The act of torquing down stretch-to-yield fasteners (which are used on the head bolts, main cap bolts, harmonic balancer, and other major components) goes like this. First, the underside of the fastener head is lubricated, and the bolt is torqued to the minimal level; then using this torque angle socket (shown), a specific amount of additional twist is applied to the bolt. Often, the twist is added in two steps, like on the cylinder head bolts.
Gen III GM Small Block Tech