Exhaust valve clearance — cold (NB2 and Mazdaspeed)

0.011–0.013 in (0.28–0.34 mm)0.28–0.34 mm {0.011–0.013 in}

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

Procedure

Cold engine only. Measure with the relevant cam lobes on their base circles using the factory No.1/No.4 compression-TDC inspection positions; adjust with the correct shim if outside standard. The actual 2005 engine technical-data table explicitly includes BP and BP WITH TC; the displayed setting applies to both.

Applies to

NB 2001–2005 (BP-Z3) — Other years inferred from 2003 factory evidence.
NB 2004–2005 (BP-Z3-TURBO) — 2005 factory technical data explicitly includes BP WITH TC; 2004 inferred within MSM family.
Verified in: 2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture); 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)

Sources (2)

View 2 source citations

2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
Page Valve Clearance Inspection (PDF p. 579) · Printed value & notes
Page Valve Clearance Inspection (PDF p. 579)
Printed: “Standard [Engine cold] EX: 0.28—0.34 mm {0.011—0.013 in} (0.31±0.03 mm {0.012±0.0012 in})”
2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
Page Engine Technical Data (PDF p. 1046) · Printed value & notes
Page Engine Technical Data (PDF p. 1046)
Printed: “Valve clearance [Engine cold] EX 0.28—0.34 mm {0.011—0.013 in} (0.31±0.03 mm {0.012±0.0012 in})”

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