Subaru Legacy IV (2008 year). Service manual — part 504
LU(H6DO)-17
Oil Cooler
LUBRICATION
9. Oil Cooler
A: REMOVAL
CAUTION:
If the engine oil is spilt over exhaust pipe or the
under cover, wipe it off with cloth to avoid emit-
ting smoke or causing a fire.
1) Set the vehicle on a lift.
2) Lift up the vehicle.
3) Remove the under cover.
4) Drain engine coolant. <Ref. to CO(H6DO)-10,
DRAINING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
5) Drain the engine oil. <Ref. to LU(H6DO)-8, RE-
PLACEMENT, Engine Oil.>
6) Remove the bolts which hold the engine oil cool-
er water pipe to engine.
7) Disconnect the water hose from oil cooler.
8) Remove the oil filter using the ST. <Ref. to
LU(H6DO)-16, REMOVAL, Engine Oil Filter.>
9) Remove the oil cooler connector and remove the
oil cooler.
LU-02128
LU-02129
(A) Oil cooler connector
(B) Oil cooler
(C) Gasket
LU-02130
(A)
(B)
(C)
LU(H6DO)-18
Oil Cooler
LUBRICATION
B: INSTALLATION
1) Install the oil cooler to oil pan upper with oil cool-
er connector.
NOTE:
Use a new gasket.
Tightening torque:
T: 54 N·m (5.5 kgf-m, 39.8 ft-lb)
2) Install the oil filter. <Ref. to LU(H6DO)-16, IN-
STALLATION, Engine Oil Filter.>
3) Connect the water hose.
4) Install the engine oil cooler water pipe onto en-
gine.
Tightening torque:
6.4 N·m (0.7 kgf-m, 4.7 ft-lb)
5) Lower the vehicle.
6) Refill the engine oil. <Ref. to LU(H6DO)-8, RE-
PLACEMENT, Engine Oil.>
7) Fill engine coolant. <Ref. to CO(H6DO)-10,
FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
8) Check the engine oil level. <Ref. to LU(H6DO)-
8, INSPECTION, Engine Oil.>
C: INSPECTION
1) Check that coolant passages are not clogged
using an compressed air.
2) Check that the oil pan upper and O-ring installing
surface of oil filter are not damaged.
(A) Oil cooler connector
(B) Oil cooler
(C) Gasket
LU-02131
(A)
(B)
(C)
T
LU-02129
LU-02128
LU(H6DO)-19
Engine Lubrication System Trouble in General
LUBRICATION
10.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.
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 of oil
pump rotor and gear
Replace.
Clogged oil strainer or broken pipe
Clean or replace.
3) No oil pressure
Insufficient engine oil (including deterioration)
Replace.
Broken pipe of oil strainer
Replace.
Stuck oil pump rotor
Replace.
2. Warning light does
not turn on.
1) Malfunction of combination meter
Replace.
2) Poor contact of switch contact points
Replace.
3) Disconnection of wiring
Repair.
3. Warning light flickers
momentarily.
1) Poor contact of terminals
Repair.
2) Defective wiring harness
Repair.
3) Low oil pressure
Check for the same
possible causes as
listed 1. — 2).
LU(H6DO)-20
Engine Lubrication System Trouble in General
LUBRICATION
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