What Causes Engine Shaking, Loud Noise, and Abnormal Exhaust Sound?
2 Answers
Engine shaking, loud noise, and abnormal exhaust sound may be caused by the following reasons: Failure to change engine oil regularly: Conventional types of engine oil need to be changed every 5,000 kilometers, while higher-quality fully synthetic oil must also be replaced after reaching 7,000 to 8,000 kilometers. It is essential to change the oil on time and develop the habit of frequently checking the oil dipstick. Incorrect engine oil grade: It is best to use the same oil grade as the original factory oil. Avoid adding different oil grades arbitrarily, as different grades represent different oil viscosities. Oil that is too thin or too thick can cause the engine noise to increase. Shock absorber malfunction: Everyone knows the role of shock absorbers. You can usually feel the condition of your car's shock absorbers when going over speed bumps. When there is an issue with the shock absorbers, it can lead to increased engine noise.
I've encountered this issue too many times when repairing cars. Engine shaking is mostly caused by problems in the ignition system, such as aging spark plugs or burnt ignition coils, which can lead to unstable combustion. Excessive noise might be due to loose belts or a noisy fan belt. Exhaust system noises are most commonly caused by leaks in the exhaust pipe or a damaged muffler, creating a scary whooshing sound while driving. For inspection, first check if the spark plugs are carbon-fouled and look for cracks at the exhaust pipe joints. You might be able to fix it yourself, but don't delay too long as it could burn more components or even cause stalling accidents. Safety first—it's better to visit the shop early for a thorough check.
