Subaru Legacy (2005 year). 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.