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Subaru Impreza 2004 - General Description

Subaru Impreza 2004
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CO(H4SO)-2
COOLING
General Description
1. General Description
A: SPECIFICATIONS
Cooling system Electric fan + Forced engine coolant circulation system
Total engine coolant capacity 2 (US qt, Imp qt)
1.6 L AT model:
Approx. 7.3 (7.71, 6.42)
1.6 L MT model:
Approx. 7.4 (7.82, 6.51)
2.0 L and 2.5 L AT model:
Approx. 6.9 (7.29, 6.07)
2.0 L and 2.5 L MT model:
Approx. 7.0 (7.4, 6.2)
Water pump
Type Centrifugal impeller type
Discharge perfor-
mance I
Discharge 20 2 (5.3 US gal, 4.4 Imp gal)/min.
Pump speedDischarge
pressure
760 rpm 2.9 kPa (0.3 mAq)
Engine coolant temperature 85°C (185°F)
Discharge perfor-
mance II
Discharge 100 2 (26.4 US gal, 22.0 Imp gal)/min.
Pump speedDischarge
pressure
3,000 rpm 49.0 kPa (5.0 mAq)
Engine coolant temperature 85°C (185°F)
Discharge perfor-
mance III
Discharge 200 2 (52.8 US gal, 44.0 Imp gal)/min.
Pump speedDischarge
pressure
6,000 rpm 225.4 kPa (23.0 mAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
Clearance between
impeller and case
Standard 0.5 0.7 mm (0.020 0.028 in)
Limit 1.0 mm (0.039 in)
Thrust runout of impeller end 0.5 mm (0.020 in)
Thermostat
Type Wax pellet type
Starts to open
Model with OBD: 80 84°C (176 183°F)
Model without OBD: 76 80°C (169 176°F)
Fully opened
Model with OBD: 95°C (203°F)
Model without OBD: 91°C (196°F)
Valve lift 9.0 mm (0.354 in) or more
Valve bore 35 mm (1.38 in)
Radiator fan
Motor
Main fan 70 W
Sub fan 70 W
Fan diameter × Blade
320 mm (11.81 in) × 5 (main fan)
320 mm (11.81 in) × 7 (sub fan)
Radiator
Type Down flow, pressure type
Core dimensions Width × Height × Thickness
691.5 × 340 × 16 mm
(27.22 × 13.39 × 0.63 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 2 (0.5 US qt, 0.4 Imp qt)

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