Oil Contains Coolant
- Water pump
- Engine oil cooler core
- Water-cooled turbocharger
- Cylinder head gasket
- Cylinder head
- Cylinder liner
- Cylinder block
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| Troubleshooting Test Steps | Values | Results |
1. Water pump A. Check the weep hole in the water pump for blockage. B. Check the water pump seals. |
Water pump |
Result : The water pump is leaking. Repair : Replace the water pump. Refer to the Disassembly and Assembly manual for more information. Result : The water pump is not leaking. Proceed to Test Step 2. |
2. Check for leaks in the oil cooler core. |
Oil cooler core |
Result: No leak is found in the oil cooler core. Proceed to Test Step 3. Result: There is a leak found in the oil cooler core. Repair : Replace the oil cooler core. |
3. If the engine is equipped with a water-cooled turbocharger, inspect the turbocharger for cracks. |
Turbocharger |
Result: The turbocharger is not cracked. Proceed to Test Step 4. Result: The turbocharger is cracked. Repair : Replace the turbocharger. Refer to the Disassembly and Assembly Manual for more information. |
4. Check the cylinder liner projection. |
Liner projection |
Result: Cylinder liner projection is OK. Proceed to Test Step 5. Result: Cylinder liner projection is NOT OK. Repair : Install a new cylinder head gasket and new water seals in the spacer plate. Refer to the Disassembly and Assembly manual. |
5. Check for cracks in the cylinder head. |
Cracks in cylinder head |
Result: There are no cracks in the cylinder head. Proceed to Test Step 6. Result: There are cracks in the cylinder head. Repair : Repair the cylinder head and/or replace the cylinder head. Refer to the Disassembly and Assembly manual. |
6. Check for cracked cylinder liners. |
Cracks in cylinder liners |
Result: There are no cracks in the cylinder liners. Proceed to Test Step 7. Result: There are cracks in the cylinder liners. Repair : Replace any cracked cylinder liners. Refer to the Disassembly and Assembly manual. |
7. Inspect the cylinder block for cracks. |
Cracks in cylinder block. |
Result: The cylinder block is not cracked. STOP Result: The cylinder block is cracked. Repair : Repair the cylinder block or replace the cylinder block. STOP |
Caterpillar Information System:
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