Q: Weird dentist drill type noise from under hood after a cold start.

asked by on

After a cold start, I hear this weird dentist drill kind of sound from under the hood that goes away after a few seconds, I know it's not the serpentine belt.

Hi there. The noise sounds like the serpentine belt is slipping. Try removing the belt and see if the noise goes away. If the noise goes away, then either the belt is worn and needs replaced or the tensioner is not holding the belt tight and needs replaced. The only other thing that could be an issue is the bearings are wearing and have a lack of oil on startup. If you need further assistance with a high pitch noise on the engine, then seek out a professional, such as one from Your Mechanic, 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. Weird dentist drill type noise from under hood after a cold start.

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: HVAC controls don't work. All fuses are good and the relay works. there is still no power to HVAC unit.

Hi there. Check to see if there is power to the air conditioning controls. If there is power to the controls and there is power to the fuse and relay, then the air conditioning controls need replaced. If there is...

Q: Q: Steering wheel locked and key won't turn

Hi Patrice. Thanks to contacting us today. One thing that might be causing this issue - that was not mentioned is the brake switch. This component is a safety system that will lock the key in the ignition and the...

Q: Audio fuse keeps blowing after multiple attempts to change it.

Hello, thank you for writing in. When you jump-started the vehicle, you may have done damage to the radio. The radio itself may be continuously blowing the fuse as it is trying to turn on. You may want to try...

Related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.