Some fasteners on the 4 cylinder and 6 cylinder engines are "torque-to-yield" fasteners. Torque-to-yield fasteners must be replaced whenever removed and require a torque angle meter in addition to a torque wrench for proper installation. Simply put, a "torque-to-yield" fastener is designed to stretch a certain amount upon correct installation. This is why they cannot be re-used. Once stretched in position, this action cannot be repeated.

Some fasteners on the 4 cylinder and 6 cylinder engines are "one time use" fasteners. One time use fasteners have been identified by engineering as fasteners that must be replaced whenever removed.

The process to use a torque angle meter tool is as follows. First, a specific torque is applied using a torque wrench. Next, a special angle of rotation(s) is applied using a torque angle meter tool. For example, the specification of 27 N·m (20 ft-lbs) + 60° + 30° means:

1. Use a torque wrench to tighten all bolts in sequence to 27 N·m (20 ft-lbs).
2. Then, use a torque angle meter to turn all bolts in sequence an additional 60°.
3. Finally, use a torque angle meter again to turn all bolts in sequence another 30°.

Do not short-cut this sequence by tightening to specification, then turning to 90° (60° + 30°) in one step. Tightening is done in steps for proper bolt stretching and clamping to take place.