Why Does a Diesel Engine Make Abnormal Noises?
2 Answers
Because the diesel engine produces a rattling noise. Below is relevant information about diesel vehicles: Precautions: Pay attention to the engine's water temperature being too high. First, move the vehicle to a well-ventilated and shady area. Open the engine hood and wait for the coolant temperature to drop. If it's necessary to open it immediately, you can use a large towel soaked in water, cover the antifreeze reservoir cap, and then try to slowly open the cap. When steam emerges, quickly move your hand away. Wait until the steam completely dissipates before finally opening the reservoir cap and adding coolant. Scrap time: The vehicle must be forcibly scrapped when the mileage reaches 600,000 kilometers, but the specific condition of the vehicle should also be considered. For commercial vehicles, they must be scrapped after 8 years. Every vehicle has its own scrap time limit from the moment it is purchased, which is a system designated by the national transportation department. That is, during the use of the vehicle, safety inspection regulations are stipulated based on the number of seats and the period of use.
As a technician with over 20 years of experience in auto repair shops, I must say there are quite a few reasons for abnormal noises in diesel engines. The most common issue lies in the fuel system—like clogged fuel injectors causing uneven spray patterns, making the engine rattle like a drum. Or when the high-pressure pump wears out and oil pressure becomes unstable, you'll hear a distinct 'tick-tick-tick' during acceleration. Mechanical components are another culprit: worn piston rings, loose bearings, or aged parts create unsettling metal grinding sounds. Excessive carbon buildup also amplifies noise, especially during cold starts or uphill climbs. I've seen many owners neglect maintenance until problems escalate. My advice? Check the fuel filter and clean injectors every six months—it can prevent major overhauls. Safety-wise, ignoring persistent noises risks worse failures, so getting an immediate inspection is the smart move.
