Technician A says that most fasteners do not need to be torqued to specifications. Technician B says that all fasteners must be tightened with an impact wrench until they meet specifications. Who is right?

The correct choice indicates that neither technician is accurately reflecting proper procedure. In vehicle maintenance and repair, it is essential to follow manufacturer specifications for torquing fasteners. Most critical fasteners, especially those subject to vibration or load, require precise torque settings to ensure safety and optimal function.

Technician A's claim that most fasteners do not need to be torqued to specifications overlooks the importance of correct torque settings on many components, which are vital for preventing issues such as loosening or failure during operation.

On the other side, Technician B's assertion that all fasteners must be tightened with an impact wrench is also not correct. While an impact wrench can be useful for quickly fastening bolts, it does not provide the precision needed for all applications. Many fasteners require a specific torque value that may not be achievable with an impact tool alone. Using an impact wrench without checking torque specifications can lead to over-tightening or failure of the fastener.

Thus, both technicians present misleading information, reinforcing the need to follow proper procedures and torque specifications to ensure safe and effective vehicle maintenance.