Car Engine Noises When Accelerating? Here Are the Causes & Solutions

There are various factors that cause a car engine to sound rough when accelerating. Generally, this is closely related to the AC, oil, and other engine components. Usually, this sound resembles the noise of metal friction.

Even when the car is already running, this noisy sound can still be heard when pressing the gas pedal. If this happens, make sure to find out the cause immediately and then make the necessary repairs.

6 Causes of a Rough Car Engine Sound When Accelerating

Driving with a rough-sounding car is certainly uncomfortable. Here are the causes of the rough sound when accelerating along with their solutions, including:

1. AC Compressor

The cause of a rough car engine sound when first started or even while driving can be due to a problematic AC compressor and too much dirt or insufficient oil. This rough sound will be very loud when the car is started.

To address this, you can clean or flush the compressor. If the component has been cleaned but the rough sound persists, you may need to check again as there could be components that need to be replaced.

2. Engine Oil

Another issue that causes a rough car sound when accelerating is insufficient oil volume or poor oil quality. To check this, you can look at the dipstick of the oil tank.

This step can also be used to check the oil quality. Of course, quality oil has a clear color, while poor quality oil has a brownish and black color due to dirt mixing with the oil.

Generally, a rough engine sound when accelerating can also be caused by valve issues. Therefore, check for any leaks.

3. Engine Oil Pump

Still closely related to oil. If the oil condition is still good, the cause of the rough sound could be a problematic pump. The oil pump works by pumping from the lower filter to all engine components.

A problematic pump generally cannot circulate oil to all components in the engine. To resolve this, you can check this component. If there is damage, the component must be replaced immediately.

4. Vehicle Belt

Don't be mistaken, the vehicle belt can also be the root cause of the rough sound in the car engine. The vehicle belt is the fan belt connecting one pulley to another.

Generally, the issues arise due to dust blockage, improper size, and dry fan belts. If the fan belt is dry or improperly sized, it will sound like a squeak.

5. Incomplete Combustion

Incomplete combustion issues can also cause a rattling sound and make the engine sound rough. To fix the rough sound due to incompleteness, you must use fuel that matches the octane rating and is in accordance with the manufacturer's recommendations.

6. Gap in Engine Valves

Another cause of a rough car engine sound is a gap in the engine valves. The valve gap should not be too tight or too loose. However, if used frequently, the valve gap will become loose.

If the various methods above do not resolve the rough car sound when accelerating, you should take the vehicle to an official workshop.

Make sure to take your car to an official Daihatsu workshop for further handling. Handled by professional mechanics, all issues with your car will be resolved properly.

Tips Sahabat