Diagnosis And Testing: Lubrication
WARNING: This page is about a different variant/trim than selected.
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| OIL LEAKS | 1. Misaligned or damaged gaskets and O-rings. | 1. Replace as necessary. |
| 2. Loose fasteners, broken or porous metal parts. | 2. Tighten fasteners, Repair or replace metal parts. | |
| 3. Crankshaft rear oil seal. | 3. Replace as necessary. | |
| 4. Crankshaft seal flange. Scratched, nicked or grooved. | 4. Polish or replace crankshaft. | |
| 5. Oil pan flange cracked. | 5. Replace the oil pan. | |
| 6. Front crankshaft oil seal, damaged or misaligned. | 6. Replace the front crankshaft oil seal. | |
| 7. Scratched or damaged vibration damper hub. | 7. Polish or replace the vibration damper. | |
| 8. Crankshaft Rear Flange Microporosity. | 8. Replace the crankshaft. | |
| OIL PRESSURE DROP | 1. Low oil level. | 1. Check and correct oil level. |
| 2. Faulty oil pressure switch. | 2. Replace the oil pressure switch. | |
| 3. Low oil pressure. | 3. Check the oil pump and bearing clearance. | |
| 4. Clogged oil filter. | 4. Replace the oil filter. | |
| 5. Worn oil pump. | 5. Replace the oil pump. | |
| 6. Thin or diluted oil. | 6. Change the oil and filter. | |
| 7. Excessive bearing clearance. | 7. Replace bearings as necessary. | |
| 8. Oil pump relief valve stuck. | 8. Replace the oil pump. | |
| 9. Oil pickup tube/seal loose or damaged. | 9. Replace the oil pickup tube. | |
| OIL PUMPING AT RINGS; SPARK PLUGS FOULING | 1. Worn or damaged rings. | 1. Hone the cylinder bores and replace rings. |
| 2. Carbon in oil ring slots. | 2. Replace the rings. | |
| 3. Incorrect ring size installed. | 3. Replace the rings. | |
| 4. Worn valve guides. | 4. Ream the guides and replace valves. | |
| 5. Leaking valve guide seals. | 5. Replace the valve guide seals. |