What Causes the Loud Noise in BMW N20 Engine?

[McDaniela]

BMW N20 engine loud noise reasons are as follows: High-pressure fuel injector vibration: The noise in BMW's N20 engine is caused by the vibration of the high-pressure fuel injectors. This noise is generally unaffected by the engine's temperature and persists consistently. High fuel injection pressure: Since the engine is direct-injection and BMW's fuel injection pressure is relatively high, this results in more complete fuel combustion, better fuel efficiency, and stronger power, but it also leads to noise at low RPMs. Eccentric design of piston and connecting rod position: Due to the eccentric design of the piston and connecting rod position, the engine delivers stronger power at high RPMs and runs more smoothly, but this also causes relatively loud noise at low RPMs.