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Engine Cooling System (H4SO) (Except Sti): Specifications Subaru Impreza GH

Cooling System (Mechanical) 2 illustrations

SPECIFICATION

Cooling systemElectric fan + Forced engine coolant circulation system
Total engine coolant capacityL (US qt, lmp qt)AT model: Approx. 6.7 (7.1,5.9)
MT model: Approx. 6.8 (7.2, 6.0)
Water pumpTypeCentrifugal impeller type
Discharge performance IDischarge rateL (Ug gal, lmp gal)/min20 (5.3,4.4)
Pump speed - Discharge pressure760 RPM - 2.9 kPa (0.3 mAq)
Engine coolant temperature80°C (176°F)
Discharge performance IIDischargeL (US gal) lmp gal)/min100 (26.4, 22.0)
Pump speed - Discharge pressure3,000 RPM - 49 kPa (5.0 mAq)
Engine coolant temperature80°C (176°F)
Discharge performance IIIDischargeL (US gal, lmp gal)/min.200 (52.8, 44.0)
Pump speed - Discharge pressure6,000 RPM - 225.4 kPa (23 mAq)
Engine coolant temperature80°C (176°F)
Impeller diameterMm (in)76 (2.99)
Number of impeller vanes8
Pump pulley diameterMm (in)60 (2.36)
Clearance between impeller and caseStandardMm (in)0.5 - 1.5 (0.020 - 0.060)
ThermostatTypeWax pellet type
Starting temperature to open80 -84°C(176 - 183°F)
Fully opens95°C (203°F)
Valve liftMm (in)9.0 (0.354) or more
Valve boreMm (in)35(1.38)
Radiator fanMotor inputMain fan90 W
Sub fan90 W
Fan diameter/BladeMain fan300 mm (11.81 in)/4
Sub fan300 mm (11.81 in)/5
RadiatorTypeDown flow, pressure type
Core dimensionsWidth x Height x ThicknessMm (in)687.4 x 340 x 16 (27.06 x 13.39 x 0.63)
Pressure range in which cap 2 valve is openKPa (kg/cm 2 , psi)Above: 108±14.7 (1.1±0.15,16±2.1)
Below: -1.0 - -4.9 (-0.01 - -0.05, -0.1 - -0.7)
FinsCorrugated fin type
Reservoir tankCapacityL (US qt, lmp qt)0.45 (0.48, 0.40)

SPECIFICATION CHART

Recommended materialsItem numberAlternative
CoolantSUBARU SUPER COOLANT (Concentrated type)
SUBARU SUPER COOLANT (Diluted type)K0670Y0000
Water for dilutionDistilled waterSoft water or tap water
Cooling system protective agentCooling system conditionerS0A345001

COOLANT SPECIFICATION

Scheme 36

Scheme 36: WATER PUMP

Tightening torque: N.m (kgf-m, ft-lb)

T1: First 12 (1.2, 8.9)

Second 12 (1.2, 8.9)

T2: 12 (1.2, 8.9)

Scheme 37

Scheme 37: RADIATOR&RADIATOR FAN

Tightening torque: N.m (kgf-m, ft-lb)

T1. 5 (0.5, 3.7)

T2: 7.5 (0.8, 5.5)

T3: 12 (13, 8.9)

T4: 3.4 (0.3, 2.5)

T5

3 (0.3, 2.2)