Showing specs for all NA & NB Miatas

Valve spring out-of-square (NA8)

Out-of-square: 0.0638 in (1.62 mm) max.Out-of-square: 1.62mm {0.0638 in} max.

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

Measure spring against a square on a flat reference surface; replace as necessary.

Applies to
  • NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual