Subaru IMPREZA 2002 Service Manual page 251

COOLING
RADIATOR CAP
8. Radiator Cap
A: INSPECTION
1) Attach the radiator cap to the tester.
G2M0223
2) Increase pressure until the tester gauge pointer
stops. Radiator cap is functioning properly if it holds
the service limit pressure for five to six seconds.
Standard pressure:
93
-
123 kPa (0.95
-
1.25 k # c d , 14
-
18
Psi)
Service limit pressure:
CAUTION:
Be sure to remove foreign matter and rust from
the cap in advance otherwise, results of pres-
sure test will be incorrect.
83 kPa (0.85 k # c d , 12 psi)
CO-45