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Filling Of Engine Coolant

CAUTION:
  • Pay close attention to the procedures, because some of the air bleeding procedures differ between when performing a normal engine coolant replacement and when draining the engine coolant from the rear heater system.
  • During work, set the select lever to "P" or "N" range and do not shift the lever.
  • If the engine coolant is spilt over the engine, exhaust pipe or the under cover, completely wipe it off to avoid emission of smoke or causing a fire.

Engine coolant: 

Refer to "RECOMMENDED MATERIALS" for engine coolant. Ref. to RECOMMENDED MATERIALS .

Engine coolant concentration: 

Refer to "ADJUSTMENT" for the recommended engine coolant concentration. Ref. to COOLING (H4DOTC)>Engine Coolant>ADJUSTMENT .

Engine coolant level: 

Refer to "SPECIFICATION" for engine coolant level. Ref. to COOLING (H4DOTC)>General Description>SPECIFICATION .

Cooling system protective agent: 

Refer to "RECOMMENDED MATERIALS" for cooling system protective agent. Ref. to RECOMMENDED MATERIALS .

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.
  1. Remove the air bleeding cap of the front hose heater outer front.
    G13199093Courtesy of SUBARU OF AMERICA, INC.
  2. Attach the ST to the radiator filler neck.

    Preparation tool: 

    ST: ST COOLANT CHARGER (45099SJ000)

    G13862895Courtesy of SUBARU OF AMERICA, INC.
  3. Fill the ST with cooling system conditioner.
  4. Fill the engine coolant in the ST. When the engine coolant comes out of the air bleeding plug on the front hose heater outer front, install the air bleeding cap.
  5. Fill engine coolant into the ST.
  6. Install the reservoir tank cap.
  7. Charge refrigerant. (When the refrigerant has been recollected) Ref. to AIR CONDITIONER>Refrigerant Charging Procedure>PROCEDURE .
  8. Start the engine, and race 5 to 6 times at 3, 000 r/min or less, then stop the engine.
    NOTE: Complete this operation within 40 seconds.
  9. Wait for one minute after the engine stops. If the engine coolant level drops, add the engine coolant into the ST.
  10. Perform the steps 8 and 9 again.
  11. Start the engine and operate the A/C at maximum hot position, with the blower speed setting at "LO", and the A/C switch at "OFF".
  12. Run the engine at 3, 000 r/min or less until the radiator fan starts and then stops.
    CAUTION: Frequently check the engine coolant temperature in order to avoid overheat.
  13. Stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less.
  14. If the engine coolant level drops, add the engine coolant into the ST.
  15. Keep the A/C setting to maximum hot position, the blower speed setting to "LO", and the A/C switch to "OFF", and start the engine. Perform racing at 3, 000 r/min or less. If the flowing sound of engine coolant is heard from the heater core (front), repeat the procedures from step 12.
  16. When the engine coolant has been drained from the front heater system
    1. Stop the engine, remove the ST, and install the radiator cap.
      CAUTION: Prepare a container and cloth when performing the work in order to prevent scattering of engine coolant. If the oil spills, wipe it off immediately to prevent from penetrating into floor or flowing out for environmental protection.
    2. Make sure the engine coolant level in the reservoir tank is between "FULL" and "LOW", and adjust if necessary. Ref. to COOLING (H4DOTC)>Engine Coolant>INSPECTION .
  17. When the engine coolant has been drained from the rear heater system
    1. Stop the engine and block the front hose heater inner front (A) using hose clamps, etc.
      G13199094Courtesy of SUBARU OF AMERICA, INC.
    2. Start the engine, and race 5 to 6 times at 3, 000 r/min or less, then stop the engine.
    3. Wait until the engine coolant temperature lowers to 30°C (86°F) or less.
    4. Remove the air bleeding cap of the front hose heater outer front.
    5. Fill the engine coolant in the ST. When the engine coolant comes out of the air bleeding plug on the front hose heater outer front, install the air bleeding cap.
    6. Fill engine coolant into the ST.
    7. Start the engine and operate the rear A/C at maximum hot position, with the blower speed setting at "LO", and the A/C switch at "OFF".
    8. Run the engine at 3, 000 r/min or less until the radiator fan starts and then stops.
      CAUTION: Frequently check the engine coolant temperature in order to avoid overheat.
    9. Check that the air temperature from the rear A/C is kept constant. If the temperature is unstable, stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less. Then perform the procedures from step (6) again.
    10. Stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less.
    11. If the engine coolant level drops, add the engine coolant into the ST.
    12. Keep the rear A/C setting to maximum hot position, the blower speed setting to "LO", and the A/C switch to "OFF", and start the engine. Perform racing at 3, 000 r/min or less. If the flowing sound of engine coolant is heard from the heater core (rear), repeat the procedures from step (8).
    13. Stop the engine and remove the hose clamps, etc. from the front hose heater inner front.
    14. Remove the ST and install the radiator cap.
      CAUTION: Prepare a container and cloth when performing the work in order to prevent scattering of engine coolant. If the oil spills, wipe it off immediately to prevent from penetrating into floor or flowing out for environmental protection.
    15. Make sure the engine coolant level in the reservoir tank is between "FULL" and "LOW", and adjust if necessary. Ref. to COOLING (H4DOTC)>Engine Coolant>INSPECTION .
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