Auto Repair Encyclopedia
Brake Rotor Re-Machine
Sometimes referred to as Replace Brake Pads, Replace Brake Pad, Replace Pad, Replace Pads, Brake Pad Replace, Brake Pads Replace, Brake Pads and Rotors
Brake rotors may need to be re-machined if they have become damaged by heat generated during braking or if the vehicle has been driven with worn-out brake pads.
Vibration felt in the brake pedal or steering wheel while braking may indicate that the brake rotors need to be re-machined or replaced.
On many front wheel–drive vehicles, the brake rotors can be machined while they are still on the vehicle. Other vehicles' brake rotors must be removed from the vehicle to be re-machined.
Re-machining brake rotors means that damaged material is removed. There is a maximum amount of damaged material that can be removed before the brake rotors are deemed not serviceable and must be replaced. Brake rotors removed from the vehicle are re-machined on a brake lathe. Vehicles whose brake rotors can be machined while still on the vehicle are serviced using a portable brake lathe.
On some vehicles, it is not recommended to re-machine brake rotors at all.
About this Repair: Brake Pad Replacement, Resurface Rotors
Recommendations
Shops will often refer to brake pad wear as a percentage of material remaining. Ask the shop to be specific about how much of the pad is remaining. We recommend that brake pads are replaced when there is 20% or less material remaining.
The brake rotors should always be inspected when the pads are replaced, and may need to be replaced or resurfaced.
We recommend braking gently for the first 40 to 50 miles of driving on new pads. This will allow them to adjust to the rotors and help prevent squeaking.
Why this happens
Worn brake pads can result in a loud squeaking or grinding noise while driving, especially at low speeds. Replacing your brake pads early may prevent the brake rotors from being worn or damaged beyond repair.
Brake pads will wear out more quickly as they age. The second half of a brake pad will wear away more quickly than the first.
