* Year of the truck: Torque specs change from year to year, and even within model years depending on engine.
* Engine type: A 3.5L EcoBoost will have different specs than a 5.0L V8, for example.
* Head bolt material: Different materials require different tightening procedures. Some use a specific stretch-to-yield method requiring multiple steps.
To find the correct torque specification, you MUST consult your vehicle's repair manual. This manual will provide the precise torque sequence and specifications for your specific F-150's engine. You can usually find this manual online (often for a fee) or at a parts store.
Using the incorrect torque can lead to serious engine damage, including a blown head gasket or cracked cylinder head. It is not something to guess at.
