* Specific engine year: Torque specs change slightly between model years.
* Head bolt type: Different types of head bolts (e.g., standard, head studs) require different torque sequences and specifications.
* Cylinder head material: While less common, variations in the cylinder head material might influence the torque spec.
You absolutely must consult a service manual specific to the year and model of your Duramax engine. This manual will provide the correct torque sequence and specifications, which are crucial to prevent head gasket failure or damage to the engine. Using the wrong torque can lead to catastrophic engine failure.
Trying to find this information online without knowing the exact year and model of your engine is unreliable and potentially dangerous. A GM service manual, a reputable repair manual (like a Chilton or Haynes manual), or a qualified mechanic are your best resources for accurate information.
