Q: Squealing when decelerating

asked by on

My car has a mileage of about 160,000 miles. When I'm driving and decreasing the speed, I can hear an annoying squealing noise. It seems to be coming from the front of the engine. I had the serpentine belt replaced very recently, at 155,000 miles. It is a metal-like sound that occurs when I drive the car for about 20 miles upon speed decrease. The squealing disappears when I give it gas or rev the engine. I had check the following parts: pulleys, water pump, belt and idler. There are no leaks. What could be making this noise?

Hello. Thanks for writing in about your 2000 Porsche Boxster. Most of the time this is caused by the pilot bearing in the rear of the crankshaft. When it fails it will make this noise at these times. I usually pull the engine drive belt off and start of the vehicle to see if the noise goes away. If it remains, then this is the problem. If you want to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the squealing noise and let you know what repairs are needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Squealing when decelerating

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: Jerking while shifting during deceleration - 1989 Cadillac Brougham

Hey there. The EGR system may get carbon in it causing the jerking on deceleration. Try decarbonizing the engine to see if it helps. You may need to remove the EGR valve and clear out excess carbon from the passages....

Q: My vehicle keeps overheating.

Hi there. The overheating condition could be caused by three different things on your vehicle. Plugged Radiator Water pump failure Burned head gasket The radiator could be plugged up causing the coolant to not flow when the engine...

Q: Engine light still on after replacing the gas cap

This is a simple fix. Replace the fuel cap. The cap sometimes does not reseal after refueling causing the system to detect a leak. Make sure the cap is sealing after you refuel and make sure the vehicle is turned...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...