or accelerate. I pulled into a parking lot and got my wife to pick me up. I then got my pickup and trailer and took the car to classic Chevrolet. They found where the valve had dropped into the cylinder and caused damage to the piston and rod. I looked at the engine while tore down and noticed what appeared to me to be a crack in the cylinder wall and pointed it out, the forman said the had checked it and didn't feel that it was a crack. …
Any quick search of the web will show that this car engine, the ls2 or 6.2 l engine has had a defect that GM has denied over the years and fails to stand behind after warranty; crank shaft pulley wobble and worn rubber gaskets on the harmonic balancer of the 2006 model year. Tech bulletins have been issued and this topic of pulley wobble and rubber gasket failure and is quite the talk on various Corvette forums. Since I am well behind warranty, I had to have this diagnosed through my licensed certified auto mechanic. This repair requires extensive labor time to repair. Scared to see the bill tomorrow. GM's response is I should of taken it to an authorized Chevy dealer. That is hog wash because should I had done that, I would probably still had to pay their exorbitant labor costs and still not be covered on this serious engine defect. …
Ls7 engine makes loud "ticking" sound at idle to ~ 2,000 RPM caused by defective cylinder heads which were improperly machined by GM's subcontractor. Local Chevrolet dealers said the noise is "normal"... But when heads opened and valve and valve guides measured, excessive valve and valve guide wear documented. Local GM dealer & $4,350 GM protection plan (extended warranty that I had to buy to cover this $5,000 repair) refused to repair so I had to drive it 5 hours to another GM dealer to get it repaired under my gmpp extended warranty. Many other 2006 to 2015 Corvette owners have experienced this same excessive valve wear including some owners valves breaking and destroying their $16,000 ls7 motors while spewing oil and metal everywhere. …
I started the car when it was cold, it began to squeal from the belts. I gave it a small rev and it squealed intensely, I mean very loudly! I opened the hood and belts were not moving. I could not move the car. The harmonic balancer had lost it's bond. I am just glad I was sitting still. At speed, the steering would have been lost, it could have killed me! I had the car towed to the shop, and it cost me $1000.00. Not good! I read that this happens alot. Bad design for sure. I should be reimbursed. What can I do? Chevy won't even talk to me about it. It's a shame because I love my car, but now I am afraid to drive it!
I have 2006 Chevy Corvette what a joke this car has been. I have had a new engine I have spent 40,000 on repairs to this car its never ending.I have replaced everything on it twice. I just got it out of the shop yesterday again for the thousands time and now the traction control light the brake light the tire light on the dash is on. This car is a nightmare. I have paid so much money to never ending drama. Help I beg you. The car has caught on fire due to the clutch fluid leaking everything you can think has has been replaced.talk about a lemon. No lemon law will help.
Engine complaints in other Corvette years
Frequently asked questions
How common are engine problems on the 2006 Chevrolet Corvette?
NHTSA has 28 complaints about the engine & cooling of the 2006 Chevrolet Corvette, 8% of the model year's 365 complaints. The component named most often is engine (1 mentions).
Is there a recall for 2006 Chevrolet Corvette engine problems?
No. NHTSA lists no engine & cooling recall for the 2006 Chevrolet Corvette, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2006 Chevrolet Corvette engine problems start?
Half of the complaints with a recorded mileage happened before about 29,000 miles, and 42% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 2 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.