Updated specs are available.
Piston to cylinder clearance — standard and maximum (NA6)
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Not yet checked against the factory manual for your car's year. It's verified in the 1990 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
Clearance: 0.0015–0.0020 in (0.039–0.052 mm) Maximum: 0.006 in (0.15 mm)Clearance: 0.039–0.052 mm (0.0015–0.0020 in) Maximum: 0.15 mm (0.006 in)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Measure piston diameter at 90 degrees to the pin, 16.5 mm (0.650 in) below the oil-ring land lower edge. Replace piston or rebore for oversize pistons if over maximum; replace rings with the piston.
Applies to
- NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.
- Verified in: 1990 Mazda MX-5 Miata Workshop Manual
Sources (1)
View 1 source citations
Page B–56 (PDF p. 83) · Printed value & notes
Part no. 1193-10-89CPage B–56 (PDF p. 83)Printed: “Clearance: 0.039—0.052mm (0.0015—0.0020 in) Maximum: 0.15mm (0.006 in)”
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