2006 z06 corvette engine was making an unusual noise. After doing some research and the finding, it was determined that the valvetrain on the engine may be pending failure. The heads were removed and valve train tolerance checked to be found way out of serviceable limits. Thus requiring repair. This was considered excessive wear for such a low mileage vehicle that was pending catastrophic engine failure if the repairs to the heads was not performed. In doing additional research, this appears to be quite common for the z06's 7.0l ls7 engine. Luckily my engine did not have a catastrophic failure because I took preventative measures at my own cost, but this design should be considered a failure and recalled. I was not going to risk a catastrophic engine failure possibly on the highway and put myself and others at risk. Please investigate.
2006 Chevrolet Corvette Z06 engine complaints
Page 2 of 2: complaints 11 to 18 of 18, newest first, as owners wrote them.
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.
My son was driving and just completed a turn when he applied the accelerator and the engine stopped abruptly. There was a cloud of smoke and then a small fire underneath the car from the oil that came out from a baseball size hole in the side of the block below the number 8 cylinder. Upon further investigation, a valve in the number 8 cylinder snapped below the valve guide dropping the head of the valve onto the piston which caused the failure. I have the engine available for inspection.
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.
The cylinder heads at 69k miles were checked due to excessive valve train noise and the valve guides and one intake valve were found to have clearance more than double the service tolerance.
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!
I was driving back home from lunch with a friend I haven't seen for a while, car ran flawlessly up to the loss, dropped him back off at his car and we parted ways. Then on my way home, making a left hand turn, going about 40mph, 3rd gear cruising along all of a sudden the car sounded like the exhaust came loose, followed by a lot of engine noise, followed by a large white puff of smoke from behind. I had a extended warranty that was by mercury and they denied the warranty due to abuse. Went to a race event 3 months prior and did 3 races on a straight away from 50-130, found footage of my car on youtube and they claimed that was the reason why I blew my motor. They said I either had to deny that and risk getting charged with fraud or admit that was me in the video. This will definitely be the last gm I ever buy. Now left with a useless car and having to pay out of pocket for a new motor.
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.
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