Quote:
Originally Posted by Logicoeur
That kind of pulsating is generally from pad deposits. In high salt areas like yours and mine steel rotors will take a beating and start showing ridges quickly. Take your finger and run it along the rotor face and you will see where the high spots are.
|
This is correct. Warped rotors is a misnomer. They do not warp unless there is a manufacturing defect or something. Pad deposits create high spots on the face of the rotor which causes the vibration and pulsing as the pad goes over those spots. It might be imperceptible to your finger, however, as is only takes a tiny amount. The typical cause is abruptly hitting the brakes frequently, or holding your foot on the brake firmly when the pads and rotors are hot (such as at a stoplight at the bottom of a hill). You can just get your rotors turned if you want to get rid of them - they basically take the minimum amount of material off to remove the high spots and create a new surface for the 'low' spots.