Q: I just got my serpentine belt replaced and it's squealing when I start the car and sometimes when I hit the gas

asked by on

I just got my serpentine belt replaced and it's squealing when I start the car and sometimes when I hit the gas what is this do I need a fan belt??

My car has 134000 miles.

Noise of that type is due to a failed or failing bearing in one of the pulleys or accessories (e.g., alternator, water pump, A/C compressor) that is driven by the serpentine belt, the belt is not properly tensioned, or the rotating pulleys driven by the belt are not all in the same plane. I would first check to make sure that all of the pulleys are aligned. It is not unusual, for the pulley on the crankshaft harmonic balancer pulley to move (generally outward) relative to its original position. The pulley is rubber bonded and over time can move. If that pulley moves, that means that the belt groves are no longer running in a perfect plane and that alone can cause noise. With regard to the various ball bearing (and greased) mounted pulleys and accessory pulleys, the grease in those bearings eventually dries out and that can contribute to or cause noise of the type you are describing. If you request serpentine belt inspection - noise diagnostic a certified Mechanic, dispatched by YourMechanic right to your location, will identify the origin of the noise that you are hearing and thence get the issue resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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. I just got my serpentine belt replaced and it's squealing when I start the car and sometimes when I hit the gas

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: ABS Light, Check Engine Light, and squeal

Hi there. There could be a squeak from the serpentine belt. Also, check the brake system for any sticking brakes that could cause a squeaking sound. For the light coming back on for the mass air flow sensor, check the...

Q: Bluish white smoke during smog, did not pass. Does stop smoke fix the problem?

Hi there. In most cases, bluish white smoke is caused by damaged piston rings, or damaged cylinder head valve guides and is referred to as oil blow back. I am not a believer in "stop smoke" products, as they typically...

Q: Serpentine belt came off of 2006 BMW 325i

The serpentine belt tensioner and idler pulleys will need to be replaced when replacing the belt. The tensioner will not hold tension on the belt and the pulleys may be worn and allowed the belt to ride off. I recommend...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...