Dodge dakota 2002 Service Manual page 1607

9 - 358 ENGINE 8.0L
ENGINE 8.0L (Continued)
DIAGNOSIS AND TESTING—ENGINE DIAGNOSIS - LUBRICATION
CONDITION
OIL LEAKS
OIL PRESSURE DROP
OIL PUMPING AT RINGS; SPARK
PLUGS FOULING
POSSIBLE CAUSES
1. Gaskets and O-Rings.
(a) Misaligned or damaged.
(b) Loose fasteners, broken or
porous metal parts.
2. Crankshaft rear seal
3. Crankshaft seal flange.
Scratched, nicked or grooved.
4. Oil pan flange cracked.
5.Front cover seal, damaged or
misaligned.
6. Scratched or damaged vibration
damper hub.
1. Low oil level.
2. Faulty oil pressure sending unit.
3. Low oil pressure.
4. Clogged oil filter.
5. Worn oil pump.
6. Thin or diluted oil.
7. Excessive bearing clearance.
8. Oil pump relief valve stuck.
9. Oil pickup tube loose or
damaged.
1. Worn or damaged rings.
2. Carbon in oil ring slots.
3. Incorrect ring size installed.
4. Worn valve guides.
5. Leaking intake gasket.
6. Leaking valve guide seals.
CORRECTION
1.
(a) Replace as necessary.
(b) Tighten fasteners, Repair or
replace metal parts.
2. Replace as necessary.
3. Polish or replace crankshaft.
4. Replace oil pan.
5. Replace seal.
6. Polish or replace damper.
1. Check and correct oil level.
2. Replace sending unit.
3. Check pump and bearing
clearance.
4. Replace oil filter.
5. Replace as necessary.
6. Change oil and filter.
7. Replace as necessary.
8. Replace oil pump.
9. Replace as necessary.
1. Hone cylinder bores and replace
rings.
2. Replace rings.
3. Replace rings.
4. Ream guides and replace valves.
5. Replace intake gaskets.
6. Replace valve guide seals.
DR