Updated specs are available.
Thermostat sub valve full-open lift — minimum (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.
0.06 in (1.5 mm) minimum at 212 °F (100 °C)1.5 mm {0.06 in} minimum at 100°C {212°F}
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Factory two-stage thermostat with separate main and sub valves. Visually check valve is airtight, then place thermostat and thermometer in water and heat the water. Do not apply these two-stage specifications to an aftermarket single-stage thermostat. Minimum lift at the specified full-open temperature.
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 E–9 (PDF p. 145) · Printed value & notes
Page E–9 (PDF p. 145)Printed: “Full-open lift Sub: 1.5mm {0.06 in} min.”
Related service specs
- Cooling system leak test pressure (NA6)
- Radiator cap pressure test (NB2 and Mazdaspeed)
- Radiator cap pressure test (NA8)
- Thermostat main valve initial opening temperature (NA8)
- Thermostat sub valve initial opening temperature (NA8)
- Thermostat full-open temperature (NA8)
- Thermostat main valve full-open lift — minimum (NA8)
- Radiator cap pressure test (NB1)