Updated specs are available.
Main bearing oil clearance — standard (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.
0.018–0.036 mm (0.0007–0.0014 in)
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Measure Plastigage at each journal at its widest point for the smallest clearance and narrowest point for the largest clearance. Follow B–63–64 inspection procedure.
Applies to
- NA 1990–1993 (B6) — 1991–1993 applicability inferred from 1990 within the owner-approved NA6 group.
- Verified in: 1990 Mazda MX-5 Miata Workshop Manual
Sources
- Part no. 1193-10-89CPage B–64 (PDF p. 91)Printed: “0.018—0.036mm (0.0007—0.0014 in)”