# Camshaft lobe height — standard and minimum (NA6)

Canonical URL: https://miatatorque.com/spec/camshaft-lobe-height-na6/

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

Confidence: fsm

Height
Standard
IN: 40.888 mm (1.6098 in)
EX: 40.889 mm (1.6098 in)
Minimum
IN: 40.688 mm (1.6019 in)
EX: 40.689 mm (1.6019 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-lobe-height-na6",
  "name": "Camshaft lobe height — standard and minimum (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years inferred from 1990 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "Height\nStandard\nIN: 40.888 mm (1.6098 in)\nEX: 40.889 mm (1.6098 in)\nMinimum\nIN: 40.688 mm (1.6019 in)\nEX: 40.689 mm (1.6019 in)",
  "procedure": {
    "notes": "Measure each cam lobe at the factory-indicated two points; keep intake and exhaust values separate."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "B–52 (PDF p. 79)",
      "as_printed": "Height\nStandard\nIN: 40.888mm (1.6098 in)\nEX: 40.889mm (1.6098 in)\nMinimum\nIN: 40.688mm (1.6019 in)\nEX: 40.689mm (1.6019 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/camshaft-lobe-height-na6/"
}
```