Updated specs are available.
Camshaft journal oil clearance — standard and maximum (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.
Oil clearance: 0.0014–0.0032 in (0.035–0.081 mm) Maximum: 0.006 in (0.15 mm)Oil clearance: 0.035–0.081 mm (0.0014–0.0032 in) Maximum: 0.15 mm (0.006 in)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Use Plastigage with clean, oil-free journals/bearing surfaces and HLA removed. Follow cap numbering, direction and factory tightening order on B–53; replace the cylinder head if clearance exceeds 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–54 (PDF p. 81) · Printed value & notes
Part no. 1193-10-89CPage B–54 (PDF p. 81)Printed: “Oil clearance: 0.035—0.081mm (0.0014—0.0032 in) Maximum: 0.15mm (0.006 in)”
Related service specs
- Accessory drive belt deflection — new belt (NA6)
- Accessory drive belt tension — new belt (NA6)
- Accessory drive belt deflection — used belt (NA6)
- Accessory drive belt tension — used belt (NA6)
- Compression pressure — standard (NA6)
- Compression pressure — minimum (NA6)
- Compression pressure — maximum cylinder difference (NA6)
- Cylinder head gasket face distortion — maximum (NA6)