Subaru Legacy (2005 year). Service manual — part 88
CO(H4SO 2.0)-27
COOLING
Radiator Sub Fan and Fan Motor
9. Radiator Sub Fan and Fan
Motor
A: REMOVAL
1) Set the vehicle on a lift.
2) Disconnect the ground cable from battery.
3) Lift-up the vehicle.
4) Remove the under cover.
5) Disconnect the connector (B) of sub fan motor.
6) Remove the heat shield cover. (Model without
ATF warmer)
7) Remove the ATF hose from the clip of radiator
sub fan motor assembly. (Model without ATF
warmer)
8) Lower the vehicle.
9) Remove the air intake duct. <Ref. to IN(H4SO
2.0)-8, REMOVAL, Air Intake Duct.>
10) Remove the bolts which hold the radiator sub
fan shroud to radiator.
11) Remove the radiator sub fan motor assembly
from the lower side of vehicle.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
7.5 N
⋅
m (0.76 kgf-m, 5.5 ft-lb)
C: DISASSEMBLY
1) Remove the clip which holds the fan motor con-
nector onto shroud.
2) Remove the nut which holds fan onto the fan
motor and shroud assembly.
IN-00203
CO-00275
(B)
CO-00273
CO-00101
CO-00101
CO-00097
CO(H4SO 2.0)-28
COOLING
Radiator Sub Fan and Fan Motor
3) Remove the bolts which install fan motor onto
the shroud.
D: ASSEMBLY
Assemble in the reverse order of disassembly.
Tightening torque:
5 N
⋅
m (0.5 kgf-m, 3.7 ft-lb)
Tightening torque:
3.4 N
⋅
m (0.35 kgf-m, 2.5 ft-lb)
CO-00098
CO-00098
CO-00097
CO(H4SO 2.0)-29
COOLING
Reservoir Tank
10.Reservoir Tank
A: REMOVAL
1) Disconnect the over flow hose.
2) Pull out the reservoir tank to the direction of ar-
row while pushing the pawl (A).
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
Make sure the engine coolant level is between
“FULL” and “LOW”.
(A)
CO-00279
CO(H4SO 2.0)-30
COOLING
Engine Cooling System Trouble in General
11.Engine Cooling System Trouble in General
A: INSPECTION
Trouble
Possible cause
Corrective action
Overheating
a. Insufficient engine coolant
Replenish engine coolant, inspect for leakage, and
repair it if necessary.
b. Loose timing belt
Repair or replace timing belt tensioner.
c. Oil on timing belt
Replace.
d. Malfunction of thermostat
Replace.
e. Malfunction of water pump
Replace.
f. Clogged engine coolant passage
Clean.
g. Improper ignition timing
Inspect and repair ignition control system.
<Ref. to EN(H4SO 2.0)(diag)-2, Basic Diagnostic Proce-
dure.>
h. Clogged or leaking radiator
Clean, repair or replace.
i. Improper engine oil in engine coolant
Check, repair or replace the parts around engine.
j. Air/fuel mixture ratio too lean
Inspect and repair the fuel injection system. <Ref. to
EN(H4SO 2.0)(diag)-2, Basic Diagnostic Procedure.>
k. Excessive back pressure in exhaust system
Clean or replace.
l. Insufficient clearance between piston and cylinder
Adjust or replace.
m. Slipping clutch
Correct or replace.
n. Dragging brake
Adjust.
o. Defective radiator fan
Inspect radiator fan relay, engine coolant temperature
sensor or fan motor and replace them.
Over-cooling
a. Ambient temperature extremely low
Partly cover radiator front area.
b. Defective thermostat
Replace.
Engine coolant
leaks
a. Loosened or damaged connecting units on hoses
Correct or replace.
b. Leakage from water pump
Replace.
c. Leakage from water pipe
Correct or replace.
d. Leakage around cylinder head gasket
Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crankcase Correct or replace.
f. Damaged or cracked thermostat case
Correct or replace.
g. Leakage from radiator
Correct or replace.
Strange noise
a. Defective timing belt
Replace.
b. Defective radiator fan
Replace.
c. Defective water pump bearing
Replace water pump.
d. Defective water pump mechanical seal
Replace water pump.
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