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