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 MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE COOLING SYSTEM (H6DO))GENERAL DESCRIPTIONSPECIFICATION
2016 Subaru Legacy 2.5i
Section 1 (Engine Cooling System (H6DO)): General Description: Specification
2016 Subaru Legacy 2.5iSECTION Specification
WARNING: This page is about a different variant/trim than selected.
| Cooling system | Electric fan + Forced engine coolant circulation system | ||||
| Total engine coolant capacity | L (US qt, Imp qt) | 7.0 (7.4, 6.2) | |||
| Water pump | Type | Centrifugal impeller type | |||
| Discharge performance | Discharge rate | L (US gal, Imp gal)/min | 240 (63.4, 52.8) | ||
| Pump speed - Discharge pressure | 4, 956 r/min - 140 kPa (14.0 mAq) | ||||
| Engine coolant temperature | 80°C (176°F) | ||||
| Impeller diameter | mm (in) | 66 (2.60) | |||
| Number of impeller blades | 8 | ||||
| Pump sprocket outer diameter | mm (in) | 60.60 (2.39) | |||
| 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 opening size | mm (in) | 35 (1.38) | |||
| Radiator fan | Motor input | Main fan | W | 240 | |
| Sub fan | W | 240 | |||
| Fan diameter/Blade | Main fan | 320 mm (12.6 in)/7 | |||
| Sub fan | 320 mm (12.6 in)/9 | ||||
| Radiator | Type | Down flow, pressure type | |||
| Core dimensions | Width X Height X Thickness | mm (in) | 702.6 X 349.2 X 27 (27.66 X 13.75 X 1.06) | ||
| Pressure range in which cap valve is open | kPa (kg/cm2 , psi) | Positive pressure side | Standard | 93 - 123 (0.95 - 1.25, 14 - 18) | |
| Limit | 83 (0.85, 12) | ||||
| Negative pressure side | Standard | -1.0 - -4.9 (-0.01 - -0.05, -0.1 - -0.7) | |||
| Fins | Corrugated fin type | ||||
| Reservoir tank | Capacity | L (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) | K0670Y0001 | ||
| Water for dilution | Distilled water | - | Soft water or tap water |
| Cooling system protective agent | Cooling system conditioner | SOA345001 | - |
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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.