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Old 07-05-2012, 04:15 AM   #1
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Whining noise coming from engine area

Hi everyone. I'm new to the forum and this is my first post. I've tried searching the web for this issue but I can't seem to find a whole lot on it for my car.
I have developed a strange whining noise from my 2007 gt as of this evening. Kind of happened all of a sudden. The car is driving fine as usual and all functions seem to be working but the noise won't go away. Its most noticeable around 2500 rpm but gets mostly covered by the exhaust noise when driving. The noise happens throughout all gears, in neutral, and in park and the pitch seems to rise as the revs go up.
I've been trying to pinpoint where it's coming from and it's pretty difficult although I'm certain it's not the transmission as it hhappens in neutral as well. I've checked all of the pulleys and the drive belt and everything's in good order. I have a feeling that it could be the alternator but I'm not too sure. Electricall seems to be working and it's putting out over 13 volts when started. The car only has about 50000 km on it.

If any of you can provide some insight it would be very greatly appreciated.
Cheers,
John
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Old 07-05-2012, 07:15 AM   #2
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Welcome aboard.
When you're idling does it whine? How about when you turn the wheel while idling, does it get worse? If so, it's your power steering pump. Ford is notorious for having noisy pumps if that's it, you can replace it but a lot of aftermarket pumps brand new are noisy as well. You might have to pick that up from the dealer.
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Old 07-05-2012, 08:09 AM   #3
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Re: Whining noise coming from engine area

Is there a chance what you are hearing is not from the engine? A Bad ground will make this noise through the speakers as well. Is the whine loud enough to record?
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Old 07-05-2012, 08:49 AM   #4
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Hey guys. Thanks for the replies. The noise ddoes not change at all when I turn the wheels. It was one of the first things I checked with my research. Power steering seems to be alright. As for the ground issue I don't think that can be it either. It's not really a squealing like you would hear through the audio system ans it's definitely louder once I open the hood. Its loud enough for me to record it I will pull out the camcorder and take a quick video for you all to see in a couple hours. Maybe that will help! Thanks again!
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Old 07-05-2012, 11:20 AM   #5
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I had a very similar problem a while back. It turned out to be a very minor problem. It was one of my idler pulley's starting to go bad. Take your belt off and run your engine just to make sure it is coming from one of the pulley's. If the noise is gone them reinstall your belt and use an automotive stethoscope to pinpoint which pulley it is, if you're lucky like I was it will be one of the idlers or you belt tensioner which are inexpensive to repair.
Good luck!
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Old 07-05-2012, 12:08 PM   #6
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Just got my new charger in the mail from Panasonic as we speak. I've built a stethoscope and I will be posting a video as soon as I have some charge in the camera !
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Old 07-05-2012, 07:09 PM   #7
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Re: Whining noise coming from engine area

Alright. Sorry that took so long, dealing with 500 things at once!
So ive taken a video of the sound of the engine, and I also built a stethoscope out of an old shotgun mic and plugged it into the camera. I checked the pulleys and alternator with it and you can see the results in the latter half of the video. Pretty obvious what the problem is now I think. Thoughts?
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Old 07-05-2012, 08:49 PM   #8
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Alternator bearing
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Old 07-05-2012, 09:50 PM   #9
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Re: Whining noise coming from engine area

Quote:
Originally Posted by tc x 4 View Post
Alternator bearing
I agree.
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Old 07-05-2012, 10:08 PM   #10
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Quote:
Originally Posted by Borii

I agree.
Me too

---------- Post added at 11:08 PM ---------- Previous post was at 11:08 PM ----------

And, welcome to ME!
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Old 07-05-2012, 11:10 PM   #11
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Can the bearing be replaced or is it just best to do the whole alternator?
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Old 07-06-2012, 05:19 AM   #12
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Quote:
Originally Posted by johnb554
Can the bearing be replaced or is it just best to do the whole alternator?
Not shur on newer cars, but older ones you can. Probably be better off replacing the whole unit. These cars are known to have issues with the alternators.
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Old 05-05-2017, 05:39 PM   #13
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My 2006 Mustang also has a whining sound. I had a150 4.6 that had the same noise. It turned out to be the alternator. I replaced the alternator and belt on the Mustang but the noise did not stop. I suspect that it might be the power steering pump but I'd hate to invest money and time just to find out that that isn't it. any suggestions?
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Old 05-05-2017, 06:55 PM   #14
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You can take the hose off of your shop vac, put it up to your ear, then move it around your engine while running.. being careful of course. it will work like a Stethoscope.. I've done it for years, it works.. if the noise is there when in park and running..
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