Car is whistling when I start up Real Loud sound. Also where can I get a diagram of my engine?

1999 PONTIAC GRAND AM
175,000 MILES
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ASHEPHERD
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Whistling Sound. Diagram of engine
Jan 6, 2012 at 5:17 AM
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SATURNTECH9
  • ✓ASE Certified Mechanic
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So is the whistling only at idle?Does it sound like a tea kettle?
Jan 6, 2012 at 5:59 AM
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