Diagnosis - Lubrication
WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS - LUBRICATION
| CONDITION |
POSSIBLE CAUSE |
CORRECTIONS |
| OIL LEAKS |
- Gaskets and O-Rings.
- Misaligned or damaged.
- Loose fasteners, broken or porous metal parts.
- Crankshaft rear seal
- Crankshaft seal flange. Scratched, nicked or grooved.
- Oil pan flange cracked.
- Timing chain cover seal, damaged or misaligned.
- Scratched or damaged vibration damper hub.
|
-
- Replace as necessary.
- Tighten fasteners, Repair or replace metal parts.
- Replace as necessary (Refer to REMOVAL
)
- Polish or replace crankshaft.
- Replace oil pan (Refer to REMOVAL
)
- Replace seal (Refer to REMOVAL
)
- Polish or replace damper.
|
| OIL PRESSURE DROP |
- Low oil level.
- Faulty oil pressure sending unit.
- Low oil pressure.
- Clogged oil filter.
- Worn oil pump.
- Thin or diluted oil.
- Excessive bearing clearance.
- Oil pump relief valve stuck.
- Oil pick up tube loose, damaged or clogged.
|
- Check and correct oil level.
- Replace sending unit (Refer to REMOVAL
)
- Check oil pump and bearing clearance.
- Replace oil filter (Refer to REMOVAL
)
- Replace oil pump (Refer to REMOVAL
)
- Change oil and filter.
- Replace as necessary.
- Replace oil pump (Refer to REMOVAL
)
- Replace as necessary.
|
| OIL PUMPING AT RINGS; SPARK PLUGS FOULING |
- Worn or damaged rings.
- Carbon in oil ring slots.
- Incorrect ring size installed.
- Worn valve guides.
- Leaking valve guide seals.
|
- Hone cylinder bores and replace rings.
- Replace rings (Refer to STANDARD PROCEDURE - PISTON RING FITTING
)
- Replace rings (Refer to STANDARD PROCEDURE - PISTON RING FITTING
)
- Ream guides and replace valves (Refer to REMOVAL
)
- Replace valve guide seals.
|