ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – Lubricating or Transmission Oil in the Coolant

Symptom Tree  t108

This is symptom tree t108
Cause Correction

Bulk coolant supply is contaminated

Check the bulk coolant supply. Drain the coolant and replace with non-contaminated coolant. Replace the coolant filters. Refer to Procedure 008-018 and Procedure 008-006 in Section 8.

 

Lubricating oil cooler is malfunctioning

Check the oil cooler. Refer to Procedure 007-003 in Section 7.

 

Torque converter cooler or hydraulic oil cooler is malfunctioning

Remove and inspect the cooler cores and o-rings. Refer to the OEM service manual.

 

Marine gear oil cooler is malfunctioning

Remove and inspect the marine gear oil cooler. Refer to Procedure 008-041 or Procedure 008-129 in Section 8.

 

Turbocharger bearing housing cracked or porous

Remove the turbocharger and pressure test for a cracked or porous bearing housing. Refer to Procedure 010-033 in Section 10.

 

Cylinder head gasket is leaking

Remove the cylinder head and check the cylinder head gasket. Refer to Procedure 002-004 in Section 2.

 

Cylinder head is cracked or porous

Pressure test the cylinder head. Refer to Procedure 002-004 in Section 2.

 

Cylinder block is cracked or porous

Replace the cylinder block. Refer to Procedure 001-026 in Section 1.

 
Last Modified:  06-Aug-2010