What Causes Abnormal Noises Inside the Engine?
2 Answers
There are many reasons for abnormal noises in a car engine, which may include engine overheating, exhaust system blockage, vacuum tube leakage, or breakage, among others. Engine Overheating: Excessive engine temperature can cause the lubricating oil to deteriorate, burn, and form deposits, losing its lubricating properties and damaging the oil film. This intensifies the friction and wear of components. It also disrupts the normal operating clearances between moving parts, increasing frictional resistance and accelerating wear, especially between the piston rings and cylinder walls. In severe cases, this can lead to scorching, seizure, engine stalling, or cylinder scoring. Exhaust System Blockage: When a car's exhaust pipe is blocked, corresponding fault symptoms will appear depending on the severity of the blockage. For example: the car may struggle to accelerate, have difficulty increasing engine RPM and speed, exhibit slight backfiring during sudden acceleration, or fail to start despite proper fuel injection, ignition, and sufficient compression pressure. These are typically symptoms of a completely blocked exhaust system. Vacuum Tube Leakage: If there is a leak in the car's intake system, the engine will exhibit noticeable shaking. You can start with simple checks, such as listening for any hissing sounds of air leakage or trying to wiggle the connections of various hoses to see if the engine RPM changes. If there is a change, it can be determined that there is a leak at that point.
Recently, my car's engine has been making strange noises, which are quite unsettling. There are actually many possible causes for abnormal engine sounds. The most common is a loose or worn belt—aging belts can produce squeaking noises, and replacing them with new ones can help. Another issue could be the engine oil—if the oil level is too low or the oil has degraded, insufficient lubrication can lead to increased friction and knocking sounds. Additionally, internal components like bearings or piston rings, if worn out, can cause the engine to make loud noises during acceleration. I remember my neighbor's car had this issue last week, and it turned out to be a faulty water pump. If you hear any unusual sounds, don't delay—visit a repair shop immediately. Safety comes first, as minor issues can escalate into major problems. Regular maintenance is crucial—changing the engine oil and inspecting the belts should be done at least once a year.
