Radiator cap pressure test (NB2 and Mazdaspeed)

13.5–17.7 psi (94–122 kPa; 0.95–1.25 kgf/cm²); hold 10 s94–122 kPa {0.95–1.25 kgf/cm², 13.5–17.7 psi}; hold 10 s

With the cap removed from a cool engine, attach to a cap tester with the proper adapter. Apply pressure gradually; it must stabilize within specification and hold for 10 s. This is a cap test, not a system leak-test pressure. The actual 2005 engine technical-data table explicitly includes BP and BP WITH TC; the displayed setting applies to both.