What is the cause of abnormal noise of BMW n20 engine?

There are several reasons for abnormal noise of BMW n20 engine in Pacific Auto Network: 1, serious carbon deposition on the engine; 2. Ignition system problems; 3. The oil pressure is unstable; 3, engine parts aging, etc.

The causes of abnormal noise of BMW n20 engine are introduced in detail.

1, engine carbon deposition is serious.

The most common cause of automobile jitter is that the throttle is too dirty or the injector has too much carbon deposit. Solution: clean the oil circuit, check whether there is carbon deposit in the idle motor, and clean it all winter.

2, the ignition system problem

Check the working conditions of spark plugs, high-voltage lines and ignition coils. If the ignition system does not work well, poor ignition conditions of the spark plug will also lead to this failure. Solution: Check whether there is too much carbon deposit in the spark plug and replace the spark plug.

3. The oil pressure is unstable

If the engine carbon deposit has been cleaned, the throttle valve has been cleaned, the oil pad and spark plug have been replaced, and the body is still shaking when idling, it is recommended to go to the 4s shop to check whether the fuel supply pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is wrong, the car body will shake. Solution: Check the oil pressure and replace parts if necessary.

4, engine parts aging

Car jitter is also related to the aging of guide feet (also known as claw pads). The engine foot is actually the shock absorption system of the engine, which is responsible for absorbing the slight vibration when the engine is running. If there is something wrong with the arch foot, these vibrations will be transmitted to the steering wheel and cab, causing idling jitter. Solution: Replace parts.

(Photo/Text/Photo: Pacific Auto Network Tang Yanyan)