# Camshaft journal diameter (Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/camshaft-journal-diameter-msm/

Applicability: NB 2004–2005 (BP-Z3-TURBO) — 2004 factory turbo-engine evidence; 2005 inferred within MSM family.

Confidence: fsm

Standard diameter
25.940—25.965 mm {1.0213—1.0222 in}
Minimum diameter
25.910 mm {1.0201 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": "camshaft-journal-diameter-msm",
  "name": "Camshaft journal diameter (Mazdaspeed)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2004,
        2005
      ],
      "engines": [
        "BP-Z3-TURBO"
      ],
      "note": "2004 factory turbo-engine evidence; 2005 inferred within MSM family."
    }
  ],
  "kind": "non-torque",
  "value_text": "Standard diameter\n25.940—25.965 mm {1.0213—1.0222 in}\nMinimum diameter\n25.910 mm {1.0201 in}",
  "procedure": {
    "notes": "Measure X and Y at both specified axial positions."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "workshop-bp-turbo-2004",
      "page": "01–10–21 (PDF p. 33)",
      "as_printed": "Standard diameter\n25.940—25.965 mm {1.0213—1.0222 in}\nMinimum diameter\n25.910 mm {1.0201 in}",
      "verified_years": [
        2004,
        2004
      ],
      "document": {
        "id": "workshop-bp-turbo-2004",
        "tier": 1,
        "title": "2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turbo",
        "part_number": "9999-95-EWBP-04",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2004,
              2004
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/camshaft-journal-diameter-msm/"
}
```