Whirring Noise From the Front of the Engine at Idle That Stops: Diagnosing Accessory Drive and Belt System Failures
A whirring noise from the front of the engine at idle that stops is most commonly caused by a failing serpentine belt tensioner pulley bearing or idler pulley bearing that produces noise at idle but quiets when engine RPM increases and the bearing operating conditions change. The front of the engine is where all accessory […]