What Causes Excessive Engine Noise in Cars?

[Dorothy]

Excessive engine noise in cars can be attributed to the following reasons: 1. Insufficient engine oil; 2. Aging engine mounts; 3. Increased carbon buildup in the engine; 4. Deteriorated soundproofing seals. Engine maintenance methods include: 1. Using high-quality engine oil; 2. Using qualified coolant; 3. Regularly cleaning radiator scale; 4. Periodically removing carbon deposits from the engine; 5. Timely replacement of the vehicle's air filter, oil filter, and fuel filter; 6. Checking for damaged spark plugs. The function of an engine is to convert the thermal energy of gasoline into mechanical energy by burning the fuel in a sealed cylinder, causing gas expansion that pushes the piston to perform work.

[OliveLee]

Increased engine noise is quite common. I've experienced situations where the oil was too thin or hadn't been changed for too long, leading to poor lubrication and causing the pistons and bearings to make a clattering sound. Improper valve adjustment with excessive clearance results in sharp opening and closing noises; leaking exhaust system joints produce an annoying hissing sound. Squealing from loose or aged cracked belts is easy to identify. Regularly checking the oil condition, exhaust pipes, and belt tension is quite important. If left unrepaired for a long time, the noise worsens and accelerates wear, increasing the risk of engine damage, which can lead to hefty repair costs. My personal advice is to stop and check as soon as any unusual noise is heard, and don't delay until it becomes severe.

[OElisa]

Last time I was driving, the engine suddenly became much noisier. Upon inspection, it was found that the spark plugs were worn out, causing ignition issues and producing a thumping vibration sound. It could also be due to insufficient engine oil increasing friction and making louder noises, or damaged engine mounts causing severe vehicle vibration. The puffing sound from exhaust leaks really affects the mood. If you feel the steering wheel shaking while driving, go to the repair shop immediately. Small neglects may evolve into major problems, such as loosened chains or worn-out bearings leading to even louder noises, affecting safety and fuel consumption. Maintaining regular maintenance habits can prevent these issues.

[DeSamantha]

Increased engine noise is often caused by simple issues. A loose belt squeals when accelerating, just tighten it. Exhaust leaks produce a popping sound that sounds broken. Thin oil leads to insufficient lubrication and loud friction noises, switch to thicker oil for improvement. Incorrect valve clearance causes noticeable clicking sounds. A loose chain rattles and affects operation. If you notice unusual noises while driving, locate the source and investigate or consult a mechanic. For prevention, regularly check the oil condition and replace it. Ignoring loud noises increases wear and can lead to costly long-term damage.