3 Reasons Why Car Makes Humming Noise Only When Accelerating

Drivers always need to pay attention to some abnormal signs in their cars to handle them in time to prevent incidents.

The annoying car noise is one of the most common issues, especially humming noise only when accelerating.

This article will give you more information about that annoying humming noise, its causes, and solutions. Let’s keep reading to know!

What Is The Humming Noise When I Accelerate?  

Buzzing sound when accelerating means that this loud sound only appears whenever you try to speed up. This can be a concern for your vehicle.

Noise in cars is associated with a wide range of common issues. Pay attention and repair it as soon as possible if you don’t want to have any troubles while driving.

As a result, you should determine the noise source to take the necessary corrective measures. There are three basic reasons why a common car sounds like a lawn mower. Then, we will go over them in the next section.

The Main Reasons Why Car Makes Humming Noise When Accelerating

Why does my car hum when I accelerate? It can happen for many reasons, such as engine troubles, broken transmission, and steering issues. We will explain clearer in this section:

Reason 1: The Engine Issues

  • Leakage

To discover the damaged parts, we sometimes have to check the entire engine.

A leak in the power steering system or the exhaust system could be the cause of the humming sound from engine. You can fix them yourself or with the help of a mechanic.

  • Loose Belt

On the other hand, the belt is essential for driving the car’s tires. It will loosen for some reason. As a result, it will easily produce an annoyingly loud sound or do significant damage to the car.

  • Faulty Power System

There are two sorts of faults in car engine systems that lead to the noise issue. The first is a faulty power steering system, and the second is low-fluid-carrying.

To fix this, you simply add more liquid if the level is low, and your car will run normally.

Reason 2: The Transmission Issues

The second reason that can cause such rumbling noise in cars is the bad transmission issue:

  • Worn up gears of the transmission system

The engine of a car has several gears. Those gears will quickly wear out if you drive frequently.

As a result, when you try to accelerate your vehicle, it may make many differential noises and vibrations.

If you can not figure out which part of the transmission is damaged, you should seek mechanical guidance for the tough issue.

Such common noises will also happen if the fluid goes down badly. Excess air in the complete transmission line can generate noisy sounds.

Therefore, you should check the fluid in the car regularly. Right now, you should replace the transmission fluid with a high-quality version.

 Reason 3: The Steering Issues

The first issue is caused by a twisted steering wheel. A humming sound is produced if the steering wheel is not in its exact location when the vehicle speed increases.

The second issue involves loosening the steering belt. If this happens, you should replace the car’s steering belt with a high-quality one.

A faulty power steering pump is the third reason for low humming noises when accelerating. The reason is that frequent and severe revving can harm the steering pump.

Signs Related To The Humming Noise While Driving 

There are three typical signs to look for when identifying a car buzzing when accelerating. These indicators are essential since they reflect your vehicle’s condition.

I am not sure what would happen if you ignored them.

A persistent whining or humming sound is the first sign. The transmission is strained when you drive your car for long periods, especially if the vehicle has a loose bearing.

The drive belt is the second sign we would like to talk up. Common car noises connected to the drive belt will often get louder with increasing RPMs (Revolutions Per Minute).

Your car’s RPM level is closely related to noise nature. The greater the RPM, the more differential noise is produced, and vice versa.

A third signal is a noise that occurs only at highway speeds. As you change lanes or make lengthy, deep turns, common car noises that are only heard at highway speeds may change.

What To Do If Your Car Is Making A Buzzing Noise When Accelerating

Replace Wheel Bearings:

As mentioned before, wheel bearings tend to wear out after a long driving period. So you will need to replace the worn wheel bearings.

This decreases noise nature and improves the performance of the vehicle.

If you want to save money, you can do it yourself. However, you should take the car to the local garage due to the bad bearing’s small construction.

There are 12 simple steps to replace a wheel bearing:

• Check to see if your car is parked on a level surface.

• Wheel chocks are used to secure wheels whose bearings are not being replaced.

• Loosen the lug nuts and use a jack to elevate the wheel.

• Remove the wheel by unscrewing the lug nuts.

• Remove the caliper from the brake system.

• Clean all the dust is covering the cotter pin and castle nut.

• Remove the rotor from the engine.

• Remove the old hub by unscrewing the hub nuts.

• Remove the hub assembly and disassemble it.

• Clean the knuckle by removing the races.

• Replace the wheel bearings and the races.

• Assemble all of the parts in the opposite sequence.

Get Your Tires Balanced

Irregular wear and vibration on your worn tires may indicate that you need to balance them. If your steering wheel vibrates, it could be your front tire.

If the seat vibrates, the imbalance occurs in the rear wheel.

If you park your car for an extended period without moving, your tires may become unbalanced.

It is also because a rim hits a curb or pothole. We will show you how to balance tires to solve this problem.

All you have to do is bring your car in for routine tire balancing. After the tires have been fitted to the wheel, they are balanced.

The modern Auto & Tire Center uses a computerized spin balancing machine.

The computer detects imbalanced tires and informs where weights should be placed on the wheel. The technician puts thin metal pieces on the rim to counterbalance heavy locations.

Then, rotates the wheel once more to ensure correct balance.

The technician will examine your worn tires once you have done the tire balancing service with a calibrated rotary balancer. The balance of the tires will be restored following the test results.

Take The Vehicle For Diagnostics

If the previous two procedures fail to resolve the humming sounds, take your car to a local professional mechanic for a diagnosis.

The cost of auto diagnostics varies depending on the model car and the issues you are experiencing with your vehicle.


Is It Safe To Drive A Car With A Humming Noise?

A variety of factors can cause car hums when accelerating. As a result, driving such a car, especially on the highway, can be quite risky.

You can even end up damaging your beloved car. Therefore, you need to pay more attention to your companion to ensure your safety on every trip.

Can You Fix the Car’s Humming Noises by Yourself or See a Mechanic? 

The solution is dependent on the nature of tires or wheel bearing noise with your vehicle.  They need to determine what kind of problem your car is having. You can repair the driveshaft on your own if the problem is simple.

You may easily learn how to fix your car on videos, newspapers, and platforms. Those are the resources that are always updated that you can fix your car yourself at home.

If the problem is more complicated, such as wheel bearings, tire balance, or diagnostics, you should take your vehicle to a garage.

Furthermore,  You can also attend a workshop to gain the knowledge you need about your car.

How Much Would It Cost to Fix a Car’s Humming Noise?

Mechanics will keep the car running while using a stethoscope to locate the exact source of the noise once you have brought it to the auto repair shop.

If a faulty wheel bearing causes the problem, the average replacement cost in the UK is £200 per bearing.

If it is a bad tire, a visual check will reveal if it is in good condition. Wore tire replacements can cost $200 or more, not adding labor charges.

While some places promise to provide free auto diagnostics, most of them charge a hidden price. According to experts, you may expect to pay anything from $40 to $400 for a car.

In Summary

In short, this article has provided you with all the necessary information about the causes and solutions of humming noise only when accelerating.

When dealing with vehicle-related issues, you should always assess the best approach. This is because it directly affects your safety and other people’s.

Thus, remember to have your car have regular checks to prevent incidents

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