Symptom Tree t028
Cause | Correction |
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Filter miles or hours is at expected maintenance interval for replacement |
Review the engine’s maintenance records to determine if the crankcase breather filter replacement is at expected interval, based on crankcase blowby. Replace the filter if it is acceptable per the records. |
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Lubricating oil level is above specification |
Check the oil level. Verify the dipstick calibration and oil pan capacity. Fill the system to the specified level. Refer to |
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Crankcase ventilation system is plugged |
Check and clean the crankcase breather and vent tube. Refer to |
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Lubricating oil is contaminated |
Analyze an oil sample for fuel dilution percentage, coolant in oil, and foreign contamination. Repair the source of contamination. |
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Engine Crankcase Gases (Blowby) excessive. |
Refer to Crankcase Gases (Blowby) Excessive troubleshooting symptom tree. |
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