What Does Engine Abnormal Noise Sound Like?

[Mckenzie]

There are various types of abnormal engine noises, which can be attributed to the following specific causes: 1. If a 'clicking' or 'tapping' sound is heard from the upper part of the engine, with a regular rhythm and frequency that increases with engine speed, this noise primarily stems from the collision between the piston top and the cylinder head. 2. When a 'clunking' or 'tapping' sound is heard from the side of the engine block during operation, it usually indicates a knocking fault in the engine. 3. If the engine produces a 'clunking' sound, it suggests insufficient lubrication between the cylinder and the cylinder liner. 4. If the knocking sound is more of a 'tapping' noise, it likely indicates issues such as piston wear or out-of-roundness.

[WilliamDella]

Having worked on cars for many years, I often hear various engine abnormal noises. The most common is the clattering knocking sound, like a small hammer tapping inside, usually caused by loose pistons or valves, which becomes more noticeable at high speeds. The high-pitched squealing comes from loose belts or worn water pump bearings, and the squeaking gets louder when the air conditioning is on. The humming roar might indicate issues with the driveshaft or connecting rod bearings, most noticeable at low RPMs. Occasionally, there's a puffing snoring sound, signaling spark plug failure or fuel line blockage. These sounds all warn of deteriorating components, and ignoring them could lead to engine failure. Early diagnosis with professional equipment can save thousands in repair costs. Pay extra attention to idle sounds when driving older cars for more worry-free maintenance.

[RosalieMarie]

My old car suddenly started making a ticking noise last week, like someone was tapping inside. The sound got louder at high speeds. At first, I didn't pay much attention, but the next day when I started it, I heard a whining moan. I took it to a mechanic for inspection, and it turned out the crankshaft bearings were severely worn. After replacing them, the issue was resolved. The noise was really annoying, especially when accelerating uphill—it felt like the engine was protesting. Now, I'm immediately alert to any unusual sounds because they might indicate a part is about to fail. Addressing issues early not only saves money but also prevents the risk of breaking down on the highway. Simply listening to the engine idle can give a preliminary idea of potential problems.

[RowanMarie]

Engine noises vary widely. A ticking sound may indicate piston issues; squealing often stems from loose belts or pulleys; a humming noise points to bearing failure; while popping sounds are frequently caused by spark plug abnormalities. These sounds become more pronounced during acceleration or idling, acting like warning lights urging prompt inspection. Ignoring them can turn minor issues into major problems—for instance, squealing may lead to belt breakage. Pay extra attention to sound changes during routine car washes and address repairs early on.