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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Cooling System (HEV)) >> Engine Coolant >> Replacement >> Filling Of Engine Coolant >> Engine Side

Engine Side

WARNING: This page is about a different variant/trim than selected.
CAUTION:
  • If filling of engine coolant on the inverter assembly side is also required, fill to the inverter assembly side first.
  • During work, set the select lever to "P" range and do not shift the lever.
  • If the engine coolant splashes, completely remove and clean it.
NOTE: The SUBARU Super Coolant contains anti-freeze and anti-rust agents, and is especially made for Subaru engines with an aluminium cylinder block. Be sure to use SUBARU Super Coolant, since other coolant may cause corrosion.

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 (H4DO (HEV))>ENGINE COOLANT>ADJUSTMENT .

Engine coolant level: 

Refer to "SPECIFICATION" for engine coolant level. Ref. to COOLING (H4DO (HEV))>GENERAL DESCRIPTION>SPECIFICATION .

Cooling system protective agent: 

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

  1. Remove the water tank pipe cap.
    G13231200Courtesy of SUBARU OF AMERICA, INC.
  2. Loosen the air bleed plug on the heater outlet hose.
    G13231201Courtesy of SUBARU OF AMERICA, INC.
  3. Attach the ST to the radiator filler neck.

    Preparation tool: 

    ST: ST COOLANT CHARGER (45099SJ000)

    G13601816Courtesy of SUBARU OF AMERICA, INC.
  4. Fill the ST with cooling system conditioner.
  5. Pour engine coolant into the radiator and top off to the opening of the water tank pipe cap.
    NOTE:
    • Fill engine coolant through ST.
    • Using a stopper accompanied with ST, perform operation while adjusting the filling amount of engine coolant so that it does not blow out through the opening of the water tank pipe cap.
  6. Install the water tank pipe cap.
    CAUTION: Always use the water tank pipe cap, since its function is different from the radiator cap.
  7. After pouring in the engine coolant through ST, close the air bleeding plug when the engine coolant comes out of the air bleeding plug on the heater outlet hose.
  8. Fill engine coolant into the ST.
  9. Install the reservoir tank cap.
  10. Charge refrigerant. (When the refrigerant has been recollected) Ref. to AIR CONDITIONER (HEV)>REFRIGERANT CHARGING PROCEDURE>PROCEDURE .
  11. Navigate to Inspection Mode for measuring Exhaust Gas. Ref. to P-HEV HYBRID POWERTRAIN CONTROL (DIAGNOSTICS)>WORK SUPPORT>OPERATION>SERVICE MODE .
    NOTE: If it is necessary to run the engine for 10 minutes or more, fasten the driver's seat belt.
  12. Start the engine, and race 5 to 6 times, then stop the engine.
    NOTE: Complete this operation within 40 seconds.
  13. Wait for one minute after the engine stops. If the engine coolant level drops, add the engine coolant into the ST.
  14. Perform the procedures  11,  12 and  13 again.
  15. Perform the procedures  11 again.
  16. 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".
  17. Run the engine with the accelerator pedal fully opened, until the radiator fan starts and then stops.
    CAUTION: Frequently check the engine coolant temperature in order to avoid overheat.
  18. Stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less.
  19. If the engine coolant level drops, add the engine coolant into the ST.
  20. Perform step  11 again with the air conditioner setting at maximum hot position and the blower speed setting at "LO", and the A/C switch at "OFF".
  21. Start the engine and race it. If the flowing sound of engine coolant is heard from the heater core, repeat the procedures from step  17.
  22. 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.
  23. Make sure the engine coolant level in the reservoir tank is between "FULL" and "LOW", and adjust if necessary.
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