Updated specs are available.
Valve seat contact width (NA8)
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 1994 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
Width: 0.032—0.055 in (0.8—1.4 mm)Width: 0.8—1.4mm {0.032—0.055 in}
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Measure contact width after checking complete 360-degree seating with Prussian blue; contact must be centered on valve face. Seat machining angles excluded.
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–50 (PDF p. 87) · Printed value & notes
Page B–50 (PDF p. 87)Printed: “Width: 0.8—1.4mm {0.032—0.055 in}”
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