# Cooling system leak test pressure (NA6)

Canonical URL: https://miatatorque.com/spec/cooling-system-leak-test-pressure-na6/

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

Confidence: fsm

103 kPa (1.05 kg/cm², 15 psi)

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": "cooling-system-leak-test-pressure-na6",
  "name": "Cooling system leak test pressure (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years inferred from 1990 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "103 kPa (1.05 kg/cm², 15 psi)",
  "procedure": {
    "notes": "Connect a radiator pressure tester and specified adapter at the filler neck and verify pressure holds; inspect for leakage if it does not. Never remove the radiator cap while hot."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "E–4 (PDF p. 134)",
      "as_printed": "103 kPa (1.05 kg/cm², 15 psi)",
      "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": "cooling",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/cooling-system-leak-test-pressure-na6/"
}
```