Showing specs for all NA & NB Miatas

Intake manifold

Manifold attachments and support brackets.

Use this checklist to track fasteners you handle. It is not a complete repair procedure or a verified disassembly order. Follow your factory manual for access, support, tightening sequences and inspections. Select your car and check each variant before using a value.

Checklist: https://miatatorque.com/jobs/intake-manifold/
All NA & NB variants; select your car to narrow the list.

You’ll replace

From the recorded replacement instructions; this is not a complete parts list. Also check the notes below.

Fluids & settings

Fluid types, capacities and settings have not been catalogued for this job. Check your factory manual before filling or adjusting.

1. Manifold sections and head attachments

Intake manifold nuts and bolts
NA 1990–1997 (B6/BP)
Factory manual14–19 ft·lb19–25 N·m19–25 N·m14–19 ft·lb
Replace
Gasket
Notes
In the 1990 manual the intake manifold bracket is a separate spec: 36–54 N·m (27–40 ft·lb), same page.
  • 1990 Mazda MX-5 Miata Workshop Manual — Page B–80Printed: “19—25 N·m (1.9—2.6 m-kg, 14—19 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page B–80Printed: “19–25 N·m (1.9–2.6 kgf·m, 14–18 ft·lbf)”
Intake manifold nuts and bolts (NB)
NB 1999–2000 (BP-4W)
Factory manual≈16–22 ft·lb22–30 N·m22–30 N·m≈16–22 ft·lb
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 01–13–2Printed: “22—30 {2.0—3.1, 15—22}”
Intake manifold to head nuts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual≈14–18 ft·lb19–25 N·m19–25 N·m≈14–18 ft·lb
Notes
Imperial range printed here does not agree with the metric values; preserved for review, not silently converted. Inconsistent printed unit(s) omitted from structured torque: ftlb. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 764Printed: “19—25 {1.9—2.4, 17—21} N·m {kgf·m, ft·lbf}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.
Intake manifold upper section bolts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual≈14–18 ft·lb19–25 N·m19–25 N·m≈14–18 ft·lb
Notes
Replace gasket. Inconsistent printed unit(s) omitted from structured torque: ftlb. Use printed N·m; inconsistent secondary units do not change the factory N·m value.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 764Printed: “19—25 {1.9—2.6, 14—18} N·m {kgf·m, ft·lbf}”Printed N·m is authoritative per owner instruction. Secondary-unit misprints are preserved in as_printed but omitted from structured torque.

2. Support brackets

Intake manifold bracket bolts
NA 1994–1997 (BP); NA 1990–1993 (B6)
Factory manual28–38 ft·lb38–51 N·m38–51 N·m28–38 ft·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page B–80Printed: “36—54 N·m (3.7—5.5 m-kg, 27—40 ft-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page B–80Printed: “38–51 N·m (3.8–5.3 kgf·m, 28–38 ft·lbf)”
Intake manifold lower support bolt (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual29–33 ft·lb39–46 N·m39–46 N·m29–33 ft·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 654Printed: “39—46 {3.9—4.7, 29—33} N·m {kgf·m, ft·lbf}”
Intake manifold support bracket upper bolts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual28–38 ft·lb38–51 N·m38–51 N·m28–38 ft·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 764Printed: “38—51 {3.8—5.3, 28—38} N·m {kgf·m, ft·lbf}”
Intake manifold side support bolts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual70–95 in·lbin·lb7.9–10.7 N·m7.9–10.7 N·m70–95 in·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 764Printed: “7.9—10.7 {80—110, 69.5—95.4} N·m {kgf·cm, in·lbf}”
Mazdaspeed intake manifold lower support bolt (NB2)
NB 2004–2005 (BP-Z3-TURBO, 6MT)
Factory manual28–38 ft·lb37.3–52 N·m37.3–52 N·m28–38 ft·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 770Printed: “37.3—52.0 {3.81—5.30, 27.6—38.3} N·m {kgf·m, ft·lbf}”

Related jobs

Exhaust manifold / header