Updated specs are available.
Crankshaft main journal diameter (NA8)
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Not yet checked against the factory manual for your car's year. It's verified in the 1994 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
Main journal Diameter: 1.9661—1.9667 in (49.938—49.956 mm)Main journal Diameter: 49.938—49.956mm {1.9661—1.9667 in}
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Standard diameter; measure X and Y directions at two axial points. Regrind below minimum only to factory undersize-bearing requirements.
Applies to
- NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
- Verified in: 1994 Mazda MX-5 Miata Workshop Manual
Sources (1)
View 1 source citations
- 1994 Mazda MX-5 Miata Workshop ManualTier 1
Page B–57 (PDF p. 94) · Printed value & notes
Page B–57 (PDF p. 94)Printed: “Main journal Diameter: 49.938—49.956mm {1.9661—1.9667 in}”
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