How to Solve the Problem of Loud Engine Acceleration Noise?

[DeJuliette]

Engine noise is generally caused by carbon deposits. There are several specific reasons for increased engine noise: 1. Aging or loosening of engine mounts. Engine mounts are rubber blocks between the engine and the frame. Solution: Tighten or replace the engine mounts. 2. Improper use of engine oil. If the viscosity of the engine oil does not match the engine, it can easily lead to carbon deposits, resulting in increased engine noise. Solution: Use the engine oil grade specified in the vehicle manual and avoid mixing different brands of engine oil. 3. Engine misfire. Engine misfire means one or more cylinders are not functioning properly. Solution: Check the condition of each ignition coil and cylinder spark plug.

[DiGiselle]

I just dealt with the issue of loud acceleration noise in my car last week. First, check the engine oil condition—aged oil can cause the engine to run roughly and produce roaring sounds. Next, inspect whether the air filter is clogged, as insufficient air intake can force the engine to work harder. Loose exhaust pipe connections can also cause abnormal noises. Last time, I found that a cracked exhaust pipe gasket was causing a sports-car-like roar during acceleration. Additionally, don’t forget to check the engine mount bushings—when they age, their damping effect weakens, and vibrations directly transmit into the cabin. Finally, if the vehicle’s mileage exceeds 80,000 km, the timing chain may have stretched and require replacement. I recommend troubleshooting from the easiest to the most complex tasks—changing the oil and oil filter yourself is straightforward, but other issues are best diagnosed by a professional mechanic.

[DelOmar]

My old car's engine sounds as loud as a tractor when accelerating. The mechanic taught me a few self-inspection methods: With the engine warmed up, pull out the dipstick—if the oil is black and clumpy, it's time for a change. Remove the air filter and hold it up to sunlight; if the light doesn't pass through well, replace it. Step on the gas while stationary to listen for the source of noise—a leaking exhaust pipe will produce a popping sound. If you hear metal clanging from the chassis when going over speed bumps, it's likely the engine guard plate is deformed and touching the chassis. If none of these are the issue, consider internal mechanical faults like excessive valve clearance or worn piston rings. Now, I change the oil every 5,000 kilometers without fail and regularly clean the throttle body. The engine runs much smoother, and when accelerating, all I hear is the smooth sound of the exhaust.

[SanAngela]

If the acceleration noise suddenly increases, focus on checking three areas. First, confirm whether low-grade gasoline has been recently used, as poor-quality fuel can cause knocking and produce a metallic tapping sound. Next, inspect the engine belt, as an aging belt may squeak during acceleration. Most importantly, check the engine oil level; insufficient oil can lead to hydraulic lifter noise. A colleague's car required a major repair costing several thousand due to oil burning and not topping up in time. If the noise appears right after maintenance, the oil viscosity might be unsuitable. Using 0W-30 in winter and 5W-40 in summer is the safest choice.

[CalvinMarie]

Engine acceleration noise usually stems from issues in the power output system. From my experience: if there's a humming sound when stepping on the accelerator, check the alternator pulley bearing; a ticking noise suggests possible hydraulic lifter problems; a low roaring sound may indicate a damaged mid-section muffler in the exhaust pipe. Last time my car had steering wheel vibration during acceleration, and it turned out to be completely failed engine mounts. Additionally, tires can be hidden noise sources - excessively worn tires can produce engine-like roaring during acceleration. I recommend developing these habits: listen to idle sounds during cold starts, pay attention to acceleration sound quality while driving, and regularly record engine sounds with your phone for easier comparison when abnormalities occur.