Lubricating Oil Consumption Excessive
|
Symptom |
Possible Cause |
Action |
Reference |
|
Lubricating Oil Consumption Excessive |
Verify the oil consumption rate |
Check the amount of oil added versus the mileage. |
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|
Lubricating oil leak (external) |
Inspect the engine for external oil leaks. Tighten bolts and fittings. Replace gaskets, if necessary. |
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Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. |
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Lubricating oil does not meet specifications for operating conditions. |
Change the oil and oil filter. Also see lubricating oil recommendations and specifications. |
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Lubricating oil drain interval is excessive |
Verify the correct lubricating oil drain interval. Refer to the maintenance schedule. |
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Oil cooler is leaking |
Check the oil cooler for coolant leaks. Refer to Coolant Loss - Internal symptom diagnosis. |
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Lubricating oil level is above specification |
Check the oil level. Fill the system to the specified level. |
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Engine angularity during operation excessive |
Operate the vehicle on a level surface and re-check. |
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Turbocharger oil seal is leaking |
Check the turbocharger compressor and turbine seals for signs of an oil leak. |
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Lubricating oil is contaminated with coolant or fuel |
Refer to the Lubricating Oil Contaminated symptom diagnosis. |
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Valve stem clearance is excessive or the valve stem seals are damaged |
Check the valve stems and seals. |
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Piston rings are not seated correctly (after an engine rebuild or piston installation, or new engine installation) |
Check for excessive blowby. Refer to Crankcase Gases (Blowby) Excessive symptom diagnosis. |
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Piston rings are worn or damaged |
Check for air intake system leaks. Check the pistons and piston rings for wear or damage. Analyze the oil and inspect the oil filter to locate an area of probable damage. |
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Internal engine damage |
Analyze the oil and inspect the oil filter to locate an area of probable damage. |