Symptom Troubleshooting Index
SYMPTOM TROUBLESHOOTING INDEX
| Symptom |
Diagnostic procedure |
Also check for |
| Excessive engine oil consumption |
- Check for looseness in the engine oil fill cap, oil drain bolt, and oil filter.
- Check for oil leaks.
- Check for worn valve guide(s) (seeVALVE INSPECTION
) or worn valve stem seal(s) (seeVALVE, SPRING, AND VALVE SEAL REMOVAL
).
- Check for damaged or worn piston ring(s) (seePISTON RING REPLACEMENT
).
- Check for damaged or worn engine internal parts (cylinder wall, pistons, etc.) (seeBLOCK AND PISTON INSPECTION
).
|
|
| Low oil pressure indicator does not come on with the ignition switch ON (II) |
- Do the gauge control unit input test (see CONTROL UNIT INPUT TEST
).
- Test the oil pressure switch (see OIL PRESSURE SWITCH TEST
).
|
An open in the wire between the gauge control module and the oil pressure switch |
| Low oil pressure indicator stays on |
- Check the engine oil level.
- Do the gauge control unit input test (see CONTROL UNIT INPUT TEST
).
- Test the oil pressure switch (see OIL PRESSURE SWITCH TEST
).
- Check the engine oil pressure (see OIL PRESSURE TEST
).
- Check the oil filter for clogging.
- Check the oil screen for clogging.
- Check the relief valve (see OIL PUMP OVERHAUL
).
- Test the oil pump (see REMOVAL
).
|
A wire shorted to ground between the gauge control module and the oil pressure switch |