Subaru Legacy (2005 year). Manual - part 82

CO(H4SO 2.0)-3

COOLING

General Description

Vehicle speed

A/C compressor load

Engine coolant temperature

95

°C (203°F) or less

96 — 99

°C

(203 — 210

°F)

100

°C (212°F) or more

Operation of radiator 

fan

Operation of radiator 

fan

Operation of radiator 

fan

19 km/h (12 MPH) or 

less

OFF

OFF

Low-Speed

High-Speed

Low

Low-Speed

Low-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed

20 — 69 km/h

(12 — 43 MPH)

OFF

OFF

Low-Speed

High-Speed

Low

High-Speed

High-Speed

High-Speed

High

High-Speed

High-Speed

High-Speed

70 — 105 km/h

(43 — 65 MPH)

OFF

OFF

Low-Speed

High-Speed

Low

OFF

Low-Speed

High-Speed

High

Low-Speed

High-Speed

High-Speed

106 km/h (66 MPH) or 

more

OFF

OFF

OFF

High-Speed

Low

OFF

Low-Speed

High-Speed

High

OFF

Low-Speed

High-Speed

CO(H4SO 2.0)-4

COOLING

General Description

B: COMPONENT

1. WATER PUMP

(1)

Water pump ASSY

(5)

Thermostat

Tightening torque: N

⋅

m (kgf-m, ft-lb)

(2)

Gasket

(6)

Gasket

T1: First 12 (1.2, 8.9)

Second 12 (1.2, 8.9)

(3)

Heater by-pass hose

(7)

Thermostat cover

(4)

ATF warmer by-pass hose (Model 
with ATF warmer)

T2: 12 (1.2, 8.9)

CO-02031

(7)

(5)

(1)

(6)

(2)

T2

T1

T1

(3)

(4)

CO(H4SO 2.0)-5

COOLING

General Description

2. RADIATOR AND RADIATOR FAN

(1)

Radiator lower cushion

(14)

ATF hose clamp (AT model)

(24)

Radiator cap

(2)

Radiator

(15)

ATF hose A (Model without ATF 
warmer)

(25)

Heat shield cover (Model without 
ATF warmer)

(3)

Radiator upper cushion

(4)

Radiator upper bracket

(16)

ATF hose B (Model without ATF 
warmer)

(26)

ATF hose A (Model with ATF 
warmer)

(5)

Clamp

(6)

Radiator inlet hose

(17)

ATF pipe (Model without ATF 
warmer)

(27)

ATF hose B (Model with ATF 
warmer)

(7)

Engine coolant reservoir tank cap

(8)

Over flow hose

(18)

ATF hose C (Model without ATF 
warmer)

(28)

ATF pipe (Model with ATF warmer)

(9)

Engine coolant reservoir tank

(10)

Radiator sub fan shroud

(19)

ATF hose D (Model without ATF 
warmer)

Tightening torque: N

⋅

m (kgf-m, ft-lb)

(11)

Radiator sub fan, radiator sub fan 
motor ASSY

T1: 5 (0.5, 3.7)

(20)

Radiator outlet hose

T2: 7.5 (0.76, 5.5)

(12)

Radiator main fan shroud

(21)

Radiator drain plug

T3: 12 (1.2, 8.9)

(13)

Radiator main fan, radiator main 
fan motor ASSY

(22)

O-ring

T4: 3.4 (0.35, 2.5)

(23)

Radiator lower bracket

CO-02149

T2

T1

T1

T4

T4

T3

T2

(1)

(2)

(3)

(4)

(5)

(5)

(5)

(5)

(6)

(7)

(8)

(9)

(10)

(13)

(12)

(11)

(20)

(21)

(22)

(23)

(24)

(25)

A

B

T2

T2

(14)

(14)

(14)

(28)

(26)

(27)

(14)

(17)

(16)

(15)

(18)

(14)

(14)

(14)

(14)

(19)

T2

T2

A

B

CO(H4SO 2.0)-6

COOLING

General Description

C: CAUTION

• Wear work clothing, including a cap, protective
goggles, and protective shoes during operation.
• Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
• Keep the disassembled parts in order and pro-
tect them from dust and dirt.
• Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly and replacement.

• Be careful not to burn yourself, because each
part on the vehicle is hot after running.
• Be sure to tighten fasteners including bolts and
nuts to specified torque.
• Place shop jacks or rigid racks at the specified
points.
• Before disconnecting connectors of sensors or
units, be sure to disconnect the ground cable from
battery.

D: PREPARATION TOOL

1. SPECIAL TOOL 

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

499977400

CRANK PULLEY 
WRENCH

Used for stopping rotation of crank pulley when 
removing and tightening crank pulley bolt. (2.0 L 
model)

499977100

CRANK PULLEY 
WRENCH

Used for stopping rotation of crank pulley when 
removing and tightening crank pulley bolt. (2.5 L 
model)

18231AA010

CAM SPROCKET 
WRENCH

• Used for removing and installing cam 
sprocket.
• CAM SPROCKET WRENCH (499207100) can 
also be used.

ST-499977400

ST-499977100

ST18231AA010