2007 Chevrolet Corvette Z06: engine failure

Filed May 31, 2017 · Engine · 42,000 miles · TX

#1 azdanz06's avatarazdanz06 , 01-06-2015 11:27 am link to file complaint: https://www-odi.the federal safety agency.dot.gov/vehicl...nt/index.xhtml I just filed a complaint with the federal safety agency about the out of spec valve guide issue, I would encourage everyone else to do so as well, maybe just maybe it will force gm to finally do a recall and qc on parts. Here is my complaint: I was concerned about excessive valve train noise and after reading several corvette forum threads about improperly machined heads by gm's supplier linamar, and that numerous vehicles have had valves drop and ruin the engines, 88% of the corvette forum members who have had their cylinder heads tested for excessive valve guide wear, were out of service specifications. Source: https://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 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 going down the road. #2 whis9's avatarwhis9 , 01-06-2015 11:39 am

Filed Feb 17, 2016 · Engine · 24,000 miles · WA

I was concerned about excessive valve train noise and after reading several corvette forum threads about improperly machined heads by gm's supplier linamar, and that numerous vehicles have had valves drop and ruin the engines, I took my car with 27000 miles on it to a corvette specialty shop to have my valve guide clearance tested. I had (2) intake valve guides outside of service specifications, (4) exhaust valve guides outside of service specifications, and a combination of (10) other intake and exhaust valve guides at or near the maximum outside of service specifications. The car is being 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 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 going down the road.

Filed Jan 5, 2016 · Engine · 35,995 miles · NJ

The exhaust valve broke off, and engine blew up. I was driving on highway.

Filed Sep 9, 2015 · Engine · 28,100 miles · GA

I am extremely concerned about excessive valve train noise and after reading several corvette forum threads about improperly machined heads by gm's supplier linamar, and that numerous vehicles have had valves drop and ruin the engines causing a loss of control of the vehicle due to the engine stopping abruptly. 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/c6-z06-discussion/3386141-the-out-of-spec-guide-wear-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 severe 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 going down the road. It has been noted on the forum that gm is very aware of the issues and I assume they think no one will report them for not handling it correctly. The issue is this is a critical safety issue for anyone driving a 06-13 z06 model on the road. I am to the point I don't feel safe to drive my vehicle anymore due to the loud 'ticking' valve-train as it is (symptom) meaning it is likely to fail at any moment seizing the engine while on the road. I have waited on gm for 6 years to do the correct thing on their own but I am now reporting it due to their gross negligence and disregard of their customers safety.

Filed Jun 1, 2015 · Brakes, Engine · 33,000 miles · DC

While driving on the road at aprox. 45mph, my car exhaust valve dropped in the motor causing immediate engine failure also creating power steering and power brakes to stop working immediately. This same exhaust valve issues occurred with many other gm corvettes with the 7.0liter z06 motor.

Filed Mar 22, 2015 · Transmission · 19,000 miles · NH

When I had the motor checked proactively the exhaust valve guides were outside of gm specifications. This defect can cause the head of a valve to snap off and destroy the engine. The engine will stop working immediately, causing the power steering and power brakes systems to fail. The valve failure can cause an oil spill onto the road if the engine is compromised. There have been numerous documented cases of engine failure as a result of a dropped valve into a cylinder. This can cause a catastrophic accident or fire. 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 going down the road. I was forced to spend in excess of $3k to insure I did not harm anyone or myself. Best regards

Filed Feb 10, 2015 · Engine · 33,720 miles · WA

Wiggle test on all valves showed all exhaust valves with excessive guid where....safety issue....!!! This can and has LED to catastrophic engine failure at freeway speeds.......

Filed Jan 8, 2015 · Engine · 43,000 miles · TX

When I purchased the 2007 corvette z06, I was instructed to have the heads checked for excessive valve guide wear. I had the heads pulled and the valves examined by a local expert. He indicated that the valve guides were out of specification and needed replacement. I replaced these at my own expense of over $2000.00. Had the engine blown up as a result of this defective condition, the breaks and power steering would fail causing an accident. I would like gm to issue a recall on this model corvette.

Filed Jan 7, 2015 · Engine, Transmission · 20,243 miles · NC

Abnormal valve guide wear in cylinder heads considering age and mileage of vehicle. Potential catastrophic engine failure from dropped valve if not addressed. Chevrolet should fix whether vehicle still in warranty or not as is believed to be poor quality control resulting in machining errors.

Filed Jan 6, 2015 · Engine · 18,000 miles · MD

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.

Filed Jan 6, 2015 · Engine · 37,000 miles · MN

Exhaust valve broke due to valve guides being out of spec. Engine seized. Immediate loss of power steering and brakes due to seized engine.

Filed Aug 14, 2013 · Engine · 51,617 miles · MD

Submission from constituent re repairs on his 2007 chevrolet corvette (the engine "dropped a valve") *smd the consumer was informed, the entire engine needed to be replaced at a cost of $18,722. Instead of replacing the engine, at no cost to the consumer, general motors offered to pick up 45% of the cost, leaving the consumer to pay the balance of $10,630. The consumer stated gm issued an internal bulletin as far back as february 2008, that showed they were aware of the z06 engine failures and short life expectancy.