Chevrolet reveals cause behind flurry of IndyCar engine changes in Detroit

During IndyCar warm-up on Sunday in Detroit, Chevrolet General Motors president Mark Reuss confirmed the root cause of the issue behind a rash of engine changes in the IndyCar garage.
"We had a supplier issue with the valve and the valve guide, and it's a coating issue," Reuss told IndyCar on FOX. "And so if you can imagine the valve sitting in the guide with the wrong coating, over time ...Keep reading