M11 Series – Service Manual – Fuel in Coolant

Symptom Tree  t091

This is symptom tree t091
Cause Correction

Bulk coolant supply is contaminated

Check the bulk coolant supply. Drain the coolant and replace with noncontaminated coolant. Replace the coolant filters. Refer to Cummins Coolant Requirements and Maintenance, Bulletin 3666132.

 

Fuel heater is malfunctioning (if equipped)

Check the fuel heater and replace, if necessary. Refer to the manufacturer’s instructions.

 

Cylinder head is cracked or porous, or an injector sleeve is leaking

Pressure-test the cylinder head and inspect the injector sleeves. Refer to Procedure 002-004.

 
Last Modified:  14-Jan-2004