2009 Saturn Astra Whistling noise

2009 SATURN ASTRA
52,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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CURTISSM
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Hey there,
So my car has a slight high pitch whistling noise when i start it up and when i go it seems to persist when im either speeding up or maintaining a constant speed. The sound is most noticeable and almost becomes like a warbling whistle at about 3000rpm. Not sure what it is, any ideas? a friend suggested that it may have to do with some oil leak or a torn diaphragm or something but i really dont know.
Nov 29, 2014 at 6:29 PM
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SATURNTECH9
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Sounds like you could a vacuum leak somewhere have you looked for a vacuum leak yet?
Nov 30, 2014 at 1:30 PM
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CURTISSM
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Not yet. Where would i look to try to locate that issue? Or confirm or deny thatissue?
Dec 1, 2014 at 3:53 AM
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SATURNTECH9
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Iam not real familiar with these astras i worked for saturn a very long time.The astra replaced the ion but we sold very few of these cars and if you look on the road you don't see many.So where a common vacuum leak area might be i have no clue.But like any vacuum you check the intake manifold area and vacuum lines etc for leaks.The best way to find a vacuum leak is to perform a smoke test.Where smoke is injected into the vacuum system and you watch for smoke to escape. Smoke machines are expensive to buy about 700.To have one done its about 100.You also get some carb spray and spray all around at idle and see if the idle goes up or down or the engine stumbles or dies?
Dec 1, 2014 at 3:20 PM
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CURTISSM
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So i checked again and the whistling isnt coming from the engine block its actually underneath the chassis. So im mot really sure whats going on now
Dec 1, 2014 at 3:49 PM
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SATURNTECH9
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You could try popping the serpentine drive off and and start it and see if the noise is gone? Don't run it long with belt off.
Dec 2, 2014 at 6:11 AM