Radiator Cap: Inspection
WARNING: This page is about a different car, the 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Be sure to remove foreign matter and rust from the cap in advance otherwise, results of pressure test will be incorrect.
- Attach the radiator cap to the tester.
- Increase pressure until the tester gauge pointer stops. Radiator cap is functioning properly if it holds the service limit pressure for five-six seconds.
Standard pressure: 93-123 kPa (0.95-1.25 kg/cm2 , 14-18 psi)
Service limit pressure: 83 kPa (0.85 kg/cm2 , 12 psi)