Updated specs are available.
Crankshaft main bearing oil clearance (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.
Oil clearance: 0.0008—0.0014 in (0.018—0.036 mm) Maximum: 0.004 in (0.10 mm)Oil clearance: 0.018—0.036mm {0.0008—0.0014 in} Maximum: 0.10mm {0.004 in}
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Remove oil/debris; fit grooved upper bearings and thrust bearings with oil grooves facing crankshaft. Place Plastigage axially; do not rotate crank. Install numbered caps in correct orientation and tighten in factory sequence/stages to 54–58 N·m. Read widest and narrowest Plastigage points for minimum and maximum clearance.
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–62 (PDF p. 99) · Printed value & notes
Page B–62 (PDF p. 99)Printed: “Oil clearance: 0.018—0.036mm {0.0008—0.0014 in} Maximum: 0.10mm {0.004 in}”
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