Chevrolet, which earned 128 points in the season-opening Firestone Grand Prix of St. Petersburg on March 29, has been penalized 220 points per Verizon IndyCar Series regulations.
According to Rule 10.6.4.4 of the Verizon IndyCar Series rulebook, 20 points will be deducted for a non-minor engine repair.
Eleven of the 12 Chevrolet engines in the field underwent repairs following the St. Petersburg race.
“We identified a batch of valve springs that, due to a process change at one of our suppliers, may fracture before the full mileage requirement," said Jim Campbell, Chevrolet U.S. vice president Performance Vehicles and Motorsports.
"We notified INDYCAR of the issue and obtained approval to change the valve springs. Eleven of our 12 engines were updated following the St. Petersburg race. Based on lower accrued mileage, the current plan is to address the 12th engine after the race at Barber Motorsports Park.”
All Chevrolet and Honda competitors are using the first of their allotted four engines covering 10,000 miles for the season.
Engine manufacturers, drivers and entrants receive championship points corresponding to their finish in a race.
Manufacturers also can gain 10 points for each engine that reaches its 2,500-mile change-out limit. But 20 points will be deducted for an engine failing to complete its life cycle and 20 points will be deducted for an engine undergoing a non-minor repair that requires a component change, subject to INDYCAR approval. The latter is what occurred with the 11 Chevrolet engines.