Whine on acceleration?

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#11

08-30-2010, 08:11 AM

nitehawkjcb

Monte Of The Month -- April 2012
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Join Date: Sep 2008

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Quote:

Originally Posted by DeanMachine

I do remember reading that somewhere. But I made a special point to have Chevy check what they thought the whine was when the car went in for some sensor replacements the other day, and they said on their receipt that it wasn't a problem and there weren't any issues.

That said, I don't want to rule out the possibility...is there any way I can visually check the alternator on my own? What signs am I looking for that it's going bad?

No, you can't visually check the alternator. You have to take it off and have it tested at a parts store.

#12

08-30-2010, 09:47 AM

DeanMachine

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Join Date: Aug 2010

Location: Philadelphia, PA

Posts: 134

Quote:

Originally Posted by labnjab

Sounds to me like your power steering pump. Sometimes they just get noisy, even when the fluid is full. I can hear mine sometimes. Its nothing to worry about if it is a noisy pump. Can you possibly get a sound clip of it?

Yeah, I'll try and get one up here later today.

#13

08-30-2010, 10:04 AM

saigashooter

Join Date: Jan 2008

Location: Stevens Point, WI

Posts: 385

Does the whine change in pitch during acceleration, and abruptly stop when there is a gear change, and then start whining again as you keep accelerating?

#14

08-30-2010, 10:05 AM

labnjab

Join Date: Jun 2009

Location: New Hampshire

Posts: 435

One way to rule out transmission is to remove your drive belt and start it up. If the noise goes away then you know its something belt driven

#15

08-30-2010, 12:04 PM

DeanMachine

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Join Date: Aug 2010

Location: Philadelphia, PA

Posts: 134

Quote:

Originally Posted by saigashooter

Does the whine change in pitch during acceleration, and abruptly stop when there is a gear change, and then start whining again as you keep accelerating?

Yes to the first part. It becomes a higher pitch the higher the RPMs go.

#16

08-30-2010, 06:19 PM

DeanMachine

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Join Date: Aug 2010

Location: Philadelphia, PA

Posts: 134

This is my car. I took this video this afternoon. It definitely sounds like something having to do with the belts...hence me focusing on them the whole time.

Thoughts?

http://www.youtube.com/watch?v=s4azFn1SOdw

#17

08-30-2010, 06:58 PM

lougreen03

Monte Of The Month -- March 2013

Join Date: Jun 2010

Location: michigan

Posts: 8,442

I Would say alternator. I had a re manufactured one with bad bearings made a very smiler noise

#18

08-30-2010, 07:10 PM

DeanMachine

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Join Date: Aug 2010

Location: Philadelphia, PA

Posts: 134

How much would you estimate replacing the alternator costs?

#19

09-07-2010, 02:35 AM

Beautikill.2000monte

Join Date: Jul 2010

Location: middletown,ohio

Posts: 54

buy a new serpentine belt, if its stretched it will squeal, if it sounds like a supercharger then its your tranny. Alternators dont just slowly go out, they either work or dont work, if it dont work it, then your car wont run. Power steering pump should only make noise when your turning and that wont get louder just because you get on the gas. if your giong in a straight line acceleration and it gets louder with more rpm, its only one of two things. stretched serpentine belt or tranny to have looking at.