Showing specs for all NA & NB Miatas

Radiator cap pressure test (NB1)

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

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Attach removed cap to cap tester with proper adapter and gradually apply pressure. Pressure must stabilize in specification and hold 10 seconds. Cap test, separate from system leakage test on the same page. Repeated in technical data 01–50–2 (PDF313).

Applies to
  • NB 1999–2000 (BP-4W) — Other years inferred from 1999 factory evidence.
  • Verified in: 1999 Mazda MX-5 Miata Workshop Manual