Cooling System: Testing and Inspection

Cooling system (FA20)

On-vehicle inspection

WARNING:
To avoid the risk of burn, do not remove the radiator cap when the engine and radiator are hot. The fluid and steam may blow out due to the pressure.





1. Coolant (SUBARU Super Coolant) level check
(1) When the engine is cold, make sure that the reservoir tank level is between the FULL line and LOW line.

NOTE:
If the fluid level is low, check for coolant leakage and refill the coolant to the FULL line.

CAUTION:
Do not use water instead of the coolant.

(2) Remove the radiator cap and make sure that the coolant is filled up to the radiator filler neck.
2. Coolant (SUBARU Super Coolant) check
(1) Remove the radiator cap.

WARNING:
To avoid the risk of burn, do not remove the radiator cap when the engine and radiator are hot. The fluid and steam may blow out due to the pressure.

(2) Check that there is no excessive rust or scale deposition around the radiator cap and water inlet.

NOTE:
If it is excessively dirty, replace the coolant.

(3) Install the radiator cap.
3. Coolant (SUBARU Super Coolant) leakage check

WARNING:
To avoid the risk of burn, do not remove the radiator cap when the engine and radiator are hot. The fluid and steam may blow out due to the pressure.





(1) Attach the radiator cap tester to the radiator.

NOTE:
If the engine coolant level is low, refill the coolant of the specified concentration from the radiator filler neck.

(2) Warm up the engine.
(3) Perform the pumping operation up to a pressure of 137 kPa {1.4 kgf/cm2, 20 psi} and make sure that the pressure does not decrease.

NOTE:
If the pressure decreases, check the hoses, radiator and water pump for leakage. If there is no leakage to the outside, check the heater core, cylinder block and cylinder head.