ENGINE LUBRICATION DIAGNOSTIC TABLE

OIL LEAKS

1. Gaskets and O-rings. Misaligned or damaged.

1. Replace as necessary.

(a) Loose fasteners, broken or porous metal parts.

(a) Tighten fasteners, Repair or replace metal parts.

2. Crankshaft rear oil seal.

2. Replace rear crankshaft oil seal (Refer to 09 - Engine/Engine Block/SEAL, Crankshaft Oil - Removal) .

3. Crankshaft seal flange. Scratched, nicked or grooved.

3. Polish or replace crankshaft.

4. Oil pan flange cracked.

4. Replace oil pan (Refer to 09 - Engine/Lubrication/PAN, Oil - Removal) .

5. Engine timing cover seal, damaged or misaligned.

5. Replace seal (Refer to 09 - Engine/Engine Block/SEAL, Crankshaft Oil - Removal) .

6. Scratched or damaged vibration damper hub.

6. Polish or replace damper.

OIL PRESSURE DROP

1. Low oil level.

1. Check and correct oil level.

2. Faulty oil pressure sensor.

2. Replace sensor (Refer to 09 - Engine/Lubrication/SENSOR, Oil Pressure - Removal) .

3. Low oil pressure.

3. Check main bearing clearance (Refer to 09 - Engine/Engine Block/BEARING(S) , Crankshaft - Standard Procedure).

3. Check rod bearing clearance (Refer to 09 - Engine/Engine Block/BEARING(S) , Connecting Rod - Standard Procedure).

4. Clogged oil filter.

4. Replace oil filter (Refer to 09 - Engine/Lubrication/FILTER, Engine Oil - Removal) .

5. Worn oil pump.

5. Replace oil pump (Refer to 09 - Engine/Lubrication/PUMP, Engine Oil - Removal) .

6. Thin or diluted oil.

6. Change oil and filter (Refer to 09 - Engine/Lubrication/OIL - Standard Procedure) .

7. Excessive bearing clearance.

7. Replace crankshaft bearings (Refer to 09 - Engine/Engine Block/BEARING(S) , Crankshaft - Standard Procedure).

7. Replace rod bearings (Refer to 09 - Engine/Engine Block/BEARING(S) , Connecting Rod - Standard Procedure).

8. Oil pump relief valve stuck.

8. Replace oil pump (Refer to 09 - Engine/Lubrication/PUMP, Engine Oil - Removal) .

9. Oil pump pick-up tube loose, damaged or clogged.

9. Replace oil pump pick-up (Refer to 09 - Engine/Lubrication/PICK-UP, Oil Pump - Removal) .

OIL PUMPING AT RINGS; SPARK PLUGS FOULING

1. Worn or damaged rings.

1. Hone cylinder bores and replace rings (Refer to 09 - Engine/Engine Block/RING(S) , Piston - Standard Procedure).

2. Carbon in oil ring slots.

2. Replace rings (Refer to 09 - Engine/Engine Block/ROD, Piston and Connecting - Removal) .

3. Worn valve guides.

3. Replace cylinder heads (Refer to 09 - Engine/Cylinder Head - Removal) .

4. Leaking valve guide seals.

4. Replace valve guide seals (Refer to 09 - Engine/Cylinder Head/SEAL(S) , Valve Guide - Removal).