Respuesta :
Answer: Technician A
Explanation: Technician A is correct. Improper wheel torque can indeed lead to LRO (Lateral Run-Out) issues. Let me explain further:
LRO and Brake Rotor Warp:
LRO refers to the deviation of the brake rotor’s surface from a perfectly flat plane. It can cause vibrations, uneven braking, and pedal pulsation.
Brake rotor warp is a common misconception. Instead of actual warping, it’s usually caused by disc thickness variation due to LRO.
Improper wheel torque contributes significantly to LRO.
Why Improper Torque Matters:
When you tighten lug nuts, they clamp the wheel, brake rotor, and wheel hub together.
Proper torque ensures that the clamping force is evenly distributed across all lug nuts.
Undertorque (insufficient torque) can lead to wheel detachment.
Overtorque (overstretching the wheel stud) can cause stud failure or distort the rotor and hub.
Best Practices for Tightening Lug Nuts:
Cleanliness: Clean the wheel hub and lug nut threads thoroughly. Rust or debris can affect torque application.
Anti-Seize: Apply anti-seize lubricant (if needed) to the center hole but not to the studs or nuts.
Hand Tighten: Start by hand-tightening each nut onto the wheel studs.
Star Pattern: Use a lug wrench to tighten them further, following a star pattern (opposite nuts in a diagonal pattern).
Torque Wrench: Always finish by using a torque wrench set to the manufacturer’s recommended torque specification12.
Remember, proper torque prevents damage to wheels, hubcaps, and disc brakes, ensuring safety on the road.
