What Causes the Loud Roaring Sound When Accelerating?
3 Answers
The loud roaring sound when accelerating can be attributed to the following reasons: 1. Engine Oil: Overfilling the engine oil increases the instantaneous working resistance of the engine, which raises the rotational resistance of the crankshaft and reduces the engine's power output. Additionally, excess oil may enter the combustion chamber and participate in combustion, leading to oil burning, blue smoke emission, and increased fuel consumption. 2. Engine Oil Type: Counterfeit or substandard engine oil can cause significant damage to the engine. Using the oil type recommended in the maintenance manual is generally safe. 3. Engine: Overheating of the engine can result in a loss of power. If the engine operates for an extended period, causing the surface to overheat, the cooling system may fail. The first step in such a situation is to check the cooling system. If the cooling system malfunctions, it could lead to exhaust blockage, as the vacuum tube may break. In this case, steam or hot air may escape from the engine, producing loud noises.
A loud engine roar when stepping on the accelerator is actually quite common, just like my old car used to sound. It's usually caused by issues in the exhaust system, such as an aging muffler with leaks or loose exhaust pipe connections, which amplify the sound when exhaust gases escape. It could also be due to a dirty air filter restricting airflow, forcing the engine to work harder to draw in air and creating more noise. In terms of the drivetrain, worn transmission gears or a loose chain can produce friction noises during rotation. Additionally, loose engine mounts made of rubber can cause the entire engine to vibrate excessively when accelerating. This noise isn't just annoying; it could also affect driving safety, so it's important to get it checked promptly. I recommend having a mechanic use a stethoscope to pinpoint the exact source of the problem to avoid minor issues turning into major repairs.
My car was exactly like this last time, it made a loud rumbling noise when I stepped on the gas. The mechanic said the most common causes are a cracked or corroded exhaust muffler, where escaping exhaust gases make the noise much louder. If the air filter is clogged, the engine can't get enough air, making more noise when the RPM spikes. Worn tires or bad road conditions can also be drowned out by engine noise, making it seem louder. Don't forget to check the engine oil level, as low levels lead to poor lubrication and increased operating noise. After regularly changing the air filter and muffler, it became much quieter—low cost but very effective. Driving habits also matter; always flooring the gas pedal makes the engine roar louder.
