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Home >> Subaru >> 2017 >> Legacy 2.5i Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Cooling System (H6DO)) >> Engine Coolant >> Replacement >> Filling Of Engine Coolant

Filling Of Engine Coolant

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CAUTION: During work, set the select lever to "P" or "N" range and do not shift the lever.
  1. Pour cooling system conditioner through the filler neck.

    Cooling system protective agent: 

    Refer to "SPECIFICATION" for cooling system protective agent. Ref. to  SPECIFICATION  , General Description. 

  2. Pour engine coolant into the radiator up to the filler neck position.

    Recommended engine coolant: 

    Refer to "SPECIFICATION" for recommended engine coolant. Ref. to  SPECIFICATION  , General Description. 

    Engine coolant level: 

    Refer to "SPECIFICATION" for engine coolant level. Ref. to  SPECIFICATION  , General Description. 

    Engine coolant concentration: 

    Refer to "ADJUSTMENT" for the recommended engine coolant concentration. Ref. to  ADJUSTMENT  , Engine Coolant. 

    NOTE: The SUBARU Super Coolant contains anti-freeze and anti-rust agents, and is especially made for Subaru engines with an aluminum cylinder block. Be sure to use SUBARU Super Coolant, since other coolant may cause corrosion.
  3. Fill engine coolant into the reservoir tank up to "FULL" level.
    Fig 1: Identifying Engine Coolant Reservoir Tank Level Indicator
    G10264161Courtesy of SUBARU OF AMERICA, INC.
  4. Close the radiator cap and start the engine. Race 5 to 6 times at 3, 000 r/min or less, then stop the engine. (Complete this operation within 40 seconds.)
  5. Wait for one minute after the engine stops, and open the radiator cap. If the engine coolant level drops, add engine coolant into radiator up to the filler neck position.
  6. Perform the procedures 4) and 5) again.
  7. Attach the radiator cap and reservoir tank cap properly.
  8. Start the engine and operate the heater at maximum hot position and the blower speed setting to "LO". (A/C OFF)
  9. Run the engine at 3, 000 r/min or less until radiator fan starts and stops.
    NOTE: Be careful with the engine coolant temperature to prevent overheating.
  10. Stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less.
  11. Open the radiator cap. If the engine coolant level drops, add engine coolant into the radiator up to the filler neck position and the reservoir tank to "FULL" level.
  12. Attach the radiator cap and reservoir tank cap properly.
  13. Set the heater setting to maximum hot position and the blower speed setting to "LO" and start the engine. Perform racing at 3, 000 r/min or less. If the flowing sound is heard from the heater core, repeat the procedures from step  9
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