Filling Of Engine Coolant

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

For CVT models, set the select lever to "P" or "N" range (for MT models, the MT shift lever in neutral) during work, 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.

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.
Refer to "SPECIFICATION" for engine coolant concentration. Ref. to COOLING (H4DOTC)>GENERAL DESCRIPTION>SPECIFICATION>ENGINE COOLANT>CONCENTRATION .
Refer to "SPECIFICATION" for engine coolant level. Ref. to COOLING (H4DOTC)>GENERAL DESCRIPTION>SPECIFICATION>ENGINE COOLANT>CAPACITY .

Preparation items:

Engine coolant: Refer to "SPECIFICATION" for engine coolant. Ref. to COOLING (H4DOTC)>GENERAL DESCRIPTION>SPECIFICATION>ENGINE COOLANT>TYPE .

Attach the ST to the radiator filler neck.
Preparation tool:

ST: ST COOLANT CHARGER (45099SJ000)

Courtesy of SUBARU OF AMERICA, INC.
Fill the ST with cooling system conditioner.
Preparation items:

Cooling system protective agent: Refer to "SPECIFICATION" for cooling system protective agent. Ref. to COOLING (H4DOTC)>GENERAL DESCRIPTION >SPECIFICATION >ENGINE COOLANT>TYPE .
Fill engine coolant into the ST.
Charge refrigerant. (When the refrigerant has been recollected) Ref. to AIR CONDITIONER>REFRIGERANT CHARGING PROCEDURE>PROCEDURE .
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.
Wait for one minute after the engine stops. If the engine coolant level drops, add the engine coolant into the ST.
Perform the procedures 5 and 6 again.
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".
9. 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.
Stop the engine and wait until the engine coolant temperature lowers to 30°C (86°F) or less.
If the engine coolant level drops, add the engine coolant into the ST.
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, repeat the procedures from step 9.
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.
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>ENGINE COOLANT LEVEL CHECK .