Subaru Legacy IV (2008 year). Service manual — part 494
CO(H6DO)-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)
Approx. 7.2 (7.6, 6.3)
Water pump
Type
Centrifugal impeller type
Discharge
performance I
Discharge rate
2 (US gal, Imp gal)/min.
320 (84.5, 70.4)
Pump speed — Discharge pressure
5,500 rpm — 176.5 kPa (18 mAq)
Engine coolant temperature
80°C (176°F)
Impeller diameter
mm (in)
73.2 (2.88)
Number of impeller vanes
6
Number of pump sprocket teeth
22
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
W
160
Sub fan
W
160
Fan diameter / Blade
Main fan
320 mm (12.6 in)/5
Sub fan
320 mm (12.6 in)/7
Radiator
Type
Down flow, pressure type
Core dimensions
Width × Height
× Thickness
mm (in)
690 × 349 × 16 (27.17 × 13.74 × 0.63)
Pressure range in
which cap valve is
open
kPa (kgf/cm
2
, psi)
Above: 108
r14.7
(1.1
r0.15, 16r2)
Below: The atmospheric pressure or less
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
—
A/C compressor
A/C middle pressure
switch
Engine coolant temperature
Increase: less than 95°C
(203°F)
Decrease: less than 93°C
(199°F)
Increase: 95 — 101°C
(203 — 214°F)
Decrease: 93 — 99°C
(199 — 210°F)
Increase: 102°C (216°F)
or more
Decrease: 100°C (212°F)
or more
OFF
0%
Refer to fig. (1)
100%
ON
OFF
Refer to fig. (2)
100%
ON
Refer to fig. (3)
100%
CO(H6DO)-3
General Description
COOLING
(A)
Fan speed (%)
(B)
Water temperature
(1)
A/C OFF control
(2)
A/C ON control (A/C middle
pressure switch OFF)
(3)
A/C ON control (A/C middle
pressure switch ON)
CO-02115
100
(1)
70
(A)
(B)
(2)
70
(A)
(B)
(3)
70
(A)
(B)
CO(H6DO)-4
General Description
COOLING
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 (0.7, 4.7)
(3)
Thermostat
(1)
(2)
(4)
(5)
T
T
(3)
CO-02291
CO(H6DO)-5
General Description
COOLING
2. RADIATOR AND RADIATOR FAN
(1)
Radiator lower bracket
(13)
Radiator sub fan motor
(24)
ATF pipe
(2)
Radiator lower cushion
(14)
Radiator sub fan shroud
(25)
ATF hose C
(3)
Engine coolant drain cock
(15)
Radiator main fan
(26)
ATF hose D
(4)
Radiator
(16)
Radiator main fan motor
(27)
Radiator fan control unit
(5)
Radiator upper bracket
(17)
Radiator main fan shroud
(6)
Radiator upper cushion
(18)
Engine coolant reservoir tank cap
Tightening torque:N·m (kgf-m, ft-lb)
(7)
Clip
(19)
Over flow hose
T1: 3.8 (0.4, 2.8)
(8)
Radiator inlet hose A
(20)
Engine coolant reservoir tank
T2: 5.4 (0.6, 4.0)
(9)
Clip
(21)
ATF hose clamp
T3: 6.2 (0.6, 4.6)
(10)
Radiator inlet hose B
(22)
ATF hose A
T4: 7.5 (0.8, 5.5)
(11)
Radiator outlet hose
(23)
ATF hose B
T5: 12 (1.2, 8.9)
(12)
Radiator sub fan
T1
T3
T4
T3
(12)
(14)
(27)
(16)
(13)
(15)
(17)
T1
T4
T2
CO-02508
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(7)
(9)
(9)
T4
T4
T5
(8)
(7)
(7)
(10)
(11)
(21)
(21)
(26)
(21)
(21)
(24)
(21)
(21)
(21)
(18)
(19)
(20)
(23)
(22)
(25)
T4
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