Updated specs are available.
Valve spring free length — standard and minimum (NA6)
This spec doesn't apply to the car you selected.
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.
Free length Standard IN: 1.890 in (48.0 mm) EX: 1.902 in (48.3 mm) Minimum IN: 1.850 in (47.0 mm) EX: 1.862 in (47.3 mm)Free length Standard IN: 48.0 mm (1.890 in) EX: 48.3 mm (1.902 in) Minimum IN: 47.0 mm (1.850 in) EX: 47.3 mm (1.862 in)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Inspect each spring for cracks and damage; replace if necessary.
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–52 (PDF p. 79) · Printed value & notes
Part no. 1193-10-89CPage B–52 (PDF p. 79)Printed: “Free length Standard IN: 48.0mm (1.890 in) EX: 48.3mm (1.902 in) Minimum IN: 47.0mm (1.850 in) EX: 47.3mm (1.862 in)”
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