Defective Turbocharger - Detroit Diesel MBE 4000 DDEC VI Troubleshooting Manual

7.3

DEFECTIVE TURBOCHARGER

To determine if a defective turbocharger is causing excessive crankcase pressure, perform the
following:
Ensure that the engine is not allowed to operate longer than
necessary to perform the crankcase pressure test. A complete
loss of crankcase oil will severely damage the engine.
1. Remove the turbocharger drain line connected to the crankcase and place the drain line
into a suitable container; refer to the MBE 4000 Service Manual (6SE420, Air Intake
System Chapter for turbocharger removal.
2. Perform a crankcase pressure test; refer to section 7.1.1
[a] If the engine crankcase pressure is less than 2.0 kPa (8.0 in. H
turbocharger; refer to the MBE 4000 Service Manual (6SE420, Air Intake System
Chapter for turbocharger removal. Shut down the engine.
[b] If the engine crankcase pressure indicates no change, check for a worn or damaged
valve or cylinder kit;
7.3.1 Turbocharger Replacement
Perform the following steps to replace a defective turbocharger:
1. Remove the defective turbocharger from the engine; refer to the MBE 4000 Service
Manual (6SE420, Air Intake System Chapter for turbocharger removal.
2. Tag the removed turbocharger for remanufacture.
3. Install a replacement turbocharger to the engine; refer to the MBE 4000 Service Manual
(6SE420, Air Intake System Chapter for turbocharger installation.
4. Verify replacement of new turbocharger; refer to section 7.3.1.1
7.3.1.1 Test Engine with New Turbocharger
To determine if a new turbocharger resolved the excessive crankcase pressure, perform a
crankcase pressure test;refer to section 7.1.1
1. If the engine crankcase pressure is 2.0 kPa (8.0 in. H
is required. Shut down the engine.
2. If the engine crankcase pressure is greater than 2.0 kPa (8.0 in. H
engine. Check for a worn or damaged valve or cylinder kit; refer to section 7.4
All information subject to change without notice.
6SE568 Copyright © PRELIMINARY 2007 DETROIT DIESEL CORPORATION
NOTICE:
(Rev. )
MBE 4000 DDEC VI TROUBLESHOOTING GUIDE
O), replace the
2
O) or less, no further troubleshooting
2
O), shut down the
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