Showing specs for all NA & NB Miatas

Camshaft journal oil clearance (NA8)

Oil clearance:0.0014—0.0031 in (0.035—0.081 mm) Maximum: 0.006 in (0.15 mm)Oil clearance:0.035—0.081mm {0.0014—0.0031 in} Maximum: 0.15mm {0.006 in}

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Procedure starts B–52/PDF89: remove HLAs, clean oil/debris from journals and bearing surfaces, place Plastigage axially, fit caps by numbers/arrows and tighten in factory order and stages to 11.3–14.2 N·m. Remove caps and read Plastigage. Replace head if excessive.

Applies to
  • NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual