Skip the auto shop - Our mechanics make house calls

Q: Vehicle makes whistling noise when warm

asked by on

When the vehicle is warm, it makes a loud, high-pitched whistling noise from under the hood. It sounds like a vacuum leak.

A vacuum leak is a possibility but another possibility would be an exhaust leak. Both can cause a whistling noise when the engine heats up. A vacuum leak is more likely to change with engine speed. A qualified technician, like one from YourMechanic, will be able to perform an inspection and a vacuum test to determine where the noise is coming from.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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. Vehicle makes whistling noise when warm

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: Fuel pump shuts off, cranks back up a few minutes later.

Hello, thank you for writing in. The fuel pump is definitely one of the components that will cause your symptoms. The fuel gauge sending you false information is one of the big indicators there is an issue with the module....

Q: What do you think could be wrong?

Hi there: What you're describing appears to be a problem with the serpentine belt; which powers many of your vehicle's components including the alternator, power steering, and air conditioning systems. When the belt or the pulley's that turn the belt...

Q: Jeep died while driving on freeway

Hi there. The engine dying could be caused from many different things. A proper diagnosis needs to be performed on the car where a technician can test the battery, fuel pressure, computer codes and many other things. I would recommend...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...