Subaru Legacy III (2000-2003 year). Service manual — part 86
LU(H4SO)-18
LUBRICATION
ENGINE OIL FILTER
7. Engine Oil Filter
A: REMOVAL
1) Remove under cover. <Ref. to EI-13, REMOV-
AL, Front Under Cover.>
2) Remove oil filter with ST.
ST
498547000
OIL FILTER WRENCH
B: INSTALLATION
1) Get a new oil filter and thinly apply engine oil to
the seal rubber.
2) Install oil filter by turning it by hand, being careful
not to damage seal rubber.
3) Tighten more (approximately 2/3 to 3/4 turn) af-
ter the seal rubber contacts the cylinder block. Do
not tighten excessively, or oil may leak.
C: INSPECTION
1) After installing oil filter, run engine and make
sure that no oil is leaking around seal rubber.
NOTE:
The filter element and filter case are integrated
therefore, interior cleaning is not necessary.
2) Check the engine oil level. <Ref. to LU(H4SO)-8,
INSPECTION, Engine Oil.>
LU-00100
LU(H4SO)-19
LUBRICATION
ENGINE LUBRICATION SYSTEM TROUBLE IN GENERAL
8. Engine Lubrication System Trouble in General
A: INSPECTION
Before performing diagnostics, make sure that the engine oil level is correct and no oil leakage exists.
Trouble
Possible cause
Corrective action
1. Warning light remains
on.
1) Oil pressure switch
failure
Cracked diaphragm or oil leakage within switch Replace.
Broken spring or seized contacts
Replace.
2) Low oil pressure
Clogged oil filter
Replace.
Malfunction of oil by-pass valve of oil filter
Clean or replace.
Malfunction of oil relief valve of oil pump
Clean or replace.
Clogged oil passage
Clean.
Excessive tip clearance and side clearance of
oil pump rotor and gear
Replace.
Clogged oil strainer or broken pipe
Clean or replace.
3) No oil pressure
Insufficient engine oil
Replenish.
Broken pipe of oil strainer
Replace.
Stuck oil pump rotor
Replace.
2. Warning light does
not go on.
1) Burn-out bulb
Replace.
2) Poor contact of switch contact points
Replace.
3) Disconnection of wiring
Repair.
3. Warning light flickers
momentarily.
1) Poor contact at terminals
Repair.
2) Defective wiring harness
Repair.
3) Low oil pressure
Check for the same possible
causes as listed in 1.—2).
LU(H4SO)-20
LUBRICATION
ENGINE LUBRICATION SYSTEM TROUBLE IN GENERAL
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