# Piston ring-to-land clearance (Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/piston-ring-land-clearance-msm/

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

Confidence: fsm

Standard clearance
Top : 0.030—0.065 mm {0.0012—0.0025 in}
Second : 0.030—0.070 mm {0.0012—0.0027 in}
Oil : 0.07—0.16 mm {0.003—0.006 in}
Maximum clearance
Top, Second : 0.15 mm {0.006 in}
Oil : 0.20 mm {0.008 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": "piston-ring-land-clearance-msm",
  "name": "Piston ring-to-land clearance (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 clearance\nTop : 0.030—0.065 mm {0.0012—0.0025 in}\nSecond : 0.030—0.070 mm {0.0012—0.0027 in}\nOil : 0.07—0.16 mm {0.003—0.006 in}\nMaximum clearance\nTop, Second : 0.15 mm {0.006 in}\nOil : 0.20 mm {0.008 in}",
  "procedure": {
    "notes": "Measure around the entire circumference. Replace piston and rings as necessary."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "workshop-bp-turbo-2004",
      "page": "01–10–23 (PDF p. 35)",
      "as_printed": "Standard clearance\nTop : 0.030—0.065 mm {0.0012—0.0025 in}\nSecond : 0.030—0.070 mm {0.0012—0.0027 in}\nOil : 0.07—0.16 mm {0.003—0.006 in}\nMaximum clearance\nTop, Second : 0.15 mm {0.006 in}\nOil : 0.20 mm {0.008 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/piston-ring-land-clearance-msm/"
}
```