# Piston pin to piston clearance (NA6)

Canonical URL: https://miatatorque.com/spec/piston-pin-clearance-na6/

Applicability: NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.

Confidence: fsm

Clearance: -0.005–0.013 mm (-0.0002–0.0005 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-pin-clearance-na6",
  "name": "Piston pin to piston clearance (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years inferred from 1990 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "Clearance: -0.005–0.013 mm (-0.0002–0.0005 in)",
  "procedure": {
    "notes": "Measure pin and piston pin-hole diameters in X/Y directions at four points. Negative clearance is printed; do not replace it with zero. Replace piston and/or pin if outside specification."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "B–57 (PDF p. 84)",
      "as_printed": "Clearance: -0.005—0.013mm (-0.0002—0.0005 in)",
      "verified_years": [
        1990,
        1990
      ],
      "document": {
        "id": "fsm-1990",
        "tier": 1,
        "title": "1990 Mazda MX-5 Miata Workshop Manual",
        "part_number": "1193-10-89C",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1990,
              1990
            ],
            "engines": [
              "B6"
            ]
          }
        ],
        "url": "https://archive.org/details/1990-mazda-mx-5-miata-workshop-manual_202411"
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/piston-pin-clearance-na6/"
}
```