Seven problems related to engine exhaust system have been reported for the 2006 Chevrolet Corvette. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Chevrolet Corvette based on all problems reported for the 2006 Corvette.
Manufacturing defected in the ls7 motor. Upon further investigation I had my 2006 Corvette z06 inspected for a loud audible tick in the motor. The source of this noise was from the in-balance from the #3 and #4 intake valves on the engines heads. There is premature wear on both valve guides causing internal failure to the motor. Under power demand the in-balance will cause the titanium rod to strike the sides of the valve seat causing the head of the valve to crack and fall into the cylinder. Once this occurs instant catastrophic failure of the motor happens resulting in white bellowing smoke from the exhaust, oil spillage, and engine lock resulting in the vehicle skidding off the road or loosing control. Fortunately for me I caught this in time before having a catastrophic failure. Both ls7 heads are being repaired and machined to meet industry standards. This problem must be addressed to all ls7 z06 owners as it could and has caused several crashes and possible deaths. Once repairs to the ls7 heads are made the vehicle can be returned to service.
Hello, I am reporting on my 2006 c6z06 Corvette that recently had the valve-to-guide clearances checked on my engine and my measurements are beyond the serviceable specifications on 8 out of 16 valves, both intake and exhaust. I consider this a safety hazard due to the fact that if the vehicle is driven and engine seizes, loss of control may occur. I also have what appears to be a leak on the fuel module/sending unit, specifically on the top plastic elbow connector. I have strong gasoline odor in the cabin of the car and visible gasoline from the underside of the car near the fuel tank.
I bought this Corvette z06 used from a private party. The engine had a catastrophic failure due to a known issue with the valve guides and valves in the ls7 motor from the factory. I was driving home from work when the motor failed. I was lucky to be only a mile from home when it failed and I was able to coast into my garage. The exhaust valve dropped and destroyed the #1 piston along with that cylinder, and the engine block. Nothing in the motor is salvageable as it bent or sent metal shards into every part of the motor. I have tried several times to get chevy to help me with this motor, but they will not help at all. They know about the problem, but will not lift a finger to help anyone.
Noticed a loud ticking from valve train. Had heads removed and found exhaust valve guides were out of specification after 11,000 miles by 50%. Had to do valve job on heads because chevy denied claim. Now a recall out for 08 and newer but no coverage for 2006 and 2007!.
Date of heads pulled: 7/5/12 head type: gm ls7 year: 2006 miles: 16,000 track time: none tune: stock I had my cylinder heads removed because I was paranoid after reading online about many other owners having issues with their valve guides being out of spec. My cylinder heads had valve guides that were way out of spec and the car only had 16,000 miles on it and was never tracked or abused. These were on the verge of having the valve break off and seize the motor which could have resulted in serious injury to myself and others around me while driving. I paid out of my own pocket to have these heads redone. Max allowable clearance is 0. 0037 for both intake and exhaust. Valve guide clearances intake #1 top . 0027 mid . 0021 bot . 0024 intake #2 top . 0030 mid . 0022 bot . 0028 intake #3 top . 0025 mid . 0022 bot . 0023 intake #4 top . 0030 mid . 0023 bot . 0025 intake #5 top . 0033 mid . 0022 bot . 0027 intake #6 top . 0028 mid . 0022 bot . 0025 intake #7 top . 0029 mid . 0023 bot . 0027 intake #8 top . 0030 mid . 0023 bot . 0028 ========================= exhaust #1 top . 0022 mid . 0026 bot . 0069 exhaust #2 top . 0022 mid . 0024 bot . 0048 exhaust #3 top . 0020 mid . 0028 bot . 0064 exhaust #4 top . 0022 mid . 0024 bot . 0039 exhaust #5 top . 0021 mid . 0029 bot . 0085 exhaust #6 top . 0021 mid . 0023 bot . 0046 exhaust #7 top . 0021 mid . 0024 bot . 0054 exhaust #8 top . 0022 mid . 0025 bot . 0033.
Massive engine failure due to a failed exhaust valve after inspection, car lost all power and was immobile after rolling to a stop. The 7 and 8 cylinder on the block were completely ventilated. This is a very common problem with 2006-2011 Corvettes and many others have had the same issue. What happens is the head of the exhaust valve falls off and then it makes contact with the piston and takes out the block and piston and rods. Please investigate this as there is several hundred or more z06 equipped with the ls7 motor that has had the same issue. It is a safety concern and imho there should be some kind of recall on these motors.
The exhaust valve broke and destroyed the motor.