ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – Lubricating Oil Contaminated

Symptom Tree  t103

This is symptom tree t103
Cause Correction

Identify lubricating oil contamination

Perform an oil analysis to determine the contaminants.


Fuel in the lubricating oil

Refer to the Fuel in the Lubricating Oil symptom tree.


Internal coolant leaks

Refer to the Coolant Loss – Internal symptom tree.


Bulk oil supply is contaminated

Check the bulk oil supply. Drain the oil and replace with noncontaminated oil. Replace the oil filters. Refer to Procedures 007-013 and 007-037.

Last Modified:  29-Jul-2005