Two problems related to engine knocking noise have been reported for the 2007 Chevrolet Cobalt. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Chevrolet Cobalt based on all problems reported for the 2007 Cobalt.
The contact owns a 2007 Chevrolet Cobalt. The contact stated that while driving approximately 27 mph, there was a loud knocking noise heard from the engine. The contact shut the vehicle off but was unable to restart the engine. The vehicle was towed to an independent mechanic, who diagnosed that the vales in the motor were bent. The manufacturer was notified of the problem. The approximate failure mileage was 140,000.
Knocking noise from rear of vehicle from cold start. Has occurred numerous times.