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  #1  
Old February 18th, 2006, 17:18
Mikel's Avatar
Mikel Mikel is offline
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whining noise

Hello,
My 95 (4.0 5sp) has started to make a wistling whiny noise that is RPM-dependent. It starts as a soft wistle and will go away all of the sudden. I have not been able to point out what's causing it, but seems to come from the A/C pump, alternator or water pump area. The A/C pump is not turning, and turning the A/C on makes no difference. I'm starting to think a bearing in the alternator may be going bad, or maybe in the water pump. But why would the noise go away so suddenly? What could be causing this?
Thanks,
Mikel
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  #2  
Old February 18th, 2006, 20:21
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reddragon72 reddragon72 is offline
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Re: whining noise

I have the same thing, maybe, but I can only hear it in the car while taking off from a light and then cruseing at around 20-30MPH at 1300RMPs. It is very easy to hear and everyone can hear it. It just sound like a light whistle. I have yet to find it.
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Old February 18th, 2006, 21:25
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Matthew Currie Matthew Currie is offline
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Re: whining noise

Check the idler pulleys. They can make a noise that comes and goes. The little flat-surfaced one at the top is usually the first to fail. In my experience the water pump is more likely to rattle, and sound similar to piston slap.
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Old March 11th, 2006, 04:48
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Mikel Mikel is offline
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Re: whining noise

Just for the record, the noise has been gone for the last couple of weeks. I guess now I'll have to wait until something breaks to locate the problem
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Old March 11th, 2006, 07:16
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SCW SCW is offline
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Re: whining noise

Quote:
Originally Posted by Mikel
Just for the record, the noise has been gone for the last couple of weeks. I guess now I'll have to wait until something breaks to locate the problem
Was your wife in the passener seat? That contributes to a lot of whining noise in my Jeep
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  #6  
Old March 11th, 2006, 12:04
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Mikel Mikel is offline
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Re: whining noise

I'm single... Most of the whining I hear stops when I stop the engine

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Originally Posted by SCW
Was your wife in the passener seat? That contributes to a lot of whining noise in my Jeep
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