Coolant (FA20)
Removal / installation
COOLING
COOLANT (FA20)
REPLACEMENT
1. Coolant (SUBARU Super Coolant) draining
WARNING:
To avoid the risk of burn, do not remove the radiator cap SUB-ASSY when the engine and radiator are hot. The fluid and steam may blow out due to the pressure.
(1) Remove the service hole cover of front bumper under cover.
(2) Connect the hose with an inner diameter of φ 8 mm {0.315 in} to the drain plug.
(3) Loosen the radiator drain cock plug.
(4) Remove the radiator cap SUB-ASSY and drain the coolant.
2. Coolant (SUBARU Super Coolant) refill
NOTE:
Turn the A/C switch to OFF before refilling the coolant. (With air conditioning)
(1) Tighten the radiator drain cock plug.
(2) Fill the coolant of the specified concentration into the water inlet filler neck up to the filler neck position.
NOTE:
·The SUBARU Super Coolant contains anti-freeze and anti-rust agents for the engines with an aluminum cylinder block. Be sure to use the SUBARU Super Coolant, since the use of undesignated coolant may cause corrosion.
·Press the radiator hose No. 1 and radiator outlet hose several times and add the coolant if the level at the water inlet filler neck drops.
·Press the radiator hose No. 1 and radiator outlet hose several times and add the coolant if the level at the water inlet filler neck drops.
(3) Open the air bleeding plug on the heater hose side.
(4) If the level at the water inlet filler neck drops, fill the coolant into the radiator filler neck up to the filler neck position.
(5) Close the air bleeder valve when the coolant comes out from the air bleeder plug on the heater hose side.
(6) Fill the coolant of the specified concentration up to the FULL level of radiator reservoir tank.
(7) Tighten the radiator cap. [Preparatory Code #1]
(8) Start the engine. Race 5 to 6 times at 3,000 r/min or less and then stop the engine. [Preparatory Code #2]
NOTE:
Complete this operation within 40 seconds.
(9) After about 1 minute, remove the radiator cap, open the air bleeding plug of heater hose side and fill the coolant if the level at the water inlet filler neck is low, and then close the air bleeding plug. [Preparatory Code #3]
(10) Repeat the steps [*1], [*2] and [*3] until the level at the water inlet filler neck does not drop.
NOTE:
When the engine warms up and the thermostat valve opens, the air from the radiator hose No. 1 enters into the radiator side. Therefore, complete the steps before the engine warms up.
(11) Tighten the radiator cap and radiator reservoir tank cap.
(12) Start the engine and operate the heater at maximum hot position and the blower speed setting to “LO”.
(13) Run the engine at 2,000 r/min or less until the radiator fan starts and stops. [Preparatory Code #4]
NOTE:
Be careful with the engine coolant temperature to prevent overheating.
(14) Stop the engine and wait until the coolant temperature lowers to 30°C (86°F) or less. [Preparatory Code #5]
(15) Remove the radiator cap, and if the coolant level drops, fill the coolant into the radiator up to the filler neck position and the radiator reservoir tank up to its FULL level. [Preparatory Code #6]
(16) Tighten the radiator cap. [Preparatory Code #7]
(17) 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. [Preparatory Code #8]
(18) If the flowing sound of engine coolant is heard from the heater core at this time, perform the steps [*4], [*5], [*6], [*7] and [*8] again.
(19) When the level does not drop any more, adjust the level of radiator reservoir tank to the FULL line.
3. Leak check of coolant (SUBARU Super Coolant) (Refer to 
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