Subaru Legacy (2005 year). Service manual — part 305
LU(H4DOTC)-19
LUBRICATION
Engine Oil Cooler
8. Engine Oil Cooler
A: REMOVAL
1) Lift-up the vehicle.
2) Remove the under cover.
3) Drain engine oil.
4) Drain coolant.
5) Remove the water by-pass pipe between oil
cooler and water pump.
6) Remove the engine oil filter. <Ref. to
LU(H4DOTC)-18, REMOVAL, Engine Oil Filter.>
7) Remove the oil cooler connector and remove oil
cooler.
B: INSTALLATION
Install in the reverse order of removal.
NOTE:
Use new O-rings.
Tightening torque:
T: 54 N
⋅
m (5.5 kgf-m, 40 ft-lb)
C: INSPECTION
1) Check that coolant passages are not clogged by
blowing compressed air.
2) Check the mating surfaces of cylinder block, O-
ring groove and oil filter for damage.
(A) O-ring
(B) Oil cooler
(C) Oil cooler connector
LU-00040
LU-00225
(C)
(B)
(A)
(A) O-ring
(B) Oil cooler
(C) Oil cooler connector
LU-00226
(C)
(B)
(A)
T
LU(H4DOTC)-20
LUBRICATION
Engine Lubrication System Trouble in General
9. 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 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 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 at terminals
Repair.
2) Defective wiring harness
Repair.
3) Low oil pressure
Check for the same
possible causes as
listed in 1) —2).
SPEED CONTROL SYSTEMS
SP(H4DOTC)
Page
General Description . . . . . . . . . . . . . . . . . . . . . 2
SP(H4DOTC)-2
Vehicle-id:
SIE-id:S147001a22:A:SPECIFICATION
∼
SPEED CONTROL SYSTEMS
General Description
1. General Description
A: SPECIFICATION
Specifications for Turbo model is included in
SP(H4SO 2.0) section. <Ref. to SP(H4SO 2.0)-2,
General Description.>
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