Cooling System: Inspection

To check the radiator for leakage, fill it with engine coolant, and attach the radiator cap tester (A) to the filler neck, and apply pressure.
Pressure:

Non-turbo model

157 kPa (1.6 kg/cm ² , 23 psi)

Turbo model

122 kPa (1.2 kg/cm ² ,18 psi)

Check the following points:
- Leak from radiator
- Hose joints and other connections for leakage
CAUTION:
- For Turbo model, inspection must be carried out at the side of coolant filler tank, not at the side of radiator.
- Be particularly careful not to deform the filler neck of radiator when installing and removing the tester and after testing.
- When performing this check, be sure to keep the engine stationary and fill radiator with coolant.
- Wipe off check points before applying pressure.
- Use care not to spill coolant when detaching tester from radiator.
- Non-turbo model
  
  Fig 1: Identifying Radiator Cap Tester - Non-Turbo Model
- Turbo model
Fig 2: Identifying Radiator Cap Tester - Turbo Model
Check the radiator cap valve open pressure using radiator cap tester.
Raise the pressure until the needle of gauge stops and see if the pressure can be retained for five to 6 seconds. The radiator cap is normal if a pressure above the service limit value has been maintained for this period.

CAUTION: Rust or dirt on the cap may prevent valve from functioning normally: be sure to clean the cap before testing.

Radiator side for Non-turbo model and coolant filler tank side for Turbo model

Specification:

93 - 123 kPa (0.95 - 7.25 kg/cm ² , 14 - 18 psi)

Service limit pressure:

83 kPa (0.85 kg/cm ² , 12 psi)

Radiator side of Turbo model

Specification:

122 - 152 kPa (1.24 - 1.55 kg/cm ² , 18 - 22 psi)

Service limit pressure:

112 kPa (1.14 kg/cm ² , 16 psi)

Fig 3: Checking Radiator Cap Valve Open Pressure

Fig 4: Identifying Radiator Cap Valve Check Points For Deformation
Start the engine, and then inspect that it does not overheat or it is cooled excessively. If it overheats or it is cooled excessively, check the cooling system. <Ref. to INSPECTION , Water Pump. > <Ref. to INSPECTION , Thermostat. > <Ref. to RADIATOR . > <Ref. to RADIATOR CAP . >
Check the radiator fan operates using Subaru Select Monitor, when the coolant temperature exceeds 95°C (203°F). If it does not operate, check the radiator fan system. <Ref. to RADIATOR FAN SYSTEM . >