Detroit Diesel 4000 Series, Service Manual, Page: 2662 / 2706

SERIES 4000 12/16V SERVICE MANUAL
E 012.05 T – ENGINE OIL CONSUMPTION ABNORMALLY HIGH
Start with the first probable cause for engine oil consumption abnormally high listed in Table 19,
perform the check and take the suggested remedial action. If the problem persists, go to the next
probable cause, perform the check, etc., until troubleshooting is complete.
Probable Causes Check Remedial Action
Cylinder block ventilation faulty Cylinder block ventilation Replace
Engine oil system leaking
externally External subassemblies Seal pipework
External pipework Check connections; tighten if necessary
Engine oil drains Seal
Shaft seals Replace
Oil pan Seal pipework
Cylinder block Repair
Engine oil system leaking
internally Coolant quality
Oil line connection to engine
oil heat exchanger Replace sealing rings
Exhaust turbocharger leaking Exhaust turbocharger Replace bearings
Engine wear Valve stem seal Replace
Piston rings Replace
Valve guides Replace
Cylinder liners Replace
Table 19 Engine Oil Consumption Abnormally High
All information subject to change without notice.
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