ROD 1535593 - Caterpillar

Probable Causes
Water pump
Engine oil cooler
Cylinder head gasket
Cylinder head
Cylinder liner
Cylinder blockNote: Verify the presence of oil in the coolant with a scheduled oil sample. Verification must be made before performing the procedure.Recommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Inspect the Water Pump
A. Check for leaks around the seal of the water pump.
B. Inspect the following for damage:
- Seal
- Impeller shaft
- Impeller shaft bearings
Leaks or Damage
Result: The water pump is OK.
Proceed to Test Step 2.
Result: The water pump is NOT OK.
Repair: Perform the following:
1. Repair or replace the damaged components. Refer to the Disassembly and Assembly manual for additional information.
2. Flush the cooling system. Refer to the Operation and Maintenance Manual for additional information.
3. Refill the cooling system with the proper coolant. Refer to the Operation and Maintenance Manual for the correct coolant and capacities.
4. Check the oil for coolant. If coolant is found in the oil, drain the crankcase.
5. Refill the crankcase with the proper oil after the leak has been repaired. Install new engine oil filters. Refer to the Operation and Maintenance Manual for the correct oil capacities and viscosity.
If the problem is