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Engine Coolant: Replacement

  1. DRAINING OF ENGINE COOLANT 
    1. Lift up the vehicle.
    2. Remove the under cover. Refer to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>REMOVAL .
    3. Remove the drain plug to drain engine coolant into container.
      NOTE: Remove the radiator cap so that engine coolant will drain faster.
      G09480748Courtesy of SUBARU OF AMERICA, INC.
    4. Install the drain plug.
      NOTE: Use new O-rings.
    5. Install the undercover. Refer to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION .
  2. FILLING OF ENGINE COOLANT 
    CAUTION: For CVT models, set the select lever to "P" or "N" range (for MT models, the shift lever in neutral) during work, 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. Refer to COOLING (EXCEPT FOR STI)>GENERAL DESCRIPTION>SPECIFICATION .

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

      Recommended engine coolant: 

      Refer to "SPECIFICATION" for recommended engine coolant. Refer to COOLING (EXCEPT FOR STI)>GENERAL DESCRIPTION>SPECIFICATION .

      Engine coolant level: 

      Refer to "SPECIFICATION" for engine coolant level. Refer to COOLING (EXCEPT FOR STI)>GENERAL DESCRIPTION>SPECIFICATION .

      Engine coolant concentration: 

      Refer to "ADJUSTMENT" for the recommended engine coolant concentration. Refer to COOLING (EXCEPT FOR STI)>ENGINE COOLANT>ADJUSTMENT .

      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.
    G10267204Courtesy 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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