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Cause
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Correction
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Note
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Some whine noise is normal. Compare to a known good vehicle.
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Leaking charge air cooler/pipes/hoses
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Inspect for leaks in charge air cooler/pipes/hoses
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Worn turbocharger bearings
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Visually inspect for evidence of compressor wheel to housing contact.
If the turbocharger bearings are worn or damaged, inspect for a
Turbocharger Lack of Oil Supply
.
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Intake system leaks or obstructions
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1.
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With the engine off, pressurize the intake system and inspect for intake manifold leaks.
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2.
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Inspect for obstructions in the intake manifolds.
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