What Causes Loud Engine Noise in Cars?
2 Answers
Car engine noise can be caused by: 1. Insufficient engine oil; 2. Aging engine mounts; 3. Excessive carbon buildup in the engine; 4. Deteriorated sound insulation strips. Engine maintenance methods include: 1. Using high-quality engine oil; 2. Using qualified coolant; 3. Regularly cleaning radiator scale; 4. Periodic engine carbon removal; 5. Timely replacement of air filters, oil filters, and fuel filters; 6. Checking for damaged spark plugs. The engine's function is to convert the thermal energy of gasoline into mechanical energy by burning and expanding gas in a sealed cylinder to drive the piston.
Having driven multiple cars for over a decade, I've learned that excessive engine noise usually starts with basic maintenance checks. Degraded or insufficient engine oil is the prime suspect – poor lubrication makes the engine hum like an off-key singer. Next, inspect the belts; worn tensioners or drive belts will produce squeaky sounds. A DIY check is simple: listen for the noise source during startup to pinpoint the issue. Don’t overlook a loose exhaust system either – excessive vibration from the pipes can be deafening. A clogged air filter also strains the engine, causing a sharp rise in noise. Always change oil and filters during routine maintenance, as regular checks prevent problems. Top up with high-quality oil if levels are low – this alone can reduce noise by 80-90%. Replace belts immediately if cracks appear to avoid costly repairs later. Acting on unusual sounds early saves money and ensures peace of mind.
