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.
2003 Subaru Outback F6-3.0LFACTORY OEM SERVICE PROCEDURE
Coolant: Service and Repair
REPLACEMENT
DRAINING OF ENGINE COOLANT
1. Lift-up the vehicle.
2. Remove under cover.
3. Remove drain cock to drain engine coolant into container.
NOTE: Remove radiator cap so that engine coolant will drain faster.
FILLING OF ENGINE COOLANT
1. Fill engine coolant into radiator up to filler neck position.
Coolant amount for refill: Approximately 7.9 l (8.4 US qt, 7.0 Imp qt)
CAUTION: The SUBARU Genuine Coolant containing antifreeze and anti-rust agents is especially made for SUBARU engine, which has an aluminum crankcase. Always use SUBARU Genuine Coolant, since other coolant may cause corrosion.
2. Fill engine coolant into reservoir tank up to upper level.
3. Attach radiator cap and reservoir tank cap properly.
4. Warm-up engine completely for more than five minutes at 2,000 to 3,000 rpm.
5. If engine coolant level drops in radiator, add engine coolant to filler neck position.
6. If engine coolant level drops from upper level of reservoir tank, add engine coolant to upper level.
7. Attach radiator cap and reservoir tank cap properly.
DRAINING OF ENGINE COOLANT
1. Lift-up the vehicle.
2. Remove under cover.
3. Remove drain cock to drain engine coolant into container.
NOTE: Remove radiator cap so that engine coolant will drain faster.
FILLING OF ENGINE COOLANT
1. Fill engine coolant into radiator up to filler neck position.
Coolant amount for refill: Approximately 7.9 l (8.4 US qt, 7.0 Imp qt)
CAUTION: The SUBARU Genuine Coolant containing antifreeze and anti-rust agents is especially made for SUBARU engine, which has an aluminum crankcase. Always use SUBARU Genuine Coolant, since other coolant may cause corrosion.
2. Fill engine coolant into reservoir tank up to upper level.
3. Attach radiator cap and reservoir tank cap properly.
4. Warm-up engine completely for more than five minutes at 2,000 to 3,000 rpm.
5. If engine coolant level drops in radiator, add engine coolant to filler neck position.
6. If engine coolant level drops from upper level of reservoir tank, add engine coolant to upper level.
7. Attach radiator cap and reservoir tank cap properly.
Factory Service Tools
Use the Manual With the Right Hardware
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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.