Why Is The Sound Of 2004 Mitsubishi Shogun Diesel Approximate

My car is a 2004 Mitsubishi Shogun, Diesel with 160,000 km. I have a feeling that the engine noise is a bit harsh. Although the oil is regularly replaced, the filters are in good condition. Is it time to make or calibrate the settings? The car can travel a maximum of 120 km, is it normal? And Also Why did the black smoke come out while the car was traveling more than 80 km / h?

Thanks
Andre

Answer:

Using a car with a diesel engine does not mean that no maintenance is required. Like a petrol engine, a diesel car must be treated as a setting and so on, not just by replacing the oil or filter. The background noise of the motor is usually caused by a space of the valve whose space is already within the tolerance limit, which is restarted to overcome it.

Exhaust fumes become unusually black, diesel becomes garbage and it's difficult to start in the morning, which generally indicates that the performance of the nozzle is not good enough. Check the mouthpiece, clean it and recalibrate it. Also check the injection pump and make sure there is no melted oil or diesel around the injection pump. It would be nice if the injection pump was set every 20,000 km. The poor quality of the diesel can accelerate the damage of the injection pump. If the engine is in good condition and is pulling light, the solar and economic speed may increase