Oil Contains Coolant
- Engine oil cooler
- Cylinder head gasket
- Cylinder head
- Cylinder block
- Drain the engine lubricating oil from the engine.
- Check for internal leaks in the oil cooler assembly. Refer to Systems Operation, Testing, and Adjusting, "Cooling System" for the correct procedure. If a leak is found, install a new oil cooler. Refer to Disassembly and Assembly, "Engine Oil Cooler - Remove" and Disassembly and Assembly, "Engine Oil Cooler - Install" for the correct procedure.
- Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove" for the correct procedure.
- Inspect the cylinder head gasket for faults and any signs of leakage.
- Proceed to the recommended actions for "Cylinder Head".
- Check the cylinder head for flatness. Refer to Systems Operation, Testing, and Adjusting, "Cylinder Head - Inspect" for the correct procedure.
- Check the mating face of the cylinder head for faults and signs of leakage. If a fault is found, replace the cylinder head. If signs of leakage are found, determine the cause of the leakage. Refer to Systems Operation, Testing, and Adjusting, "Cylinder Head - Inspect" for the correct procedure.
- Check the internal core plugs in the cylinder head for signs of leakage.
- Proceed to "Cylinder Block".
Inspect the top face of the cylinder block for faults and signs of leakage. If a fault is found, replace the cylinder block. If signs of leakage are found, determine the cause of the leakage. Refer to Systems Operation, Testing, and Adjusting, "Cylinder Block - Inspect" for the correct procedure.
- Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".
- Remove the oil filter element. Install a new engine oil filter element. Fill the engine with clean engine oil to the correct level. Refer to the Operation and Maintenance Manual, "Engine Oil and Filter - Change" for more information.
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