Noises related to powertrain can be divided into several main components:
- noises emitted by powertrain (Idle clattering diesel noise, gasoline injectors, valve mechanism, turbo,..)
- accessories noises (starter, alternator, absorber, …)
- noises emitted by the intake system
- gear box, transfer box noises (whining, rattle)
- exhaust blow noise, exhaust system elements rattle
- engine bay cooling or warming system noises (fan, wateur pump, ...)
- 4WD systems noises (mechanic, electric, hydraulic)
- noise and vibration of driveshafts
- electronic systems cooling quietness