The practice of tightening bolts/nuts to a specific torque value followed by an additional angle (e.g., 90° to 180°) is known as "torque-to-yield" (TTY) or "angle-controlled tightening." This method is used for critical engine components where precise clamping force is crucial. Why TTY? 1. Precise Clamping Force: TTY ensures a consistent and precise clamping force, beyond the traditional torque specification. This is particularly important for engine components subject to high stresses and tempe