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C7 Corvette Owners Keep Reporting Blown Engines, this Knocking LT1 V8 Sounds Painful

It was fall 2014 when the C7 Corvette’s blown engine issue started arising, with Car and Driver’s Stingray long-term tester blew its LT1 V8 after 6,000 miles. GM said it would investigate the matter, but here we are in June 2015, with more cases of powertrain failures reported.
C7 Corvette Stingray LT1 V8 engine 1 photo
Photo: CSEVEN on Corvette Forum
The most recent example comes from the 2014 Corvette in the video below, whose owner somehow had the heart to leave the engine run knock for long enough to record a video that hurts.

The man has turned to the Corvette Forum to share his unfortunate story with the world, creating a log for us:

1.June 7th, engine started making a lower end knock (the intense contents of the clip below)
2. June 8 through June 11, warranty tear down, 4 blown bottom bearings
3. June 12th complete long block engine, torque tube and clutch assembly approved under warranty
4. June 16th new motor arrives at dealership containing metal dust in cylinder heads
5. June 17th GM sends 2nd replacement motor VIA FedEx P1
6. June 18th Motor arrives at Dealership and installation process begins
7. June 19th Car is ready for pick-up $25K+ repair bill covered by GM

GM handled the warranty matter with care

The only positive side of this story is that the Corvette was back on its wheels after just 12 days, with the man now enjoying a new motor instead of the 18,000-mile one he started out with.

Still, the metal dust seems to be an issue that persists - C&D’s Corvette was affected by metal debris from a faulty oil filter, with these affecting a con-rod bearing and eventually ruining the engine block.

We’re waiting to see how the frequency of such cases evolves with our fingers crossed here.

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About the author: Andrei Tutu
Andrei Tutu profile photo

In his quest to bring you the most impressive automotive creations, Andrei relies on learning as a superpower. There's quite a bit of room in the garage that is this aficionado's heart, so factory-condition classics and widebody contraptions with turbos poking through the hood can peacefully coexist.
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