What Causes the Engine to Roar Loudly When Accelerating?

[LeAlexander]

Possible reasons include excessive engine oil, incorrect oil type, engine overheating leading to loss of power, etc. Below is relevant information about engines: Introduction: An engine is a machine capable of converting non-mechanical energy into mechanical energy. Classification: Includes internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. External Combustion Engine: An external combustion engine refers to an engine where fuel burns outside the engine. Internal Combustion Engine: An internal combustion engine, or reciprocating piston engine, differs primarily from external combustion engines in that the fuel burns inside it. There are many types of internal combustion engines, with common gasoline and diesel engines being typical examples.

[OSara]

After driving this old car for so many years, the engine roars loudly every time I step on the accelerator, which is really annoying. Common causes include issues with the exhaust system, such as loose exhaust pipe connections or a damaged muffler, where exhaust gases escape directly and amplify the noise. Another reason could be a clogged air filter restricting airflow, forcing the engine to work harder and produce more noise. Worn-out spark plugs or faulty ignition coils can also lead to incomplete combustion, increasing the roaring sound. Additionally, engine wear or carbon buildup in the fuel system can make the operation noisier. Don't overlook that aggressive acceleration habits can worsen these problems over time. I recommend first checking the exhaust for any leaks, regularly replacing the air filter and engine oil, and fixing minor issues early to save big on repairs.

[TylerDella]

When I first drove this car, it was quite quiet, but later the roaring sound became increasingly loud, which felt abnormal. It's likely due to a perforated muffler or a cracked exhaust pipe, where the leaking exhaust gas creates a particularly loud noise. It could also be from frequently pressing the accelerator too hard, accelerating engine wear. Another possibility is a dirty throttle valve, causing the computer to misjudge and respond sluggishly, leading to the roaring sound. I've personally experienced that cleaning the throttle valve made it much quieter. It's advisable to develop a gentle driving habit, avoid hard acceleration, and perform regular maintenance to extend component lifespan. For exhaust issues, applying soapy water to the pipes to check for bubbles is a simple, cost-free diagnostic method.

[OAlyssa]

I commute by car every day, and the increase in engine roar is usually due to the accumulation of minor issues. Exhaust leaks are the most common, directly amplifying the noise. A damaged or mismatched muffler can also cause this. Additionally, carbon buildup leads to inefficient combustion, forcing the engine to roar louder. Check if the air filter and oil filter are dirty, as they can obstruct fuel and air intake, increasing noise. I usually solve this by replacing these inexpensive parts to avoid escalating into costly major repairs. Exhaust pipe corrosion is a hidden danger, especially in rainy regions, so early repairs can prevent further damage.