PowerTech 6105HF - 10.5 L;12.5 L - C2 - Engine Coolant Temperature below Normal; 10.5 L;12.5 L Engines - C3 - Coolant in Oil or Oil in Coolant

Observable Diagnostics and Tests
OUO1004,0000C4C –19–21DEC00–1/1
10.5L/12.5L - C2 - Engine Coolant Temperature Below Normal
Symptom Problem
Solution
10.5L/12.5L - C2 - Engine Coolant Defective thermostat(s) Test thermostats; replace
Temperature Below Normal thermostats as required. See
REMOVE THERMOSTATS in
Section 02, Group 070.
04
150
8
OUO1004,0000C4B –19–21DEC00–1/1
10.5L/12.5L Engines - C3 - Coolant in Oil or Oil in Coolant
Symptom Problem
Solution
10.5L/12.5L - C3 - Coolant in Oil Faulty cylinder head gasket Look for signs of head gasket failure.
or Oil in Coolant See CHECK FOR HEAD GASKET
FAILURES in this group.
Faulty oil cooler Remove and inspect engine oil
cooler. See REMOVE, CLEAN, AND
INSPECT ENGINE OIL COOLER in
Section 02, Group 060.
Leaking cylinder liner seals Remove and inspect cylinder liners.
See VISUALLY INSPECT
CYLINDER LINERS in Section 02,
Group 030.
Cracked cylinder head or block Locate crack, repair/replace
components as required.
CTM100 (06APR04) 04-150-8 P OWER T ECH 10.5 L & 12.5 L Diesel Engines
040604
PN=356