Cooling System: Inspection

PRESSURE: 

• 157 kPa (1.6 kg/cm ²  , 23 psi) 

Check the following points.

• Each portion of radiator for leakage
• Hose joints and other connections for leakage
  CAUTION:

  • For turbo model, be sure to install tester to filler tank side.
  • When attaching or detaching tester and when operating tester, use special care not to deform radiator filler neck.
  • When performing this check, be sure to keep the engine stationary and fill the radiator with coolant.
  • Wipe off check points before applying pressure.
  • Use care not to spill coolant when detaching the tester from radiator.
• Non-turbo model
  Fig 1: Attaching Radiator Cap Tester To Filler Neck

  Courtesy of SUBARU OF AMERICA, INC.
• Turbo model
  Fig 2: Attaching Radiator Cap Tester To Filler Neck

  Courtesy of SUBARU OF AMERICA, INC.

Raise the pressure until the needle of gauge stops and see if the pressure can be retained for 5 to 6 seconds. The radiator cap is normal if a pressure above the service limit value has been maintained for this period.

Radiator cap valve open pressure: 

• Standard value: 
  • 93 - 123 kPa (0.95 - 1.25 kg/cm ²  , 14 - 18 psi) 
• Service limit: 
  • 83 kPa (0.85 kg/cm ²  , 12 psi) 

Fig 3: Checking Radiator Cap Valve Open Pressure

Courtesy of SUBARU OF AMERICA, INC.

Fig 4: Identifying Deformation

Courtesy of SUBARU OF AMERICA, INC.