Subaru Legacy III (2000-2003 year). Manual - part 276

CO(H6DO)-2

COOLING

GENERAL DESCRIPTION

1. General Description

A: SPECIFICATIONS

Cooling system

Electric fan + Forced engine coolant circula-

tion system

Total engine coolant capacity

2

 (US qt, Imp qt)

Approx. 7.9 (8.4, 7.0)

Water  pump

Type

Centrifugal impeller type

Discharge performance

Discharge

320 L (84.5 US gal, 70.4 Imp gal)/min.

Pump speed—total engine 
coolant head

5,500 rpm — 18 mAq (59 ft Aq)

Engine coolant temperature

80

°

C (176

°

F)

Impeller diameter

73.2 mm (2.882 in)

Number of impeller vanes

6

Tooth number of pump sprocket

22 t

Thermostat

Type

Wax pellet type

Start to open

80 — 84 

°

C (176 — 183 

°

F)

Fully open

95

°

C (203

°

F)

Valve lift

9.0 mm (0.354 in) or more

Valve bore

35 mm (1.38 in)

Radiator fan

Motor

120 W (main fan)

120 W (sub fan)

Fan diameter 

×

 Blade

320 mm (12.60 in) 

×

 5 (main fan)

320 mm (12.60 in) 

×

 7 (sub fan)

Radiator

Type

Down flow, pressure type

Core dimensions

699 

×

 349 

×

 27 mm

(27.52 

×

 13.74 

×

 1.06 in)

Pressure range in which cap valve is open

Above: 108

±

15 kPa

(1.1

±

0.15 kg/cm

2

, 16

±

2 psi)

Below: 

−

1.0 to 

−

4.9 kPa

(

−

0.01 to 

−

0.05 kg/cm

2

, 

−

0.1 to 

−

0.7 psi)

Fins

Corrugated fin type

Reservoir 
tank

Capacity

0.5 L (0.5 US qt, 0.4 Imp qt)

CO(H6DO)-3

COOLING

GENERAL DESCRIPTION

B: COMPONENT

1. WATER PUMP

(1) Water pump ASSY

(4) Gasket

Tightening torque: N·m (kgf-m, ft-lb)

(2) O-ring

(5) Thermostat cover

T: 6.4 (0.65, 4.7)

(3) Thermostat

CO-00106

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

T

T

CO(H6DO)-4

COOLING

GENERAL DESCRIPTION

2. RADIATOR AND RADIATOR FAN

(1) Radiator lower bracket

(12) Radiator sub fan

(23) ATF outlet hose A

(2) Radiator lower cushion

(13) Radiator sub fan motor

(24) ATF pipe

(3) Drain cock

(14) Sub fan shroud

(25) ATF inlet hose B

(4) Radiator

(15) Radiator main fan

(26) ATF outlet hose B

(5) Radiator upper bracket

(16) Radiator main fan motor

(6) Radiator upper cushion

(17) Main fan shroud

Tightening torque: N·m (kgf-m, ft-lb)

(7) Clamp

(18) Engine coolant reservoir tank cap

T1: 4.4 (0.45, 3.3)

(8) Radiator inlet hose A

(19) Over flow hose

T2: 4.9 (0.50, 3.6)

(9) Clamp

(20) Engine coolant reservoir tank

T3: 7.5 (0.76, 5.5)

(10) Radiator inlet hose B

(21) ATF hose clamp

T4: 12 (1.2, 8.7)

(11) Radiator outlet hose

(22) ATF inlet hose A

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )

( 7 )

( 7 )

( 7 )

T4

T1

T3

T1

T2

T2

T3

T4

T2

T4

T4

( 8 )

( 9 )

( 9 )

(10)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

(19)

(20)

(23)

(22)

(21)

(21)

(21)

(21)

(24)

(21)

(21)

(21)

(26)

(25)

CO-00107

CO(H6DO)-5

COOLING

GENERAL DESCRIPTION

C: CAUTION

• Wear working clothing, including a cap, protec-
tive goggles, and protective shoes during opera-
tion.
• Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
• Keep the disassembled parts in order and pro-
tect them from dust or 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 your hands, because each
part in the vehicle is hot after running. 
• Be sure to tighten fasteners including bolts and
nuts to the specified torque.
• Place shop jacks or safety stands at the specified
points.
• Before disconnecting electrical connectors of
sensors or units, be sure to disconnect ground ca-
ble from battery.

D: PREPARATION TOOL

1. SPECIAL TOOLS

2. GENERAL PURPOSE TOOLS

ILLUSTRATION

TOOL NUMBER

DESCRIPTION

REMARKS

499977100

CRANK PULLEY 
WRENCH

Used for stopping crankshaft pulley when loosen-
ing and tightening crankshaft pulley bolts.

18231AA000

CAMSHAFT 
SPROCKET 
WRENCH

Used for removing and installing camshaft 
sprocket.

TOOL NAME

REMARKS

Radiator cap tester

Used for measuring pressure.

ST-499977100

ST18231AA000