Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2005OUTBACK I, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)COOLING SYSTEM (H4SO)GENERAL DESCRIPTIONSPECIFICATION
2005 Subaru Outback i, Standard
Cooling System (H4SO): General Description: Specification
2005 Subaru Outback i, StandardSECTION Specification
SPECIFICATION
| Cooling system | Electric fan + Forced engine coolant circulation system | |||
|---|---|---|---|---|
| Total engine coolant capacity | l (US qt, Imp qt) | MT: approx. 6.4 (6.8, 5.6) AT: approx. 6.3 (6.7, 5.5) |
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| Water pump | Type | Centrifugal impeller type | ||
| Discharge performance I | Discharge | l (US gal, Imp gal) / min | 18(4.8, 4.0) | |
| Pump speed - Discharge pressure | 1, 000 RPM - 7 kPa (0.7 mAq) | |||
| Engine coolant temperature | 85°C(185°F) | |||
| Discharge performance II | Discharge | l (US gal. Imp gal) / min | 70(18.5, 15.4) | |
| Pump speed - Discharge pressure | 3, 000 RPM - 55 kPa (5.6 mAq) | |||
| Engine coolant temperature | 85°C(185°F) | |||
| Discharge performance III | Discharge | l (US gal, Imp gal)/ min | 153(40.4, 33.7) | |
| Pump speed - Discharge pressure | 6, 000 RPM - 217 kPa (22.1 mAq) | |||
| Engine coolant temperature | 85°C(185°F) | |||
| Impeller diameter | mm (in) | 74(2.91) | ||
| Number of impeller vanes | 8 | |||
| Pump pulley diameter | mm (in) | 60(2.36) | ||
| Clearance between impeller and case | Standard | mm (in) | 0.4-1.6(0.016 - 0.063) | |
| Thermostat | Type | Wax pellet type | ||
| Starting temperature to open | 76 - 80°C(169 - 176°F) | |||
| Fully opens | 91°C(196°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 / Blades | 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 x Height x Thickness | mm (in) | 687.4 x 340 x 16 (27.06 x 13.39 x 0.63) | |
| Pressure range in which cap valve is open | KPa (kg/cm2 , psi) | Above: 108+/-15, or more (1.1+/-0.15, 16+/-2) Below: -1.0- -4.9, or less (-0.01- -0.05, -0.1- -0.7) |
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| Fins | Corrugated fin type | |||
| Reservoir tank | Capacity | l (US qt, Imp qt) | 0.45 (0.48, 0.40) | |
| Vehicle speed | A/C compressor load | Engine coolant temperature | ||
| Rising: 95°C (203°F) or less Descending: 92°C (198°F)or less |
Rising: 96 - 99°C (205 -210°F) Descending: 93 - 94°C(199 - 201°F) |
Rising: 100°C(212°F) or more Descending: 95°C (203°F) or more |
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| Operation of radiator fan | Operation of radiator fan | Operation of radiator fan | ||
| At acceleration: 19 km/h (12 MPH) or less At deceleration: 10 km/h (6 MPH) or less |
OFF | OFF | Low-Speed | High-Speed |
| Low | Low-Speed | Low-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| At acceleration: 20 - 69 km/h (12 - 43 MPH) At deceleration: 11 - 64 Km/h (7 - 40 MPH) |
OFF | OFF | Low-Speed | High-Speed |
| Low | High-Speed | High-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| At acceleration: 70 - 105 km/h (43 - 65 MPH) At deceleration: 65 - 103 km/h (40 - 64 MPH) |
OFF | OFF | Low-Speed | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | Low-Speed | High-Speed | High-Speed | |
| At acceleration: 106 km/h (66 MPH) or more At deceleration: 104 km/h (65 MPH) or more |
OFF | OFF | OFF | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | OFF | Low-Speed | High-Speed | |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.