# Crankshaft crankpin journal diameter (NA8)

Canonical URL: https://miatatorque.com/spec/crankshaft-crankpin-diameter-na8/

Applicability: NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.

Confidence: fsm

Crankpin journal
Diameter: 44.940—44.956mm {1.7693—1.7699 in}

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "crankshaft-crankpin-diameter-na8",
  "name": "Crankshaft crankpin journal diameter (NA8)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1994,
        1997
      ],
      "engines": [
        "BP"
      ],
      "note": "Other years inferred from 1994 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "Crankpin journal\nDiameter: 44.940—44.956mm {1.7693—1.7699 in}",
  "procedure": {
    "notes": "Standard rod-journal diameter; measure X and Y directions at two axial points."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1994",
      "page": "B–57 (PDF p. 94)",
      "as_printed": "Crankpin journal\nDiameter: 44.940—44.956mm {1.7693—1.7699 in}",
      "verified_years": [
        1994,
        1994
      ],
      "document": {
        "id": "fsm-1994",
        "tier": 1,
        "title": "1994 Mazda MX-5 Miata Workshop Manual",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1994,
              1997
            ],
            "engines": [
              "BP"
            ]
          }
        ],
        "note": "Mazda's base manual for 1994–97; later model years got supplements, which we haven't checked yet."
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/crankshaft-crankpin-diameter-na8/"
}
```