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Subaru Legacy IV (2008 year). Manual - part 79

CO(H4SO)-2

General Description

COOLING

1. General Description

A: SPECIFICATION

Cooling system

Electric fan + Forced engine

coolant circulation system

Total engine coolant capacity

2 (US qt, Imp qt)

MT: approx. 6.4 (6.8, 5.6)

AT: Approx. 6.3 (6.7, 5.5)

Water pump

Type

Centrifugal impeller type

Discharge performance I

Discharge rate

2 (US gal, Imp gal) /min.

20 (5.3, 4.4)

Pump speed — Discharge pressure

760 rpm — 2.9 kPa (0.3 mAq)

Engine coolant temperature

80°C (176°F)

Discharge performance II

Discharge rate

2 (US gal, Imp gal) /min.

100 (26.4, 22.0)

Pump speed — Discharge pressure

3,000 rpm — 49 kPa (5.0 mAq)

Engine coolant temperature

80°C (176°F)

Discharge performance III

Discharge rate

2 (US gal, Imp gal) /min.

200 (52.8, 44.0)

Pump speed — Discharge pressure

6,000 rpm — 225.4 kPa (23 mAq)

Engine coolant temperature

80°C (176°F)

Impeller diameter

mm (in)

76 (2.99)

Number of impeller vanes

Pump pulley diameter

mm (in)

60 (2.36)

Clearance between impeller and case

Standard

mm (in)

0.5 — 1.5 (0.020 — 0.060)

Thermostat

Type

Wax pellet type

Starting temperature to open

80 — 84°C (176 — 183°F)

Fully opens

95°C (203°F)

Valve lift

mm (in)

9.0 (0.354) or more

Valve bore

mm (in)

35 (1.38)

Radiator fan

Motor input

Main fan

90 W

Sub fan

90 W

Fan diameter / Blade

Main fan

300 mm (11.81 in)/4

Sub fan

300 mm (11.81 in)/5

Radiator

Type

Down flow, pressure type

Core dimensions

Width × Height × Thickness

mm (in)

687.4 × 340 × 16

(27.06 × 13.39 × 0.63)

Pressure range in which cap valve is open

kPa (kg/cm

, psi)

Above: 108

r15 or more

(1.1

r0.15, 16r2)

Below: –1.0 to –4.9 or less

(–0.01 — –0.05, –0.1 — –0.7)

Fins

Corrugated fin type

Reservoir tank

Capacity

2 (US qt, Imp qt)

0.45 (0.48, 0.40)

Recommended materials

Item number

Alternative

Coolant

SUBARU SUPER COOLANT (Concentrated type)

—

SUBARU SUPER COOLANT (Diluted type)

K0670Y0000

Water for dilution

Distilled water

—

Soft water or tap water

Cooling system
protective agent

Cooling system conditioner

SOA345001

—

CO(H4SO)-3

General Description

COOLING

B: COMPONENT

1. WATER PUMP

(1)

Water pump ASSY

(5)

Gasket

Tightening torque:N·m (kgf-m, ft-lb)

(2)

Gasket

(6)

Thermostat cover

T1: First 12 (1.2, 8.9)

(3)

Heater by-pass hose

(7)

Clip

Second 12 (1.2, 8.9)

(4)

Thermostat

T2: 12 (1.2, 8.9)

CO-02484

(6)

(4)

(1)

(5)

(2)

(3)

(7)

CO(H4SO)-4

General Description

COOLING

2. RADIATOR & RADIATOR FAN

(1)

Radiator lower cushion

(12)

Radiator main fan shroud

(22)

O-ring

(2)

Radiator

(13)

Radiator main fan, radiator main
fan motor ASSY

(23)

Radiator lower bracket

(3)

Radiator upper cushion

(24)

Radiator cap

(4)

Radiator upper bracket

(14)

ATF hose clip (AT model)

(25)

Heat shield cover (AT model)

(5)

Clip

(15)

ATF hose A (AT model)

(6)

Radiator inlet hose

(16)

ATF hose B (AT model)

Tightening torque:N·m (kgf-m, ft-lb)

(7)

Engine coolant reservoir tank cap

(17)

ATF pipe (AT model)

T1: 5 (0.5, 3.7)

(8)

Over flow hose

(18)

ATF hose C (AT model)

T2: 7.5 (0.8, 5.5)

(9)

Engine coolant reservoir tank

(19)

ATF hose D (AT model)

T3: 12 (1.2, 8.9)

(10)

Radiator sub fan shroud

(20)

Radiator outlet hose

T4: 3.4 (0.3, 2.5)

(11)

Radiator sub fan, radiator sub fan
motor ASSY

(21)

Radiator drain plug

T5: 3 (0.3, 2.2)

(7)

(1)

(2)

(3)

(4)

(5)

(6)

(9)

(10)

(13)

(12)

(11)

(20)

(21)

(22)

(23)

(24)

(14)

(16)

(15)

(17)

(18)

(19)

(14)

(8)

(25)

CO-02353

(14)

CO(H4SO)-5

General Description

COOLING

C: CAUTION

• Wear appropriate work clothing, including a cap,
protective goggles and protective shoes when per-
forming any work.
• 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.
• Vehicle components are extremely hot after driv-
ing. Be wary of receiving burns from heated parts.
• Be sure to tighten fasteners including bolts and
nuts to the 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.
• Prepare a container and cloth to prevent scatter-
ing of engine coolant when performing work where
engine coolant can be spilled. If the fuel spills, wipe
it off immediately to prevent from penetrating into
floor or flowing out for environmental protection.
• Follow all government and local regulations con-
cerning disposal of refuse when disposing engine
coolant.

Content .. 77 78 79 80 ..