TURBOCHARGER INSPECTION [MZ-CD 1.6]

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Inspection and Verification

Note

•  It is normal for a small amount of combustion gas to pass into the crankcase. This gas is scavenged into the air intake system through the positive crankcase ventilation (PCV) system, which incorporates an oil separator. Some engine oil, in the form of a vapor is carried into the air intake system with the blow-by gases (this engine oil also contributes to valve seat durability). This means that oil will collect inside the air intake components and the turbocharger. This is not an indication that the turbocharger oil seal has failed. the turbocharger oil seal will not fail unless the bearings fail first, which will cause the turbocharger to become noisy or seize. Do not install a new turbocharger due to oil inside the turbocharger or the air intake components, locate and rectify the source. Do not install a new turbocharger due to an oil leak.

1.  Verify the customer concern.

2.  Visually inspect for obvious signs of mechanical damage.

Visual inspection chart

3.  If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

4.  If the cause is not visually evident, verify the symptom.