Engine whining on startup

[Blueychan]

Anyone knows what's the cause of this:
http://www.youtube.com/watch?v=Y5gFsaRoaoU&feature=plcp

After changing the alternator a month ago, I get this whine whenever I start the engine. Usually after 15min, the noise is less noticeable be still there.

 

[iamwiz82]

Well it definitely sounds like a generator. Where did you get the alternator from? Warranty?

 

[JCH13]

Use a mechanic's stethoscope to determine the exact component the noise is coming from.

 

[LTC8K6]

Tensioner?

 

[Blueychan]

Well it definitely sounds like a generator. Where did you get the alternator from? Warranty?

so you think it's the generator and not the belt? I got my alternator replace by NTB, I will bring it back this weekend to see what they say.

Thanks

 

[JCH13]

It sounds like a bearing, but I'd bet it's not the brand new ones in the alternator. I bet the belt was over-tensioned when the alternator was reinstalled and an older worn-out bearing is starting to fail. The sound might go away as the belt heats up and lengthens.

 

[jagec]

Well it definitely sounds like a generator. Where did you get the alternator from? Warranty?

I doubt he has a generator in such a new car.

 

[ProchargeMe]

Sounds like a pulley or a bearing. Cheap fix, just take it to a good shop, you should be in and out for less than $20

 

[SpatiallyAware]

Where did you buy the alternator? If 'lifetime warranty' from advance or autozone, my money is on a bad alt right out of the box.

 

[iamwiz82]

I doubt he has a generator in such a new car.

That was my point :biggrin: