Turbocharger whining noise
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STATE
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Operation, action
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Some whining noise is normal. Compare with a known good car.
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Leak in cooler/charge air tubes/hoses
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Inspect for leaks in cooler/charge air tubes/hoses.
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Turbocharger bearing wear
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Inspect the turbocharger bearings. See "Insufficient Oil Supply to Turbocharger" in this section.
If the turbocharger bearings are worn or damaged, repair or replace the turbocharger.
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Leaks or obstructions in the intake system
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Inspect for leaks or obstructions in the intake manifold.
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Turbocharger whistling noise
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STATE
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Operation, action
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Leaks or obstructions in the air intake
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Inspect for leaks or obstructions in turbocharger inlet pipes/hoses.
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Leak in cooler/charge air tubes/hoses
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Inspect for leaks or obstructions in cooler/charge air tubes/hoses.
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Leaks or obstructions in the exhaust system
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Leaks or obstructions in the intake system
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Turbocharger oil leak from compressor seal
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STATE
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Operation, action
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Important: Oil leakage into the turbocharger air intake duct, turbocharger impeller, and charge air cooler system is normal when the positive crankcase ventilation (PCV) system is closed. Do not attempt to correct this. |
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Obstruction in the air system
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Inspect for a clogged air filter insert or obstruction in the air intake system.
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Obstruction in the exhaust system
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Inspect for obstructions in the outlet.
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Leaks in the exhaust system.
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Inspect for leaks in the exhaust manifold.
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Insufficient oil drainage from turbocharger
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Inspect the turbocharger oil drain tube for obstruction.
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Obstruction in the crankcase ventilation system
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Inspect the crankcase ventilation system for obstructions.
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Wear of internal engine components
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Inspect for excessive blow-by or engine oil consumption.
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Turbocharger oil leak from turbine seal
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STATE
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Operation, action
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Insufficient oil drainage from turbocharger
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Inspect the turbocharger oil drain tube for obstruction.
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Obstruction in the crankcase ventilation system
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Inspect the crankcase ventilation system for obstructions.
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Wear of internal engine components
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Inspect for excessive blow-by or engine oil consumption.
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Insufficient oil supply to the turbocharger
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STATE
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Operation, action
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Obstruction in the oil supply line
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Inspect the turbocharger oil supply line for obstruction.
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Oil leak in the oil supply line
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Inspect the turbocharger oil supply line
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