Subaru Legacy (2005 year). Service manual — part 418
LU(H6DO)-15
LUBRICATION
Engine Oil Cooler
9. Engine Oil Cooler
A: REMOVAL
1) Lift-up the vehicle.
2) Remove the under cover.
3) Drain the engine coolant.
<Ref. to CO(H6DO)-11, DRAINING OF ENGINE
COOLANT, REPLACEMENT, Engine Coolant.>
4) Drain the engine oil. <Ref. to LU(H6DO)-7, RE-
PLACEMENT, Engine Oil.>
5) Remove the bolts which hold water pipe to en-
gine.
6) Disconnect the water hose from oil cooler.
7) Remove the oil filter using ST. <Ref. to
LU(H6DO)-14, REMOVAL, Engine Oil Filter.>
ST
498547000
OIL FILTER WRENCH
NOTE:
Set a container under the vehicle.
8) Remove the oil cooler connector and remove oil
cooler.
B: INSTALLATION
1) Install the oil cooler to oil pan upper with oil cool-
er connector.
Tightening torque:
T: 54 N
⋅
m (5.5 kgf-m, 40 ft-lb)
NOTE:
Use a new O-ring.
2) Install the oil filter. <Ref. to LU(H6DO)-14, IN-
STALLATION, Engine Oil Filter.>
LU-02036
LU-02037
LU-00134
(A) Oil cooler connector
(B) Oil cooler
(C) O-ring
(A) Oil cooler connector
(B) Oil cooler
(C) O-ring
(A)
(B)
(C)
LU-02130
(A)
(B)
(C)
T
LU-02131
LU-00134
LU(H6DO)-16
LUBRICATION
Engine Oil Cooler
3) Connect the water hose.
4) Install the water pipe onto engine.
Tightening torque:
6.4 N
⋅
m (0.65 kgf-m, 4.7 ft-lb)
5) Fill engine oil. <Ref. to LU(H6DO)-7, REPLACE-
MENT, Engine Oil.>
6) Fill engine coolant. <Ref. to CO(H6DO)-11,
FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
7) Check the engine oil level. <Ref. to LU(H6DO)-
7, INSPECTION, Engine Oil.>
C: INSPECTION
1) Check that the coolant passages are not
clogged using compressed air.
2) Check the O-ring installing surfaces of oil pan
upper and oil filter for damage.
LU-02037
LU-02036
LU(H6DO)-17
LUBRICATION
Engine Lubrication System Trouble in General
10.Engine Lubrication System Trouble in General
A: INSPECTION
Before performing diagnosis, make sure that the engine oil level is correct and no oil leakage exists.
Symptom
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
Clogging of oil filter
Replace.
Malfunction of oil by-pass valve in oil filter
Clean or replace.
Malfunction of oil relief valve in oil pump
Clean or replace.
Clogged oil passage
Clean.
Excessive tip clearance and side clearance
between oil pump rotor and gear
Replace.
Clogged oil strainer or broken pipe
Clean or replace.
3) No oil pressure
Insufficient engine oil amount
Replenish.
Broken pipe of oil strainer
Replace.
Stuck oil pump rotor
Replace.
2. Warning light does
not come on.
1) Malfunction of combination meter
Replace.
2) Poor contact in 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(H6DO)-18
LUBRICATION
Engine Lubrication System Trouble in General
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