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Picked up the car from a buddy that changed the rotors and pads and bled the lines. He told me that he tested the brakes twice from 30 mph and once from 50. Is this a normal practice and should it be done?
Here is what the GM Service Manual recommends and some people do a little more by taking the speed up to 60 after 10 or so stops from 30 to 40.
Burnishing Pads and Rotors
Caution
Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
Caution
Refer to Brake Dust Caution in Cautions and Notices.
Burnishing the brake pads and brake rotors is necessary in order to ensure that the braking surfaces are properly prepared after service has been performed on the disc brake system.
This procedure should be performed whenever the disc brake rotors have been refinished or replaced, and/or whenever the disc brake pads have been replaced.
1. Select a smooth road with little or no traffic.
2. Accelerate the vehicle to 48 km/h (30 mph).
Important
Use care to avoid overheating the brakes while performing this step.
3. Using moderate to firm pressure, apply the brakes to bring the vehicle to a stop. Do not allow the brakes to lock.
4. Repeat steps 2 and 3 until approximately 20 stops have been completed. Allow sufficient cooling periods between stops in order to properly burnish the brake pads and rotors.
Picked up the car from a buddy that changed the rotors and pads and bled the lines. He told me that he tested the brakes twice from 30 mph and once from 50. Is this a normal practice and should it be done?
No, absolutely not- you should never use brakes period on a car. you act as they never existed and flinstone yourself to a stop.
some of these threads have no basis like no one thought them out before posting.
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