# Crankshaft thrust bearing width by size (NA8)

Canonical URL: https://miatatorque.com/spec/crankshaft-thrust-bearing-width-na8/

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

Confidence: fsm

Thrust bearing width
Standard:
2.500—2.550mm {0.0985—0.1003 in}
0.25mm {0.010 in} oversize:
2.625—2.675mm {0.1034—0.1053 in}
0.50mm {0.020 in} oversize:
2.750—2.800mm {0.1083—0.1102 in}
0.75mm {0.030 in} oversize:
2.875—2.925mm {0.1132—0.1151 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-thrust-bearing-width-na8",
  "name": "Crankshaft thrust bearing width by size (NA8)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1994,
        1997
      ],
      "engines": [
        "BP"
      ],
      "note": "Other years inferred from 1994 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "Thrust bearing width\nStandard:\n2.500—2.550mm {0.0985—0.1003 in}\n0.25mm {0.010 in} oversize:\n2.625—2.675mm {0.1034—0.1053 in}\n0.50mm {0.020 in} oversize:\n2.750—2.800mm {0.1083—0.1102 in}\n0.75mm {0.030 in} oversize:\n2.875—2.925mm {0.1132—0.1151 in}",
  "procedure": {
    "notes": "Factory selection dimensions for correcting crankshaft end play; retain correct mating crankshaft dimensions."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1994",
      "page": "B–63 (PDF p. 100)",
      "as_printed": "Thrust bearing width\nStandard:\n2.500—2.550mm {0.0985—0.1003 in}\n0.25mm {0.010 in} oversize:\n2.625—2.675mm {0.1034—0.1053 in}\n0.50mm {0.020 in} oversize:\n2.750—2.800mm {0.1083—0.1102 in}\n0.75mm {0.030 in} oversize:\n2.875—2.925mm {0.1132—0.1151 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-thrust-bearing-width-na8/"
}
```