Updated specs are available.
Valve stem-to-guide 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.
Clearance IN: 0.0002—0.0023 in (0.005—0.060 mm) EX: 0.0004—0.0025 in (0.010—0.065 mm) Maximum: 0.008 in (0.20 mm)Clearance IN: 0.005—0.060mm {0.0002—0.0023 in} EX: 0.010—0.065mm {0.0004—0.0025 in} Maximum: 0.20mm {0.008 in}
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Calculate each corresponding guide inside diameter minus valve-stem outside diameter. Replace valve and/or guide if outside specification.
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–48 (PDF p. 85) · Printed value & notes
Page B–48 (PDF p. 85)Printed: “Clearance IN: 0.005—0.060mm {0.0002—0.0023 in} EX: 0.010—0.065mm {0.0004—0.0025 in} Maximum: 0.20mm {0.008 in}”
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