Showing specs for all NA & NB Miatas

Crankshaft pulley lock bolt (NB2)

≈116–123 ft·lb157–167 N·m157–167 N·m≈116–123 ft·lb
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Printed metric and imperial ranges disagree at the upper limit. Figure also mixes unit magnitudes under one legend; do not silently substitute a converted value. The 2005 vehicle diagram has inconsistent secondary units; this engine workshop manual prints an internally consistent tuple. Use printed N·m; inconsistent secondary units do not change the factory N·m value.

Applies to
  • NB 2001–2005 (BP-Z3)
  • NB 2004–2005 (BP-Z3-TURBO)
  • Verified in: 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture); 2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turbo
Sources
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
    Page PDF p. 670
    ≈116–123 ft·lb (157–167 N·m)
    Printed: “157-167 {16-18, 116-130}; figure legend: N·m {kgf·cm, in·lbf}”
    Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
  • 2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turboTier 1
    Part no. 9999-95-EWBP-04
    Page 01–10–3 (PDF p. 15)
    ≈116–122 ft·lb (157–166 N·m)
    Printed: “157—166 N·m {16.0—17.0 kgf·m, 116—122 ft·lbf}”
    BP WITH TC (Mazdaspeed) applicability; the normally aspirated BP workshop content does not establish applicability to the VVT engine. Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.

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