4.9

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
21,145 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

Get notified about new defects, investigations, recalls & lawsuits for the 2009 Chevrolet Corvette:

Unsubscribe any time. We don't sell/share your email.

problem #18

Oct 012018

Corvette

  • 30,000 miles
Valve guides worn - all- out of specification at 30K miles, heads removed and valve guides and exhaust valves replaced.

- Dripping Springs, TX, USA

problem #17

Aug 062018

Corvette

  • 34,000 miles
Fuel leak

- Wellington, FL, USA

problem #16

Jan 012018

Corvette

  • 95,000 miles
Had to have cylinder heads rebuilt because manufacturing issue with valve guids wearing quickly out of spec and if not corrected destroying the entire motor. I got a check engine light with misfire which was caused by worn guides. Sent heads into be rebuilt and found out that they were way out of spec. Some at.030 and spec cut off at.006

- West Jordan, UT, USA

problem #15

Feb 142018

Corvette

  • miles
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: 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.

- Alexandria, PA, USA

problem #14

Jul 192017

Corvette

  • 11,000 miles
Regarding the cylinder heads, I am one of hundreds that experienced intake and exhaust valves that were out of specification due to inadequate cylinder head design and valve guides. As a result, I needed to have my heads replaced with rebuilt heads and new valve guides. The uploaded document highlights the measurements on the valves as being out of specification after they were tested upon removal from my vehicle. On an engine with only 11,000 miles at the time, this is alarming. Hundreds others have experienced the same defect. This is a safety issue as when a valve drops, it falls into the engine having the effect of potentially immediately seizing it up which would then cause the car to lock the rear wheels and lose control

- Zionsville, IN, USA

problem #13

Nov 292017

Corvette

  • 300 miles
Although my car is a 2009 it only has 300 miles on it. The ZO6 model which has the "LS7 engine has a known valve issue with both intake and exhaust being out of spec and wearing rapidly. I had a "wiggle test" done on all my valves. More than half of the 16 valves were out of spec. If the issue is not correct a valve will drop and a new engine will be required.

- Long Beach, CA, USA

problem #12

Oct 252016

Corvette

  • miles
Engine valve train subject to complete failure due to improper manufacture causing a total engine failure an possible loss of control at speed.

- Colorado Springs, CO, USA

problem #11

Feb 162017

Corvette

  • miles
I was concerned about excessive valve train noise and after reading several Corvette forum threads and speaking to numerous Chevrolet mechanics about improperly machined heads by GM's supplier linamar, and that numerous vehicles have had valves drop and ruin the engines. This has happened on completely stock vehicles. People with less than 20000 miles have lost motors. 88% of the Corvette forum members who have had their cylinder heads tested for excessive valve guide wear, were out of service specifications. Source: 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. If the engine fails due to dropping a valve, the engine will immediately shut off, which cuts off power steering and power braking. This is a very huge safety concern.

- Taylorsville, NC, USA

problem #10

Sep 022016

Corvette

  • 7,500 miles
Valve guide issue causing failure to brakes, and power steering, as well as engine blowing

- Spring, TX, USA

problem #9

Mar 092016

Corvette

  • 37,000 miles
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 37,000 miles on it to courtesy Chevrolet / Cadillac to have my valve guide clearance tested. I had (3) intake valve guides outside of service specifications, (7) exhaust valve guides outside of service specifications, and a combination of (11) other intake and exhaust valve guides at or near the maximum outside of service specifications. The cost of 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. Is something I simply cannot afford at the moment with the downturn of the oilfield industry. Please bear in mind, my car had a replacement LS7 engine from a dropped exhaust valve before I owned it, so this has already happened to my car once. It occurred at 22xxx miles, and can have the GM dealer print a copy of the ro line to prove it. This is occurring at an alarming rate, but after our warranty period, we the consumer are left out to dry. 88% of the Corvette forum members who have had their cylinder heads tested for excessive valve guide wear, were out of service specifications. Source: 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. Please assist us in having GM make this right.

