Section 7.5 Defective Turbocharger

Section 7.5
Defective Turbocharger

To determine if a defective turbocharger is causing excessive oil consumption, perform the following:‪

  1. Remove the turbocharger drain line connected to the crankcase and place the drain line into a suitable container.
  2. Perform a crankcase pressure test; refer to "2.1 Crankcase Pressure Test" .
    1. If the engine crankcase pressure is less than 0.62 kPa (2.5 in. H2 O), shut down the engine. Replace the turbocharger; refer to MBE 4000 Service Manual (6SE420), Chapter 6, “Air intake System”. Verify the replacement of the turbocharger, refer to "7.5.1 Test Engine with New Turbocharger" .
    2. If the engine crankcase pressure indicates no change, shut down the engine. Check for worn or damaged valve or cylinder kit. Refer to "7.6 Worn or Damaged Valve or Cylinder Kit" .

Section 7.5.1
Test Engine with New Turbocharger

Perform the following steps to determine if a new turbocharger resolved the excessive crankcase pressure:‪

  1. Remove the turbocharger drain line connected to the crankcase and place the drain line into a suitable container.
  2. Perform a crankcase pressure test. Refer to "2.1 Crankcase Pressure Test" .
    1. If the engine crankcase pressure is greater than 0.62 kPa (2.5 in. H2 O), check for worn or damaged valve or cylinder kit; shut down the engine. Refer to "7.6 Worn or Damaged Valve or Cylinder Kit" .
    2. If the engine crankcase pressure is 0.62 kPa (2.5 in. H2 O) or less, no further troubleshooting is required. Shut down the engine.


EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568
Generated on 10-13-2008

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