How Can Over-Tightening Lug Nuts Warp Rotors?

Car braking systems consist of myriad parts, including rotors. Installation and repair of rotors require proper torquing of the assemblies, or permanent damage can occur, necessitating rotor replacement.

Function

Rotors, also referred to as brake discs, are the circular portion of the brake assembly that the brake pads attach to for stopping the vehicle. Without a properly aligned rotor, the braking system may be compromised.

Features

It is possible to warp the rotors when torquing the lug nuts. The car's wheels are attached to the rotor through screw and lug nut assemblies. If the nuts are over-tightened, the resulting pressure can alter the shape of the rotor beneath.

Significance

If the rotor is warped, the brake pads do not have an even surface on which to stop the vehicle, causing faulty braking or possibly failure. It is recommended to use a torque wrench to ensure lug nuts are tightened with proper force, based on the manufacturer's specifications.