Q: Car producing loud hum when accelerating, engine stalls before starting up

asked by on

Hello, during an oil change I was informed that my serpentine belt was almost due to be replaced. They told me that if the car started to make squealing sounds, I would definitely need it replaced. At the time I wasn't prepared to pay to have the replacement done so I told them I would have it done another time. I'm not sure if the noises I hear now are from the serpentine belt, but when I accelerate, it almost sounds as though the car is missing a gear and hums (almost like an airplane). Trying to go from stopped to going uphill also produces sounds...but it is more of a squealing than a hum. I am more than willing to get the belt replaced, but I'm wondering if it is the same problem. Turning the car on sometimes takes a minute or two before the engine rolls over to start (battery has just had recent maintenance). Any advice is appreciated

My car has 78000 miles.
My car has an automatic transmission.

I believe the humming sound you are hearing could be related to a faulty wheel bearing. When wheel bearings dry out they will begin to make humming or growling noises when the vehicle is accelerating.

I would recommend having your wheel bearings inspected by a qualified mechanic, such as one from YourMechanic, to determine the cause of the humming sound.

As for the squealing sound, this could very well be the serpentine belt. I would recommend having that replaced as well if it is making noises or has cracks in it.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car producing loud hum when accelerating, engine stalls before starting up

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Belt making noise

As cars age even the most well maintained automobile will need some work. If the noise is from the belt or one of its accessories, then it can be easily confirmed. Removing the belt and restarting will let you know...

Q: AWD light stays on and I just had all 4 tires changed by a mechanic.

Hi there. The AWD light is coming on for the sensors on the wheels are picking up different tire rotational speeds. If you are putting on used tires and not new tires, then you will need to check the tire...

Q: Wheel bearing replacement for pressed in wheel bearing

Yes, you can replace a wheel bearing that is pressed in, however this usually requires a hydraulic press n order to remove and replace the bearing. Alternatively, you may remove the hub and take it to a machine shop or...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.