Updated specs are available.
Cylinder head manifold face distortion — 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.
Distortion: 0.006 in (0.15 mm) max.Distortion: 0.15 mm (0.006 in) max.
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Measure each manifold contact surface in the four factory-specified directions; grind or replace the head if out of specification.
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–49 (PDF p. 76) · Printed value & notes
Part no. 1193-10-89CPage B–49 (PDF p. 76)Printed: “Distortion: 0.15mm (0.006 in) max.”
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