Bulk coolant supply is contaminated
Check the coolant supply. Drain the coolant and replace with non-contaminated coolant. Refer to Procedure 008-018 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 a-rings. Refer to the OEM service manual.
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.
