ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – Lubricating Oil Temperature Above Specification

Symptom Tree  t107

This is symptom tree t107
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in Troubleshooting and Repair Manual, ISB, QSB4.5, QSB5.9, QSB6.7, ISC, QSC8.3, ISL and QSL9 Engines, CM850 Electronic Control System, Bulletin 4021416 or Troubleshooting and Repair Manual, Electronic Control System, ISC, QSC8.3 and ISL Engines, Bulletin 3666271.


Coolant temperature is above specification

Refer to the Coolant Temperature Above Normal symptom tree.


Lubricating oil level is above or below specification

Check the oil level. Add or drain oil, if necessary. Refer to Procedure 007-037.


Lubricating oil temperature switch, gauge, or sensor malfunctioning or not in the correct location

Check the oil temperature switch, gauge, or sensor for correct operation and location. Refer to the OEM service manual.


OEM components cooled with engine lubricating oil are malfunctioning

Check OEM components. Refer to the OEM service manual.


Lubricating oil cooler is plugged

Check the oil cooler. Refer to Procedure 007-003.


Internal engine damage

Analyze the oil and inspect the filters to locate an area of probable damage. Refer to Procedure 007-083.

Last Modified:  20-Jun-2005