Symptom Troubleshooting Index
SYMPTOM TROUBLESHOOTING INDEX
| Symptom |
Diagnostic Procedure |
| Excessive engine oil consumption |
- Check for worn valve guide(s) (see VALVE STEM-TO-GUIDE CLEARANCE INSPECTION
) or worn valve stem seal(s).
- Check for damaged or worn piston ring(s).
- Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) (see BLOCK & PISTON INSPECTION
).
- Check for oil leaks.
- Check the operation of the positive crankcase ventilation (PCV) system (see PCV VALVE INSPECTION
).
- Check the engine oil for dirt or improper viscosity.
|
| Low engine oil pressure |
- Check the oil screen for clogging.
- Test the oil pump (see OIL PUMP OVERHAUL
).
- Check the relief valve.
- Test the oil pressure switch.
- Check for excessive clearance in the engine (bearing-to-journal, etc.).
- Check the engine oil for dirt or improper viscosity.
|
| High engine oil pressure |
Check the relief valve. |