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anyone have this problem driving 40 to 50 MPH came to stop and started moving again and the engine started missing , felt like bad gas or water in fuel , just made it to parking area and had to call rollback . back to dealer and they found broken valve spring , seems very odd only 34000 miles and having this happen
 

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Sorry to read of your issue. What model year and version C7 do you have?
 

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happened to me at 6k. gm did a botch job fixing. Repaired head replaced 1 piston and 2 valves. I work for ford and we have not repaired a block or head since the 80's be prepared to get screwed
 

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My brother's 2014 with low miles (probably less than 20K and still under warranty) dropped a valve on an exit ramp. Chevy put a new motor in it for him, very few if any questions. He's in the VA/DC area. Don't give up.
 

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Sorry to hear that George. I feel for you. It happened to my 2016 Z06 at 10k, luckily it was clean snap of the spring. I asked the dealership replaced the other springs but they wouldn't do it, so far no issues.
 
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