What is the reason for the intermittent buzzing sound in the engine?
3 Answers
The reason for the intermittent buzzing sound in the engine is: carbon buildup in the generator or possible bearing damage; low oil pressure or poor oil quality. Engine Introduction: An engine is a machine capable of converting various forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. Engine Working Principle: The working principles of two-stroke engines and four-stroke engines differ, with the majority of automobile engines being four-stroke. The working cycle of a four-stroke gasoline engine consists of four piston strokes: intake stroke, compression stroke, power stroke, and exhaust stroke.
I encountered the issue of intermittent humming sounds from the engine when driving my new car on the highway. The sound came and went, especially noticeable when climbing hills. After inspection, the mechanic told me that the most common causes are aging or loose belt systems, such as the alternator belt or AC belt slipping due to wear, which produces intermittent friction noises. It could also be due to damaged fan bearings, especially if the cooling fan motor isn't operating properly. Additionally, rusty or insufficiently lubricated bearings in the water pump or alternator can produce a humming noise, which is often misdiagnosed. My experience suggests first opening the hood to listen for the source of the sound and gently shaking related components to check for looseness. If left unaddressed, the noise may worsen, leading to reduced vehicle performance or even damage to other components. It's advisable to promptly visit a repair shop for inspection and replacement. If attempting DIY repairs, be cautious around high-pressure areas. Regular cleaning of the engine compartment during maintenance can help prevent such issues.
I've been driving for over a decade and often hear the engine buzzing intermittently, which is particularly annoying. The most common cause is loose fan belts or AC belts, creating a cicada-like sound when rubbing. Worn water pump or alternator bearings can also cause this noise, especially noticeable at idle or during acceleration. My old car had a water pump issue, and the sound disappeared after replacing the component. Other causes include faulty radiator fan motors or intermittent operation of the AC system compressor. It's advisable to stop immediately and check belt tension and component conditions to avoid overheating during long drives. Lubricating bearings during repairs can extend their lifespan. Safety first—don't underestimate these sounds, as they might indicate impending cooling system failure. Early repairs save money and hassle.
