Engine was found to have valve guide clearances extremely out of allowable specs. Problem was detected by american heritage performance, a company that specializes in these types of engines. If the problem had not been corrected and a failure had occurred, it could have locked up the engine causing the rear wheel to lock up and send the car out of control.
2006 Chevrolet Corvette engine complaints
Page 2 of 2: complaints 11 to 28 of 28, newest first, as owners wrote them.
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.
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. This also resulted in a fear of driving this car, a significant "diminishment of value" of this vehicle, and complicated its resale (buyers had heard about these catastrophic ls7 motor failures.
The cylinder heads have valves that are out of spec with 23,000 miles. The car is out of warranty due to age, and I was forced to purchase aftermarket cylinders heads to fix the worn valve issue to insure I don't drop a valve and have a catastrophic engine failure.
Z06 7.0l engine valve guides out of spec after 12k miles. This is due to a manufacturer defect in machining and or materials. Failure of the guides results in dropping a valve and catastrophic engine damage. As a catastrophic failure often causes the rear wheels to lock and/or the engine to oil down the road and possibly the rear tires which could lead to an accident or injury to others. This is an extreme safety concern.
Excessive valve train noise, engine noise, knocking.
Tl* the contact owns a 2006 chevrolet corvette. While driving at any speed, the engine shook and the harmonic balancer wobbled. The failure recurred several times. The vehicle was taken to the dealer where it was diagnosed that the harmonic balancer needed to be repaired. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 6,100.
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. In fact, I believe gm has re-designed the part so what does that tell you. Failure to fix will just harm the engine for the future and replace belt after belt when the true problem is ignored by gm
The exhaust valve broke and destroyed the motor
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 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. 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 loss of steering, braking capability, and which can result 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 while the vehicle is underway on public roadways.
The harmonic damper on 2006 corvette with ls2 engine failed resulting in power steering drive belt coming off pulley causing loss of power steering. The high effort required to steer vehicle almost resulted in crash. This harmonic damper issue is documented in numerous internet forums and is believed to be a widespread issue that should be recalled and corrected by the manufacturer.
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.
According to corvette forum, this is another widespread problem- the harmonic-balancer becomes warped and requires replacement... If not done timely, other "parts" could be negatively impacted as well...
Started hearing squealing sounds a few weeks ago. Noticed the crankshaft pulley had a noticeable wobble. Did a google search & found multiple reports on forums, youtube and such of of others with the same problem. Also my friend with the same car but a newer year just had it replaced under warranty. My car is off warranty but a harmonic balancer should not wear out in six years with just 7,500 miles (yes, seven thousand five hundred). My 2000 ford expedition has 151k. Chevrolet wants about $1,000 to replace it. *tr
2006 chevrolet corvette. Consumer states loss of headlamps when engine heats up.
Car starts bucking, check engine light comes on, white smoke blowing out exhaust, eventually car dies. Dealer states, 02 sensor in bank one failed. Car has been back to dealer for same failure 5 times in a 4 month period. P0131, p1133, p0300 and p0171. Purchased vehicle june 20, 2008 fist issue was july 15, 2008. Vehicle was purchased as a gm certified used vehicle with less then 25000 miles on it. Gm case # 10447543. Car was last in the shop 11/2008 and has been put in my garage for the winter. Will not know if problem has been resolved until spring.
2006 chevrolet corvette z06 oil line related engine fire customer states that this seems to be a known problem**cc the consumer stated on june 8, 2007 his new car sustained a 3 point engine fire related to an engine oil line defect. The consumer he stated was accompanied by experienced gm certified mechanic who assessed for unrelated repairs and warranty work. The consumer stated the mechanic made an analysis as to what caused the fire. Analysis revealed a defective oil line at the crimped- on rubber hose to metal interface which conducts oil to an external cooler.
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