Radiator Cap: Inspection

WARNING: This page is about a different car, the 2004 Subaru Outback, 2004 Subaru Legacy, and 2004 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

Attach radiator

Fig 1: Connecting Radiator
Courtesy of SUBARU OF AMERICA, INC.
Increase pressure until tester gauge pointer stops. Radiator cap is functioning properly if it holds the service limit pressure for five to six seconds.
1. Standard pressure:
  93 - 123 kPa (0.95 - 1.25 kg/cm ² , 14-18 psi)
2. Service limit pressure:
  83 kPa (0.85 kg/cm ² , 12 psi)
CAUTION: Be sure to remove foreign matter and rust from the cap before installing tester. Otherwise, results of pressure test will be incorrect.