- Youngsville, LA, USA

problem #8

Sep 212015

Corvette

  • 15,000 miles
GM denies any sort of wide spread issue with respect to the manufacturing/assembly of the cylinder heads for the LS7 engine. There have been numerous catastrophic engine failures as a result of a broken valve head dropping into the cylinder and subsequently blowing a hole through the motor, causing fluids to leak all over the road, and complete loss of control of the vehicle. The symptoms are premature valve guide wear, which eventually become so worn that the valve closes on the wrong angle to the seat, and off breaks the valve head. The issue appears to be poor valve guide to valve seat concentricity, which leads to premature valve guide wear. My 2009 Z06 Corvette at only 15,000 street driven miles was inspected by a reputable third party repair facility, and discovered that 14/16 valve guides were beyond GM's service limit, and the remaining 2/16 were right at the limit. This is something that shouldn't occur until 150,000 miles at least...not 15,000. There needs to be an investigation before more catastrophic failures occur. There are hundreds if not thousands of documented occurrences.

- Honolulu, HI, USA

problem #7

Mar 122008

Corvette

  • 21,900 miles
The LS7 engine is known to have bad 2 piece exhaust valves that come apart and fall into the cylinder resulting in a catastrophic engine failure that requires an entire new engine. This happened to me this past March 2015. 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.

- Schiller Park, IL, USA

problem #6

Apr 132015

Corvette 8-cyl

  • 23,845 miles
There was a manufacturing error made during engine build with the valve guides. They are making a noise currently. This can cause the engine to fail abruptly and consequently one could lose power (engine) and thus loose braking assist & power steering assist and can cause a crash & could be fatal.

- Rockwall, TX, USA

problem #5

Feb 172015

Corvette 8-cyl

  • 7,812 miles
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 7800 miles on it to a Corvette specialty shop ( katech) to have my valve guide clearance tested. I had (5) intake valve guides outside of service specifications, (4) exhaust valve guides outside of service specifications, and a combination of (3) 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: 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. Here is a link with the guide measurements in it. www.corvetteforum.com/forums/C6-Z06-discussion/3608443-katech-stage-2-Z06-sn-74-a.html.

- Peotone, IL, USA

problem #4

Jan 232015

Corvette

  • 30,000 miles
Engine had excessive noise. After reading several Corvette complaints about improperly machined heads by general motor's supplier linamar, and that numerous vehicles have had valves drop and catastrophic engine failure, I had my car with checked at a specialty shop. I had several valve guides 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: 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. This stops the engine, power steering, and power brakes 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. Regards.

- Tucson, AZ, USA

problem #3

Oct 272014

Corvette 8-cyl

  • 7,500 miles
I became aware of a potential valve guide wear issue with the LS7 and LS9 engines through the Corvette forum, the Corvette action center, and other sources. I began researching the issue and decided that I should have my car checked out at a GM dealership. It was determined that the valve train noise appeared to be normal and the engine was not burning or using any excessive oil. The more I followed the valve guide wear issue, the more concerned I became. That being said and the fact that the dealer had never heard of or had any customer come in for the issue I decided to have a local performance engine shop (because of their extensive LS7 experience) install a reworked set of heads with bronze valve guides with additional parts recommend by the shop, to fix the problem permanently, based on their knowledge with the issue. My original heads were evaluated for valve guide wear and 'every intake and exhaust valve guide was outside of the GM service bulletin service limit of.0037 with the #8 intake valve being so far out that it was deemed N/R (so loose it was too big for the gauge readout). The vehicle only had 7500 miles on it. 88% of the Corvette forum members who have had their cylinder heads tested for excessive valve guide wear, were out of service specifications. Source: 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.

- Plymouth, MI, USA

problem #2

Jun 032014

Corvette 8-cyl

  • 45,748 miles
The engine exhaust valve guides were outside of GM specifications and both cylinder heads were replaced under warranty because of this. 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 a oil spill onto the road if the engine is destroyed. 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.

- Renovo, PA, USA

problem #1

Oct 152013

Corvette 8-cyl

  • 14,000 miles
My son's car blew up while traveling on the freeway almost causing an accident. He will file a separate complaint. There is a systemic problem with the Z06 and the 427 engine so I had my heads checked as a preventative measure and they were far enough out of spec that self destruction was imminent. The heads were checked and replaced by a Chevrolet dealer. There are hundreds of examples of this problem on the Corvette forum and it's only a matter of time before someone gets seriously injured. I sincerely hope you will look into this problem in time to perhaps save someone's life.

- Oakhurst, CA, USA