Skip the auto shop - Our mechanics make house calls

Q: Source of a whistling sound

asked by on

So I have this problem with my car. It makes a loud whistling sound but ONLY on the first start up of the day. I drive it around for a while and even restart it (I'm a delivery driver so I drive it often) and I never hear the sound again until the next day or when it cools down significantly. I believe it is a belt problem but I've gotten a few mixed replies online and wanted another opinion.

Hello, thank you for writing in. When dealing with something like this, the best thing to do is have someone else start the vehicle and listen carefully to try and pinpoint exactly where it is coming from. If the belts are the issue, there are several things you can do to try and quite them down. If the noise is truly a "whistle", or air escaping somewhere, the culprit is likely an exhaust gasket, vacuum leak, or EGR issue. Without performing an inspection, its almost impossible to tell. You want to think about all of the components that will expand when the car heats up. There are several components that will expand to make a proper seal and seat properly once warm air or fluid has be run through them. For more help with diagnosing where the noise is coming from contact our service department.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: 2009 NISSAN ALTIMA TRIED JUMPING AC COMPRESSOR FROM DRYER CNISTER WHILE CAR WAS RUNNING WHEN HE TOUCHED THE PRONGS TOGETHER THE CA

I can think of a few things. First off, was the jumper wire removed? if the a/c compressor is seized and the jumper wire is still in place sending direct power to it, it can prevent the vehicle from starting....

Q: How to turn reverse beep off

Hi and thanks for contacting YourMechanic. When it comes to removing the beep for letting the driver know that the transmission is in reverse, the timing for removing the beep is crucial. Press on the brake an hold it. Press...

Q: Recall for Catalytic Converter on my 2003 Nissan Sentra

Hello. On most vehicles the catalytic converter can usually be covered for the first 10 years or 100,000 miles. Once you surpass either of these, the converter will not be covered whether it is under warranty or recall. If you...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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.