What's the matter with the engine noise?
2 Answers
Normally, there is sound when the engine starts, but it depends on whether the volume of the sound is within the normal range. If the engine noise is too loud, it needs to be analyzed and addressed. If you press the accelerator and find that acceleration is not obvious, there is a lack of power, and the engine makes a hysterical noise, it may occur when the engine is hot, cold, or when it is low on oil. The causes of such issues may include problems with the air filter, spark plugs, ignition wires, gasoline, fuel filter, carburetor, fuel pump, etc. Below is an introduction to engine protectants: 1. Introduction to engine protectants: Engine protectants, also known as engine anti-wear protectants, are agents that effectively reduce wear or corrosion of engine components, inhibit the formation of deposits such as gum and sludge, and can form a protective layer on metal surfaces with high compressive strength and good wear resistance. They prevent engine oil from oxidizing, thickening, or acidifying, thereby protecting engine components and extending the engine's lifespan. 2. Functions of engine protectants: The functions of engine protectants include anti-wear, lubrication, noise reduction, improving engine power, and saving fuel. Some also prevent oil burning and have functions like cleaning carbon deposits.
When driving, I always pay attention to mechanical sounds. If you hear unusual noises from the engine, keep an eye on these points: The most common issue is a loose belt, which produces a very noticeable squeaking sound. Another possibility is insufficient engine oil causing dry friction, resulting in a metallic grinding noise—check the dipstick immediately. A loose exhaust system connection may create a puffing or hissing sound due to air leakage. In older cars, a dull knocking noise could indicate a failed connecting rod bearing. I remember once my car suddenly made a ticking noise on the highway. After pulling over, I found the valve lifters were low on oil—topping it up in time prevented cylinder damage. Never ignore abnormal sounds; the earlier you inspect and repair, the lower the cost. Especially if a belt snaps or there’s an oil issue, it can trigger a chain reaction of failures.
