What are the solutions for excessive engine noise?
3 Answers
Here are the detailed causes and solutions for excessive engine noise: 1. The car has been driven for too many years with excessive wear, causing excessive clearance in the transmission system and resulting in vibration and abnormal noise. Solution: Perform a comprehensive overhaul or scrap the vehicle. 2. The transmission V-belt is too loose, causing fluttering or slipping and producing sharp noise. Solution: Adjust the tightness of the transmission V-belt. 3. Excessive carbon deposits in the engine cylinders lead to poor combustion, producing a noise similar to that of a tractor. Solution: Clean the carbon deposits in the cylinders. 4. Check if any bearings are damaged, as damaged bearings will produce a buzzing noise. Solution: Replace the bearings. 5. Poor fuel quality leads to poor combustion, causing the engine to produce a popping noise. Solution: Use high-quality fuel. 6. Excessive engine noise may be related to unsuitable or dirty engine oil. Solution: Change the engine oil.
My old car's engine was as noisy as a tractor, and it turned out the engine mount rubber bushings had deteriorated. The repair shop said these rubber parts tend to harden and crack after five or six years of use – replacing them immediately made it much quieter. However, the mechanic reminded me to pay more attention to the engine oil condition; incorrect viscosity or excessive sludge can cause dry friction in the engine. Also, if the engine undercover becomes loose, it can cause resonance noise, so I always have them check the fastening screws during maintenance. Now, I wait for the RPM to stabilize before driving off during cold starts to treat the engine more gently.
Recently noticed loud noise during acceleration, and found the exhaust pipe gasket was damaged during inspection. The mechanic said many cars develop deformed/leaky gaskets over time, especially those with aftermarket exhaust modifications. He also taught me to regularly inspect engine components - for example, a failing tensioner pulley bearing makes a sandy sound, while an overtightened belt causes squealing. Changed to full synthetic oil too, and the piston movement feels noticeably smoother. BTW, excessive spark plug carbon buildup can also cause abnormal combustion and increased noise, which many owners overlook.
