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Old 05-05-2018, 09:15 AM   #1
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Whining noise at 2900rpm

Iíd appreciate some advice. Thanks in advance. I have a high pitch whine above 2900 rpms. Hereís what I know so far

Definitely in the engine bay.
Alternator is charging at 14.1 V
Itís not the SAI system
Doesnít seem to affect the running of the car

Any ideas what this could be?

98 2.5L 5 speed
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Old 05-06-2018, 06:26 AM   #2
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I’d appreciate some advice. Thanks in advance. I have a high pitch whine above 2900 rpms. Here’s what I know so far

Definitely in the engine bay.
Alternator is charging at 14.1 V
It’s not the SAI system
Doesn’t seem to affect the running of the car

Any ideas what this could be?

98 2.5L 5 speed
Anyone in the passenger seat? My wife has been known to make whining sounds ~5500RPM. YMMV.
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Old 05-06-2018, 06:39 AM   #3
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Apart from wife, i have one that whines while sitting on couch even, could be a water pump bearing or other bearing in the main belt ie ac pump, tensioner.
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Old 05-06-2018, 10:55 AM   #4
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Originally Posted by chemistone82 View Post
Iíd appreciate some advice. Thanks in advance. I have a high pitch whine above 2900 rpms. Hereís what I know so far

Definitely in the engine bay.
Alternator is charging at 14.1 V
Itís not the SAI system
Doesnít seem to affect the running of the car

Any ideas what this could be?

98 2.5L 5 speed
Remove the serpentine belt to see if the noise goes away, if it does the cause is a noisy pulley or water pump. If you detect any looseness or leakage from water pump replace with a new Pierburg pump.
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Old 05-06-2018, 09:26 PM   #5
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Power steering pump? Low on fluid?
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Old 05-17-2018, 11:08 AM   #6
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Well got it diagnosed at the shop. Bad belt tensioner and water pump.
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Old 05-17-2018, 02:29 PM   #7
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Well got it diagnosed at the shop. Bad belt tensioner and water pump.
Well at least that is a common issue, and sounds like you found it before it imploded inside.
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