11 problems related to engine exhaust system have been reported for the 2007 Chevrolet Corvette. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Chevrolet Corvette based on all problems reported for the 2007 Corvette.
Dangerous conditions. Exhaust valve design causes ear that eventually breaks exhaust valve and destroys engine. Exhaust valve loose enough to break and cause engine damage, possible fire and/or flammable fluid leakage. . Read more...
My 10,000 mile 2007 heads are at ahp for rebuilding. They reported back that 1 exhaust and 3 intake guides were worn past the service limit. Several others were close or at the limit.
I was participating in a high performance driving education (hpde) event and was driving my car going approximately 50 mph on the virginia International raceway (vir) on Tuesday afternoon, June 27, 2017, when it seemed to loose acceleration. I drove further on the track and still did not have normal acceleration and I saw blue smoke coming out the the exhaust so I exited the track and when I got in the engine stopped. Several mechanic type people familiar with Corvettes looked at my car engine and instructed me to try to start it, which I was able to do and again blue exhaust smoke came out. I turned off the engine and had it towed to my car dealer, holiday Chevrolet in williamsburg, va. Their mechanics determined that the exhaust valve in cylinder #1 dropped from the head into the cylinder and eventually exited the engine through the exhaust port and into the catalytic converter. The mechanic determined that the engine block was damaged beyond repair and an entire engine replacement was required, which is what I did.
This model Corvette can suddenly drop an engine valve (exhaust or intake) and unexpectedly develop a hole in the block accompanied with oil spilled on the roadway, smoke billowing with risk for vehicles behind and in front, and the risk for total loss of power steering, braking and control of the vehicle. The outcome if this happened on a freeway with cars travelling at a high rate of speed is potentially fatal. All of this is due to machining errors and supplier defects for the associated parts (valves, guides, etc. ) on all 2006-2013 Corvette c6 z06's made by gm.
After months of reading about the exhaust valve issue with Corvette z06’s I took my car and had the heads checked. The shop found the valve guide clearance to be outside the specified acceptable range. The defect puts undue stress on the sodium filled valves and if the valve fails it can cause catastrophic engine damage and potentially deadly situation if this occurs at speed on the roadway as the driver will lose ability to control the vehicle potentially causing a deadly accident. I paid several thousand dollars out of pocket to fix this issue despite gm acknowledging there is an issue with these vehicles.
My cylinder head intake and exhaust valves were severely out of gm's . 0037" maximum wiggle tolerance. The valves were tested by yuma auto and trans as well as american heritage performance (harbor city, CA). Not addressing the issue may have caused a dropped cylinder valve and blown engine.
The exhaust valve broke off, and engine blew up. I was driving on highway.
At only 21,179 miles, my dealer inspected both cylinder head banks and found valve guide clearance to be well out of maximum allowed specification. This defect puts undue stress on the hollow, sodium-filled exhaust valves. If an exhaust valve breaks, the exhaust valve will drop into the combustion chamber, and cause a complete, catastrophic failure of the engine. This causes hazardous conditions for the driver, passenger, and surrounding traffic: the drive wheels may become locked as the engine seizes and the engine block may become windowed by a rod, causing a large spill of oil and coolant immediately under the vehicle on the roadway. These conditions could lead to a severe accident from a sudden spin and/or a fire. I have little confidence that the cylinder heads replaced on my car are free from the valve guide clearance defect. As more owners have become aware of the problem, replacement cylinder heads have been measured before installation on the engine and have been found to have defects in valve guide clearance and valve guide to seat concentricity, such as what could lead to a dropped exhaust valve and an accident. The vehicles should be recalled and fixed before any more serious accidents occur. Although my vehicle did not fail despite having the defect, I have seen a video of a spin caused by the failure, I have seen pictures of a vehicle after a fire caused by the failure, and I have seen reports of approximately 35 failures; all from Corvetteforum. Com. Therefore I am concerned about my safety when driving the vehicle and I believe the NHTSA should investigate the matter.
Exhaust valve guides are excessively worn beyond service limit. Approximately 4 times service limit. This is a definite safety hazard to me and to those around me. The worn valve guide causes the exhaust valve to stretch, and eventually break. When the valve head breaks, it beats its way out of the engine, causing potentially: engine lockup, oil spill on highway, large smoke cloud and debris out the rear of the vehicle. Loss of control of the vehicle imminent danger to those around me due to loss of vision and slippery roadway. This issue affects all 2006 to 2013 Chevrolet Corvette z06.
It is stock and no tune verified by ( reliable Chevrolet in springfield mo. And show-me speed in nixa mo. ) at 49562 mile it drop the #6 exhaust valve which in turn destroyed the motor I have had this car to 3 different shops and they are all saying the same thing excessive wear on all the exhaust valve guides 2 of the shops determined this wear caused the exhaust valve to break other shop couldn't say.
Exhaust valve broke due to valve guides being out of spec. Engine seized. Immediate loss of power steering and brakes due to seized engine.